The following discussion and analysis of our financial condition and results of
operations should be read in conjunction with our condensed consolidated
financial statements and related notes appearing elsewhere in this Quarterly
Report on Form 10-Q and in our final prospectus filed with the Securities and
Exchange Commission, or the SEC, pursuant to Rule 424(b) under the Securities
Act of 1933, as amended, or the Securities Act, on June 20, 2019, as amended by
the prospectus supplement dated September 5, 2019, or the Prospectus. In
addition to historical financial information, the following discussion and
analysis contains forward-looking statements that are based upon current plans,
expectations and beliefs that involve risks and uncertainties. Our actual
results may differ materially from those anticipated in these forward-looking
statements as a result of various factors, including those set forth under "Risk
Factors" in Item 1A of Part II of this Quarterly Report on Form 10-Q and in our
Prospectus. Our fiscal year ends January 31.
                                    Overview
Slack is a new layer of the business technology stack that brings together
people, applications, and data - a single place where people can effectively
work together, access hundreds of thousands of critical applications and
services, and find important information to do their best work. Slack has very
general and broad applicability. It is not aimed at any one specific purpose,
but at nearly anything that people do together at work. Slack is used to review
job candidates, coordinate election coverage, diagnose network problems,
negotiate budgets, plan marketing campaigns, approve menus, and organize
disaster response teams, along with countless other tasks.
Slack provides an easy way for users to share and aggregate information from
other software, take action on notifications, and advance workflows in a
multitude of third-party applications, over 2,000 of which are listed in the
Slack App Directory. Developers have collectively created more than 550,000
third-party applications or custom integrations that were used in a typical week
during the three months ended October 31, 2019. Further, Slack's platform
capabilities extend beyond integrations with third-party applications and allow
for easy integrations with an organization's internally-developed software.
Direct Listing
On June 20, 2019, we completed a direct listing of our Class A common stock, or
the Direct Listing, on the New York Stock Exchange, or the NYSE. Our restricted
stock units, or RSUs, had a performance vesting condition that was satisfied
upon the completion of the Direct Listing. In connection with this vesting, we
recorded cumulative stock-based compensation of $245.1 million on June 20, 2019.
In addition, we incurred nonrecurring fees related to financial advisory
services, audit, and legal expenses in connection with the Direct Listing and
recorded $0 and $30.4 million in general and administrative expense for the
three and nine months ended October 31, 2019, respectively.
                              Key Business Metrics
We review the following key business metrics to measure our performance,
identify trends, formulate financial projections, and make strategic decisions.
We are not aware of any uniform standards for calculating these key metrics,
which may hinder comparability with other companies who may calculate
similarly-titled metrics in a different way.
We define an organization as a separate entity, such as a company, educational
or government institution, or distinct business unit of a company, that is on a
subscription plan, whether free or paid. Once an organization has three or more
users on a paid subscription plan, we count them as a Paid Customer, and when
disclosing the number of Paid Customers, we round down to the nearest thousand.
Paid Customers
We believe that the growth in our Paid Customer base reflects our value
proposition and positions us for future growth as our Paid Customers often
expand their adoption over time and Paid Customers increase awareness of Slack,
which leads to organic adoption by new organizations. Our Paid Customers base
has expanded through increasing awareness of Slack, further developing our
go-to-market strategy and continuing to build features tuned to different
industry needs. Our Paid Customer base includes organizations of all sizes
across a wide range of industries.
As of October 31, 2019 and 2018, we had approximately 105,000 and 81,000 Paid
Customers, respectively.

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Paid Customers >$100,000
We focus on growing the number of Paid Customers >$100,000 as a measure of our
ability to scale with organizations on Slack and attract larger organizations to
Slack. We believe that our ability to increase the number of Paid Customers
>$100,000 is a key indicator for important components of the growth of our
business, including our success in expanding the number of users within a Paid
Customer, providing the functionality required by large organizations and
developing our direct sales force.
We define Paid Customers >$100,000 as those organizations on a paid subscription
plan that had more than $100,000 in annual recurring revenue, or ARR, as of a
period end. ARR is based on monthly recurring revenue, or MRR, for the most
recent month at period end, multiplied by twelve. For Paid Customers that have a
type of subscription agreement where billing is reconciled on a monthly or
quarterly basis based on usage, MRR is calculated by multiplying the monthly
subscription price, inclusive of discounts, by the number of active
subscriptions as of the month end. For Paid Customers that have a type of
subscription agreement where billing is fixed and independent of usage, MRR is
calculated by multiplying the monthly subscription price, inclusive of
discounts, by the number of purchased subscriptions.
As of October 31, 2019, we had 821 Paid Customers >$100,000, who contributed
approximately 47% and 45% of revenue for the three and nine months then ended,
respectively. As of October 31, 2018, we had 491 Paid Customers >$100,000, who
contributed approximately 39% and 38% of revenue for the three and nine months
then ended, respectively.
Net Dollar Retention Rate
We disclose Net Dollar Retention Rate as a supplemental measure of our organic
revenue growth. We believe Net Dollar Retention Rate is an important metric that
provides insight into the long-term value of our subscription agreements and our
ability to retain, and grow revenue from, our Paid Customers.
We calculate Net Dollar Retention Rate as of a period end by starting with the
MRR from all Paid Customers as of twelve months prior to such period end, or
Prior Period MRR. We then calculate the MRR from these same Paid Customers as of
the current period end, or Current Period MRR. Current Period MRR includes
expansion within Paid Customers and is net of contraction or attrition over the
trailing twelve months, but excludes revenue from new Paid Customers in the
current period, including those organizations that were only on Free
subscription plans in the prior period and converted to paid subscription plans
during the current period. We then divide the total Current Period MRR by the
total Prior Period MRR to arrive at our Net Dollar Retention Rate.
As of October 31, 2019 and 2018, our Net Dollar Retention Rate was 134% and
144%, respectively. Our Net Dollar Retention Rate has declined year over year as
our base of revenue has grown and our penetration within existing, long-term
Paid Customers has increased. Our Net Dollar Retention Rate will fluctuate in
future periods due to a number of factors, including the growing level of our
revenue base, the level of penetration within our Paid Customer base, expansion
of products and features, and our ability to retain our Paid Customers.

