OpenSea

Founded in 2017 by Devin Finzer and Alex Atallah, OpenSea is a decentralized, peer-to-peer marketplace for buying, selling, and discovering non-fungible tokens (NFTs) and other crypto collectibles. It provides a platform for creators to launch new digital works (minting) and for collectors to trade these assets across various blockchains, including Ethereum, Polygon, and Solana. The company's mission is to build a more open and user-owned digital economy, where users have true ownership of their digital items.