Gemini is a U.S.-based cryptocurrency exchange and custodian bank founded by Cameron and Tyler Winklevoss in 2014. It offers a secure platform for buying, selling, trading, and storing over 70 cryptocurrencies and supports both retail and institutional clients. The platform emphasizes regulatory compliance and robust security, including offline cold storage, insurance coverage, and trust licensing. Gemini also provides services such as custody solutions, a payments app, staking, and its own stablecoin.