Gamma.io is a Bitcoin NFT marketplace, powered by Stacks, which enables smart contracts that settle onto Bitcoin. Gamma offers an open marketplace for Bitcoin NFTs, a creator launchpad for 100% creator-owned Ethereum, and a social platform that brings together creators and collectors in a web3-native way. Gamma's user profiles allow collectors to combine multiple Stacks and Ethereum wallets on one page to showcase all their NFTs, and share profiles based on decentralized identity.