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                          Non-GAAP Financial Measures
In addition to our results determined in accordance with U.S. generally accepted
accounting principles, or GAAP, we believe the below non-GAAP measures are
useful in evaluating our operating performance. We use the below non-GAAP
financial information, collectively, to evaluate our ongoing operations and for
internal planning and forecasting purposes. We believe that non-GAAP financial
information, when taken collectively, may be helpful to investors because it
provides consistency and comparability with past financial performance, and
assists in comparisons with other companies, some of which use similar non-GAAP
financial information to supplement their GAAP results. The non-GAAP financial
information is presented for supplemental informational purposes only, and
should not be considered a substitute for financial information presented in
accordance with GAAP, and may be different from similarly-titled non-GAAP
measures used by other companies. A reconciliation is provided below for each
non-GAAP financial measure to the most directly comparable financial measure
stated in accordance with GAAP. Investors are encouraged to review the related
GAAP financial measures and the reconciliation of these non-GAAP financial
measures to their most directly comparable GAAP financial measures.
                                         Three Months Ended October 31,            Nine Months Ended October 31,
                                            2019                 2018                2019                 2018
                                                                     (In thousands)
Calculated Billings                  $       186,126       $       126,457     $      510,570       $      343,304
Free Cash Flow                       $       (19,106 )     $       (43,467 )   $      (61,180 )     $      (66,158 )


Calculated Billings
Calculated Billings consists of our revenue plus the change in our deferred
revenue in a given period. The Calculated Billings metric is intended to reflect
sales to new paid customers plus renewals and additional sales to existing paid
customers. Our management uses Calculated Billings to measure and monitor our
sales growth because we generally bill our paid customers at the time of sale,
but may recognize a portion of the related revenue ratably over time. For
subscriptions, we typically invoice our paid customers at the beginning of the
term, in annual or monthly installments and, from time to time, in multi-year
installments. Only amounts invoiced to a paid customer in a given period are
included in Calculated Billings. While we believe that Calculated Billings
provides valuable insight into the cash that will be generated from sales of our
subscriptions, this metric may vary from period-to-period for a number of
reasons, and therefore has a number of limitations as a quarter-over-quarter or
year-over-year comparative measure. These reasons include, but are not limited
to, the following: (i) a variety of contractual terms could result in some
periods having a higher proportion of annual subscriptions than other periods,
(ii) as we focus on sales to large organizations, the lengthening of our sales
cycle, and the variability in the timing of the execution of these larger
transactions, (iii) fluctuations in payment terms affecting the billings
recognized in a particular period, and (iv) seasonality in our billings, with a
greater proportion of our billings occurring in our fourth quarter, following
typical enterprise software buying patterns. Because of these and other
limitations, you should consider Calculated Billings along with revenue and our
other GAAP financial results.
The following table presents a reconciliation of revenue, the most directly
comparable financial measure calculated in accordance with GAAP, to Calculated
Billings, for each of the periods presented:
                                         Three Months Ended October 31,            Nine Months Ended October 31,
                                            2019                 2018                2019                 2018
                                                                     (In thousands)
Revenue                              $       168,725       $       105,648     $      448,519       $      278,585
Add: Total deferred revenue, end of
period                                       303,924               190,172            303,924              190,172
Less: Total deferred revenue,
beginning of period                         (286,523 )            (169,363 )         (241,873 )           (125,453 )
Calculated Billings                  $       186,126       $       126,457     $      510,570       $      343,304


Free Cash Flow
Free Cash Flow is a non-GAAP financial measure that we calculate as net cash
provided by (used in) operating activities less purchases of property and
equipment. We believe that Free Cash Flow is a useful indicator of liquidity
that provides information to management and investors about the amount of cash
generated from our core operations that, after the purchases of property and
equipment, can be used for strategic initiatives, including investing in our
business, making strategic acquisitions, and strengthening our balance sheet.
Free Cash Flow has limitations as an analytical tool, and it should not be
considered in isolation or as a substitute for analysis of other GAAP financial
measures, such as net cash provided by operating activities. Some of the
limitations of Free Cash Flow are that this metric does not reflect our future
contractual commitments and may be calculated

