Founded by Devin Finzer and Alex Atallah in 2017, OpenSea is a decentralized marketplace for the purchase and sale of NFTs. Users can buy, collect, trade and gift NFTs on the marketplace. Developers can run an in-app economy with OpenSea.js, run their own marketplace and access the OpenSea API for data on sales, listings, bids and transfers. The platform has one of the lowest commission fees for purchasing and selling NFTs. To date, OpenSea has raised over $427M with their most recent Series C raise capturing $300M from investors including Coatue and Paradigm.