BERLIN, July 22 (Reuters) - Index Ventures said on Thursday it had raised $3.1 billion from investors, stepping up the scale of its operations amid a record-breaking boom in venture capital funding, after pulling in $2 billion last year.

Index said it would commit $900 million of the money raised to early-stage investments and $2 billion to growth-stage bets, in addition to $200 million in seed funding that has already been announced.

London-based Index, which was founded in 1996, has backed several firms that recently went public, including Deliveroo , Trustpilot, Wise, Roblox and Confluent.

It has also invested in stock trading app Robinhood, which has announced its intention to float in New York and is seeking a valuation of $35 billion. (Reporting by Douglas Busvine, editing by Kirsti Knolle)