OpenSea is an American online non-fungible token (NFT) marketplace headquartered in New York City. The company was founded by Devin Finzer and Alex Atallah in 2017. OpenSea offers a marketplace allowing for non-fungible tokens to be sold directly at a fixed price, or through an auction, based on the Ethereum ERC-721 standard, the layer-2 scaling solution for Ethereum Polygon, the KIP-7 standard for Klaytn, and the SPL standard for Solana. In 2021, following a heightened interest in non-fungible tokens, the company’s revenue reached $95 million in February 2021 and $2.75 billion in September of that year. By January 2022, the company had been valued at $13.3 billion and has been considered the largest non-fungible token marketplace. The daily trading volume on the OpenSea marketplace reached a record $2.7 billion on May 1, 2022, but four months later had dropped by 99%.