                                       23
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differently by other companies in our industry, limiting its usefulness as a
comparative measure. We expect our Free Cash Flow to fluctuate in future periods
as we invest in our business to support our plans for growth. These activities,
along with certain increased operating expenses as described below, may result
in a decrease in Free Cash Flow as a percentage of revenue in future periods.
The following table summarizes our cash flows for the periods presented and
provides a reconciliation of net cash from operating activities, the most
directly comparable financial measure calculated in accordance with GAAP, to
Free Cash Flow, for each of the periods presented:
                                         Three Months Ended October 31,           Nine Months Ended October 31,
                                           2019                 2018                2019                 2018
                                                                     (In thousands)
Net cash used in operating
activities                           $       (9,099 )     $       (28,375 )   $      (22,904 )     $       (23,454 )
Purchases of property and equipment         (10,007 )             (15,092 )          (38,276 )             (42,704 )
Free Cash Flow                       $      (19,106 )     $       (43,467 )   $      (61,180 )     $       (66,158 )
Net cash provided by (used in)
investing activities                 $      (23,858 )     $      (289,939 )   $      320,733       $      (335,688 )
Net cash provided by financing
activities                           $       11,156       $       427,623     $       15,875       $       435,554


                    Key Components of Results of Operations
Revenue
We generate substantially all of our revenue through sales of subscriptions of
Slack to organizations. We recognize subscription revenue on a straight-line
basis over the term of the contract subscription period beginning on the date
access to Slack is granted, provided all other revenue recognition criteria have
been met. Our subscriptions are generally non-cancellable and typically do not
contain general rights of return. We maintain a fair billing policy, under which
certain organizations on a paid subscription plan are entitled to credit if they
have not used the entirety of the contracted number of users for which they have
paid during the contractual term of the arrangement. These credits, accounted
for as a part of deferred revenue, may be carried over to offset future billings
and are not refundable for cash. On occasion, we also provide professional
services to organizations on Slack. Professional services revenue has not been
material to date.
Overhead Allocation and Employee Compensation Costs
We allocate shared costs, such as facilities (including rent, utilities, and
depreciation on equipment shared by all departments) and information technology,
or IT, costs to all departments based on headcount. As such, allocated shared
costs are reflected in cost of revenue and each operating expense category.
Employee compensation costs, or personnel costs, include salaries, bonuses,
benefits, and stock-based compensation for cost of revenue and each operating
expense category and also includes sales commissions for sales and marketing.
Cost of Revenue
Cost of revenue consists primarily of expenses related to hosting Slack and
providing ongoing customer support for paid customers. These expenses include
employee compensation (including stock-based compensation) and other
employee-related expenses for customer experience, professional services, and
technical operations staff, payments to outside service providers, third-party
hosting costs, payment processing fees, and amortization expense associated with
internally-developed and purchased technology. We expect our cost of revenue to
continue to increase in absolute dollar amounts as we grow our business and
revenue.
Operating Expenses
Research and Development. Research and development expenses consist primarily of
personnel costs and allocated overhead. Our research and development efforts
focus on maintaining and enhancing existing functionality of, and adding new
functionality to, Slack. We plan to increase the dollar amount of our investment
in research and development for the foreseeable future as we focus on developing
new features and enhancements. We expect, however, that our research and
development expenses will decrease as a percentage of our revenue over time as
our revenue grows, although the percentage may fluctuate from period to period
depending on fluctuations in the timing and extent of our research and
development expenses.
Sales and Marketing. Sales and marketing expenses consist primarily of personnel
costs, expenses associated with our marketing and business development programs,
including Frontiers, our annual user conference, Spec, our annual developer
conference, and other events, sponsorships, and Slack conferences. Sales and
marketing expenses also include allocated third-

