Circle is a financial technology (fintech) company founded in 2013 by Jeremy Allaire and Sean Neville. It is primarily known for being the originator of the stablecoin USD Coin (USDC), a digital currency whose value is dedicated to replicating the US dollar. Thanks to its stability, the USDC is widely used in the cryptosphere for its advantages in terms of speed and lower transaction costs compared to traditional currencies.

Circle's stated mission is to facilitate the adoption of digital currencies and improve the efficiency of financial transactions worldwide. To do so, the company offers various blockchain-based products and services, such as Circle Account, Circle Pay and Circle APIs, which allow businesses and individuals to conduct digital currency transactions.

In addition to USDC, Circle is also involved in other blockchain and cryptocurrency-related projects, such as developing decentralized protocols, investing in innovative startups and promoting education and research on blockchain technologies. The company works closely with other major industry players, such as Coinbase and the Centre consortium, to ensure regulatory compliance and security of the USDC.