                                       24
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party hosting costs as well as customer experience and technical operations
employee overhead costs for users of our free version of Slack. Sales
commissions that are directly related to acquiring sales contracts, as well as
associated payroll taxes, are deferred upon execution of a non-cancellable
contract with an organization, and subsequently amortized to sales and marketing
expense over the estimated period of benefit, typically four years. We plan to
increase the dollar amount of our investment in sales and marketing for the
foreseeable future, primarily for increased headcount for our direct sales
organization and investment in brand and product marketing efforts. We expect to
continue to incur sales and marketing expenses to the extent that we continue to
see a high-growth market opportunity to support the growth of our business. If
the growth in our business lessens over time, we plan to decrease the rate of
growth in our sales and marketing expenses. We expect, however, that our sales
and marketing expenses will decrease as a percentage of our revenue over time as
our revenue grows, although the percentage may fluctuate from period to period
depending on fluctuations in the timing and extent of our sales and marketing
expenses.
General and Administrative. General and administrative expenses consist
primarily of personnel costs for our finance and accounting, legal, human
resources, and other administrative teams as well as for certain executives and
professional fees, including audit, legal, and recruiting services. We expect to
increase the size of our general and administrative function to support the
growth of our business. We also expect to recognize certain non-recurring costs
as part of our transition to a publicly-traded company, consisting of
professional fees and other expenses. These fees are being expensed in the
period incurred. We expect to continue to incur additional expenses as a result
of operating as a public company, including costs to comply with the rules and
regulations applicable to companies listed on a U.S. securities exchange and
costs related to compliance and reporting obligations pursuant to the rules and
regulations of the SEC. In addition, as a public company, we expect to incur
increased expenses in the areas of insurance, investor relations, and
professional services. As a result, we expect the dollar amount of our general
and administrative expenses to increase for the foreseeable future, although the
dollar amount of our general and administrative expenses may decrease in certain
future periods compared to the three months ended July 31, 2019 as a result of
one-time expenses related to the Direct Listing. We expect, however, that our
general and administrative expenses will decrease as a percentage of our
revenues over time, although the percentage may fluctuate from period to period
depending on fluctuations in our revenue and the timing and extent of our
general and administrative expenses.
Other Income (Expense), Net
Other income (expense), net consists primarily of interest income earned on our
cash, cash equivalents, and marketable securities, gains or losses on foreign
currency exchange, and the change in fair value of our strategic investments.
Provision (Benefit) for Income Taxes
Provision (benefit) for income taxes consists primarily of U.S. federal, state
income taxes, and income taxes in certain foreign jurisdictions in which we
conduct business. Since inception, we have incurred operating losses and,
accordingly, have not recorded a provision for income taxes for any of the
periods presented other than provisions for foreign income tax.
In July 2015, the U.S. Tax Court issued an opinion favorable to Altera
Corporation, or Altera, with respect to the exclusion of stock-based
compensation from its intercompany cost-sharing arrangement. In June 2019, the
U.S. Court of Appeals reversed the 2015 decision of the U.S. Tax Court. On July
22, 2019, Altera petitioned the Ninth Circuit to a rehearing of a larger panel
of eleven Ninth Circuit judges. Altera's petition for rehearing was denied on
November 12, 2019. We are currently evaluating the potential impact on our
consolidated financial statements for the year ending January 31, 2020.
                             Results of Operations

The following tables set forth our results of operations for the periods presented in dollars and as a percentage of our revenue:


                                       25
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                                         Three Months Ended October 31,           Nine Months Ended October 31,
                                            2019                 2018                 2019               2018
                                                                    (In thousands)
Revenue                              $       168,725       $       105,648     $       448,519       $   278,585
Cost of revenue(1)                            23,140                13,540              72,820            35,002
Gross profit                                 145,585                92,108             375,699           243,583
Operating expenses:
Research and development(1)                   94,853                40,990             363,725           111,582
Sales and marketing(1)                        96,210                67,687             299,440           163,408
General and administrative(1)                 49,524                34,185             209,624            79,361
Total operating expenses                     240,587               142,862             872,789           354,351
Loss from operations                         (95,002 )             (50,754 )          (497,090 )        (110,768 )
Other income (expense), net                    7,135                 3,376              17,323             7,263
Loss before income taxes                     (87,867 )             (47,378 )          (479,767 )        (103,505 )
Provision (benefit) for income taxes            (101 )                 318                (504 )             753
Net loss                                     (87,766 )             (47,696 )          (479,263 )        (104,258 )
Net income (loss) attributable to
noncontrolling interest(2)                     1,395                   (24 )             2,792               156

Net loss attributable to Slack $ (89,161 ) $ (47,672 ) $ (482,055 ) $ (104,414 )

_______________

(1) Includes stock-based compensation as follows:




                                      Three Months Ended October 31,      

Nine Months Ended October 31,


                                           2019              2018              2019              2018
                                                                (In thousands)
Cost of revenue                      $         2,673     $       40     $         13,671     $      701
Research and development                      40,077          3,532              193,117          7,871
Sales and marketing                           17,638            227               82,792          1,679
General and administrative                    13,473          6,716               73,707          8,020
Total stock-based compensation       $        73,861     $   10,515     $   

363,287 $ 18,271

(2) Our condensed consolidated financial statements include our majority-owned

subsidiary, Slack Fund. The ownership interest of minority investors in Slack


    Fund is recorded as a noncontrolling interest.


                                        Three Months Ended October 31,          Nine Months Ended October 31,
                                           2019                 2018               2019                2018
Revenue                                    100  %               100  %              100  %              100  %
Cost of revenue                             14  %                13  %               16  %               13  %
Gross profit                                86  %                87  %               84  %               87  %
Operating expenses:
Research and development                    56  %                40  %               81  %               40  %
Sales and marketing                         57  %                64  %               67  %               60  %
General and administrative                  29  %                32  %               47  %               28  %
Total operating expenses                   142  %               136  %              195  %              128  %
Loss from operations                       (56 )%               (48 )%             (111 )%              (40 )%
Other income (expense), net                  4  %                 3  %                4  %                3  %
Loss before income taxes                   (52 )%               (45 )%             (107 )%              (37 )%
Provision (benefit) for income taxes         -  %                 -  %                -  %                -  %
Net loss                                   (52 )%               (45 )%             (107 )%              (37 )%
Net income (loss) attributable to
noncontrolling interest                      1  %                 -  %                -  %                -  %
Net loss attributable to Slack             (53 )%               (45 )%             (107 )%              (37 )%



                                       26

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Comparison of the Three Months Ended October 31, 2019 and 2018 Revenue and Cost of Revenue


                      Three Months Ended October 31,
                             2019                   2018       $ Change     % Change
                              (In thousands)
Revenue         $        168,725                 $ 105,648    $  63,077        60 %
Cost of revenue           23,140                    13,540        9,600        71
Gross profit    $        145,585                 $  92,108    $  53,477        58


Revenue increased $63.1 million, or 60%, for the three months ended October 31,
2019 compared to the three months ended October 31, 2018. The increase in
revenue was primarily due to expansion within our existing Paid Customers, as
reflected by our Net Dollar Retention Rate of 134% as of October 31, 2019, and
the addition of new Paid Customers, as our number of Paid Customers grew from
81,000 as of October 31, 2018 to 105,000 as of October 31, 2019.
Cost of revenue increased $9.6 million, or 71%, for the three months ended
October 31, 2019 compared to the three months ended October 31, 2018. The
increase was primarily due to a $2.9 million increase in third-party hosting
costs as the number of organizations on and users of Slack in general increased,
a $2.7 million increase in stock-based compensation and related employer payroll
taxes, primarily driven by the satisfaction of the performance vesting condition
on outstanding RSUs in connection with our Direct Listing in June 2019, a $2.0
million increase in personnel and related costs, and a $1.1 million increase in
facility- and IT-related overhead costs due to additional headcount to support
the growth in organizations on Slack.
Operating Expenses
                                      Three Months Ended October 31,
                                            2019              2018         $ Change        % Change
                                              (In thousands)
Operating expenses:
Research and development             $         94,853     $   40,990     $    53,863           131 %
Sales and marketing                            96,210         67,687          28,523            42
General and administrative                     49,524         34,185          15,339            45
Total operating expenses             $        240,587     $  142,862     $    97,725            68


Research and Development
Research and development expenses increased $53.9 million, or 131%, for the
three months ended October 31, 2019 compared to the three months ended
October 31, 2018. The increase was primarily due to a $37.7 million increase in
stock-based compensation and related employer payroll taxes, primarily driven by
the satisfaction of the performance vesting condition on outstanding RSUs in
connection with our Direct Listing in June 2019, an $11.3 million increase in
personnel costs related to increased headcount, and a $3.1 million increase in
facility- and IT-related overhead costs to support our headcount growth and the
continued development and scalability of Slack.
Sales and Marketing
Sales and marketing expenses increased $28.5 million, or 42%, for the three
months ended October 31, 2019 compared to the three months ended October 31,
2018. The increase was primarily due to a $17.9 million increase in stock-based
compensation and related employer payroll taxes, primarily driven by the
satisfaction of the performance vesting condition on outstanding RSUs in
connection with our Direct Listing in June 2019. Personnel costs, which include
customer experience and infrastructure employee costs for users of our free
version, increased by $10.6 million related to increased sales and marketing
headcount to support our growth. The increase was also driven by a $3.9 million
increase in facility- and IT-related overhead costs to support our headcount
growth, and a $2.2 million increase in third-party hosting costs for users on a
Free subscription plan of Slack primarily due to continuing growth in our user
base. These increases were partially offset by a decrease in marketing expenses
of $7.9 million due to less spending on advertising.

                                       27
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General and Administrative
General and administrative expenses increased $15.3 million, or 45%, for the
three months ended October 31, 2019 compared to the three months ended
October 31, 2018. The increase was primarily due to a $7.1 million increase in
stock-based compensation and related employer payroll taxes, primarily driven by
the satisfaction of the performance vesting condition on outstanding RSUs in
connection with our Direct Listing in June 2019, a $5.2 million increase in
personnel costs related to increases in our administrative, finance and
accounting, legal, IT, and human resources headcount, and a $1.7 million
increase in corporate expenses mainly related to local business taxes and
increased corporate insurance costs.
Other Income (Expense), Net
Other income (expense), net was $7.1 million for the three months ended
October 31, 2019, an increase of $3.8 million from the three months ended
October 31, 2018. The increase in other income (expense), net was primarily due
to a net increase in realized and unrealized gains from our strategic
investments of $3.0 million and increase of net foreign exchange gains of $0.6
million.
Provision (Benefit) for Income Taxes
The benefit for income taxes was $0.1 million for the three months ended
October 31, 2019, a decrease of $0.4 million from the three months ended
October 31, 2018, primarily related to the tax benefit resulting from
stock-based compensation of our foreign jurisdictions.

Comparison of the Nine Months Ended October 31, 2019 and 2018 Revenue and Cost of Revenue


                      Nine Months Ended October 31,
                            2019                  2018       $ Change    % Change
                             (In thousands)
Revenue         $       448,519                $ 278,585    $ 169,934        61 %
Cost of revenue          72,820                   35,002       37,818       108
Gross profit    $       375,699                $ 243,583    $ 132,116        54


Revenue increased $169.9 million, or 61%, for the nine months ended October 31,
2019 compared to the nine months ended October 31, 2018. The increase in revenue
was primarily due to expansion within our existing Paid Customers, as reflected
by our Net Dollar Retention Rate of 134% as of October 31, 2019, and the
addition of new Paid Customers, as our number of Paid Customers grew from 81,000
as of October 31, 2018 to 105,000 as of October 31, 2019.
Cost of revenue increased $37.8 million, or 108%, for the nine months ended
October 31, 2019 compared to the nine months ended October 31, 2018. The
increase was primarily due to a $14.0 million increase in stock-based
compensation and related employer payroll taxes, primarily driven by the
satisfaction of the performance vesting condition on outstanding RSUs in
connection with our Direct Listing in June 2019. The increase was also driven by
a $9.8 million increase in third-party hosting costs as the number of
organizations on and users of Slack in general increased, a $7.2 million
increase in personnel and related costs, a $3.1 million increase in facility-
and IT-related overhead costs due to additional headcount to support the growth
in organizations on Slack, and a $1.3 million increase in amortization of
acquired intangible assets.
Operating Expenses
                                 Nine Months Ended October 31,
                                       2019                  2018       $ Change    % Change
                                        (In thousands)
Operating expenses:
Research and development   $       363,725                $ 111,582    $ 252,143       226 %
Sales and marketing                299,440                  163,408      136,032        83
General and administrative         209,624                   79,361      130,263       164
Total operating expenses   $       872,789                $ 354,351    $ 518,438       146



                                       28

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Research and Development
Research and development expenses increased $252.1 million, or 226%, for the
nine months ended October 31, 2019 compared to the nine months ended October 31,
2018. The increase was primarily due to a $198.0 million increase in stock-based
compensation and related employer payroll taxes, primarily driven by the
satisfaction of the performance vesting condition on outstanding RSUs in
connection with our Direct Listing in June 2019. The increase was also driven by
a $38.1 million increase in personnel costs related to increased headcount, and
an $8.9 million increase in facility- and IT-related overhead costs to support
our headcount growth and the continued development and scalability of Slack.
Sales and Marketing
Sales and marketing expenses increased $136.0 million, or 83%, for the nine
months ended October 31, 2019 compared to the nine months ended October 31,
2018. The increase was primarily due to an $86.1 million increase in stock-based
compensation and related employer payroll taxes, primarily driven by the
satisfaction of the performance vesting condition on outstanding RSUs in
connection with our Direct Listing in June 2019. Personnel costs, which include
customer experience and infrastructure employee costs for users of our free
version, increased by $35.5 million related to increased sales and marketing
headcount to support our growth. The increase was also driven by a $12.2 million
increase in facility- and IT-related overhead costs to support our headcount
growth, an $8.3 million increase in third-party hosting costs for users on a
Free subscription plan of Slack due to continuing growth in our user base, and a
$5.3 million increase in travel and event related costs due to increased sales
activities. These increases were partially offset by a decrease in marketing
expenses of $12.3 million due to less spending on advertising.
General and Administrative
General and administrative expenses increased $130.3 million, or 164%, for the
nine months ended October 31, 2019 compared to the nine months ended October 31,
2018. The increase was primarily due to a $70.1 million increase in stock-based
compensation and related employer payroll taxes, primarily driven by the
satisfaction of the performance vesting condition on outstanding RSUs in
connection with our Direct Listing in June 2019. The increase was also driven by
one-time fees of $30.4 million related to financial advisory services, audit,
and legal expenses in connection with our Direct Listing, an $18.9 million
increase in personnel costs related to increases in our administrative, finance
and accounting, legal, IT, and human resources headcount, and a $3.7 million
increase in facility- and IT-related overhead costs due to additional headcount.
Other Income (Expense), Net
Other income (expense), net was $17.3 million for the nine months ended
October 31, 2019, an increase of $10.1 million from the nine months ended
October 31, 2018. The increase in other income (expense), net was primarily due
to a net increase in realized and unrealized gains from our strategic
investments of $5.5 million and an increase in interest income of $4.3 million
due to overall increase in cash, cash equivalents, and marketable securities.
Provision (Benefit) for Income Taxes
The benefit for income taxes was $0.5 million for the nine months ended
October 31, 2019, a decrease of $1.3 million from the nine months ended
October 31, 2018, primarily related to the tax benefit resulting from
stock-based compensation in our foreign jurisdictions.
                        Liquidity and Capital Resources
As of October 31, 2019, our principal sources of liquidity were cash, cash
equivalents, and restricted cash of $515.0 million and marketable securities of
$297.6 million. Cash and cash equivalents are comprised of bank deposits, money
market funds, and commercial paper. Restricted cash consists of cash deposited
with financial institutions as collateral for our obligations under the facility
leases in San Francisco, California and Denver, Colorado. As of October 31,
2019, restricted cash was $38.5 million. Marketable securities are comprised of
commercial paper, U.S. agency securities, U.S. government securities,
international government securities, and corporate bonds. Substantially all cash
and cash equivalents are held in the United States. Since our inception, we have
financed our operations primarily through proceeds from the issuance of our
convertible preferred stock and common stock and cash generated from the sale of
our subscriptions.
We have generated significant losses from operations and negative cash flows
from operating activities in the past as reflected in our accumulated deficit of
$1.1 billion as of October 31, 2019. We expect to continue to incur operating
losses for the foreseeable future due to the investments that we intend to make
in our business and, as a result, we may require additional capital resources to
grow our business.
On May 30, 2019, we entered into a $215.0 million revolving credit and guaranty
agreement with a syndicate of financial

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institutions. The revolving credit facility has an accordion option, which, if
exercised, would allow us to increase the aggregate commitments by up to the
greater of $200.0 million and 100% of the consolidated adjusted EBITDA of us and
our subsidiaries, plus an unlimited amount subject to satisfaction of certain
leverage ratio based compliance tests after giving effect to the exercise, in
each case subject to obtaining additional lender commitments and satisfying
certain conditions. Pursuant to the terms of the revolving credit facility, we
may issue letters of credit under the revolving credit facility, which reduce
the total amount available for borrowing under such facility. The revolving
credit facility terminates on May 30, 2024.
Interest on borrowings under the revolving credit facility accrues at a variable
rate tied to the prime rate or the LIBOR, plus the applicable margin, at our
election. The margin is 0.25% in the case of prime rate loans and 1.25% in the
case of LIBOR loans. Interest is payable quarterly in arrears. Pursuant to the
terms of the revolving credit facility, we are required to pay an annual
commitment fee that accrues at a rate of 0.10% per annum on the unused portion
of the borrowing commitments under the revolving credit facility. In addition,
we are required to pay a fee in connection with letters of credit issued and
outstanding under the revolving credit facility that accrues at a rate of 1.25%
per annum on the amount to be drawn under such letters of credit outstanding.
There is an additional fronting fee of 0.125% per annum multiplied by the
aggregate face amount of issued and outstanding letters of credit.
The revolving credit facility contains customary conditions to borrowing, events
of default, and covenants, including covenants that restrict our and our
subsidiaries' ability to, among other things, incur additional indebtedness,
create or incur liens, merge or consolidate with other companies, sell
substantially all of our assets, liquidate or dissolve, make distributions to
our equity holders or our subsidiaries' equity interests, pay dividends, make
redemptions and repurchases of stock, or engage in transactions with affiliates.
In addition, the revolving credit facility contains financial covenants,
including a minimum liquidity balance and a minimum revenue amount. We were in
compliance with all covenants under the revolving credit facility as of October
31, 2019.
As of October 31, 2019, we had no amounts or letters of credit issued and
outstanding under the revolving credit facility. Our total available borrowing
capacity under the revolving credit facility was $215.0 million as of
October 31, 2019.
We believe that current cash, cash equivalents, marketable securities, and
available borrowing capacity under the revolving credit facility will be
sufficient to fund our operations for at least the next 12 months. Our future
capital requirements, however, will depend on many factors, including our
subscription growth rate, our Net Dollar Retention Rate, the timing and extent
of spending to support our research and development efforts, the expansion of
sales and marketing activities, the introduction of new and enhanced products
and features, particularly for large organizations and for networks between
organizations and the continuing market adoption of Slack. We may in the future
enter into arrangements to acquire or invest in complementary businesses,
services, and technologies, including intellectual property rights. In the event
that additional financing is required from outside sources, we may seek to raise
additional funds at any time through equity, equity-linked arrangements, and
debt. If we are unable to raise additional capital when desired and at
reasonable rates, our business, results of operations, and financial condition
would be adversely affected. See the section titled "Risk Factors-Risks Related
to Our Business-Our failure to raise additional capital or generate cash flows
necessary to expand our operations and invest in new technologies in the future
could reduce our ability to compete successfully and harm our results of
operations."
Cash Flows
The following table summarizes our cash flows for the periods indicated:
                                                               Nine Months Ended October 31,
                                                                 2019                 2018
                                                                      (In thousands)
Net cash used in operating activities                      $      (22,904 )     $      (23,454 )
Net cash provided by (used in) investing activities               320,733             (335,688 )
Net cash provided by financing activities                          15,875              435,554

Net increase in cash, cash equivalents and restricted cash $ 313,704

$ 76,412




Cash Used in Operating Activities
Our largest source of operating cash is cash collections from organizations on a
paid subscription plan. Our primary uses of cash from operating activities are
for employee-related expenditures, sales and marketing expenses, and third-party
hosting costs. Historically, we have generated negative cash flows from
operating activities and have supplemented working capital requirements through
net proceeds from the private sale of equity securities.
During the nine months ended October 31, 2019, operating activities used $22.9
million in cash. The primary factors affecting

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our operating cash flows during this period were our net loss of $479.3 million,
impacted by $380.6 million non-cash charges and $75.7 million of cash provided
from changes in our operating assets and liabilities. The non-cash charges
primarily consisted of $363.3 million in stock-based compensation, $20.4 million
of depreciation and amortization, and $5.5 million of amortization of deferred
contract acquisition costs, partially offset by a $5.8 million gain as a result
of the change in fair value of our strategic investments and a $2.1 million gain
of net amortization of bond discounts on debt securities available for sale. The
cash provided from changes in our operating assets and liabilities was primarily
due to a $62.1 million increase in deferred revenue due to additional billings
with new and existing Paid Customers and a $20.9 million increase in accrued
expenses and other liabilities as a result of our increased spending and
headcount associated with the growth of our business. These amounts were
partially offset by a $12.0 million increase in prepaid expenses and other
assets.
During the nine months ended October 31, 2018, operating activities used $23.5
million in cash. The primary factors affecting our operating cash flows during
this period were our net loss of $104.3 million, impacted by $32.3 million
non-cash charges and $48.6 million of cash provided from changes in our
operating assets and liabilities. The non-cash charges primarily consisted
of $18.3 million in stock-based compensation, $11.2 million of depreciation and
amortization, a $2.2 million loss on disposal of property and equipment, and
$2.0 million of amortization of deferred contract acquisition costs, partially
offset by $1.6 million of net amortization of bond discount on debt securities
available for sale. The cash provided from changes in our operating assets and
liabilities was primarily due to a $64.7 million increase in deferred revenue
due to increased billings and a $34.2 million increase in accounts payable,
accrued expenses including compensation and benefits, and other liabilities as a
result of our increased spending and headcount associated with the growth of our
business. These amounts were partially offset by a $38.1 million increase in
prepaid expenses and other assets mainly due to increases in prepaid hosting
services and deferred commissions, and a $12.3 million increase in accounts
receivable, as a result of increased billings.
Cash Provided by (Used in) Investing Activities
Net cash provided by investing activities during the nine months ended
October 31, 2019 was $320.7 million, which was primarily driven by sales and
maturities of marketable securities of $568.3 million, partially offset by cash
used to purchase marketable securities of $202.9 million, property and equipment
of $38.3 million, and strategic investments of $9.3 million.
Net cash used in investing activities during nine months ended October 31, 2018
was $335.7 million, which was primarily used to purchase marketable securities
of $734.8 million, business and intangible assets of $47.7 million, property and
equipment of $42.7 million, and strategic investments of $1.6 million, partially
offset by sales and maturities of marketable securities of $490.6 million.
Cash Provided by Financing Activities
Net cash provided by financing activities for the nine months ended October 31,
2019 was $15.9 million, primarily driven by the exercise of stock options to
purchase common stock of $11.6 million, proceeds from employee purchases of
common stock under the employee stock purchase plan, or the ESPP, of $7.4
million, and capital contributions from noncontrolling interest holders of $3.8
million, partially offset by a payment of contingent consideration for an
acquisition of $5.0 million and distributions to noncontrolling interest holders
of $1.4 million.
Net cash provided by financing activities for the nine months ended October 31,
2018 was $435.6 million, reflecting proceeds from issuance of convertible
preferred stock of $426.9 million, proceeds from issuance of common stock to a
third party of $6.1 million, and the exercise of stock options to purchase
common stock of $2.6 million.
                    Contractual Obligations and Commitments
Our principal contractual commitments primarily consist of obligations under
leases for office space and datacenter operations. For additional information of
operating lease obligations and hosting commitments, refer to Note 6 to our
unaudited condensed consolidated financial statements included elsewhere in this
Quarterly Report on Form 10-Q. There has been no material change in our
contractual obligations and commitments other than non-cancelable purchase
commitments primarily related to IT operations, sales and marketing
activities, and acquisition related obligations in the ordinary course of
business since our fiscal year ended January 31, 2019. See our Prospectus for
additional information regarding the Company's contractual obligations.
                         Off-Balance Sheet Arrangements

As of October 31, 2019, we did not have any relationships with unconsolidated entities or financial partnerships, such as structured finance or special purpose entities that were established for the purpose of facilitating off-balance sheet arrangements or other purposes.


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                   Critical Accounting Policies and Estimates
Critical accounting policies and estimates are those accounting policies and
estimates that are both the most important to the portrayal of our net assets
and results of operations and require the most difficult, subjective or complex
judgments, often as a result of the need to make estimates about the effect of
matters that are inherently uncertain. These estimates are developed based on
historical experience and various other assumptions that we believe to be
reasonable under the circumstances. Critical accounting estimates are accounting
estimates where the nature of the estimates are material due to the levels of
subjectivity and judgment necessary to account for highly uncertain matters or
the susceptibility of such matters to change and the impact of the estimates on
financial condition or operating performance is material.
Our significant accounting policies are discussed in "Notes to Consolidated
Financial Statements - Note 1. Description of Business and Summary of
Significant Accounting Policies" in the Prospectus. There have been no material
changes to our critical accounting policies and estimates as compared to the
critical accounting policies and estimates discussed in the Prospectus.
                        Recent Accounting Pronouncements

See Note 1 of the notes to our condensed consolidated financial statements included elsewhere in this Quarterly Report on Form 10-Q for more information.


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