OpenSea

OpenSea is the world's first peer-to-peer marketplace for NFTs, fungible tokens, and other on-chain assets. Founded in December 2017 by Devin Finzer and Alex Atallah — and now headquartered in Miami — OpenSea pioneered the non-custodial marketplace model that has since defined the entire NFT industry.

What began as a small marketplace inspired by CryptoKitties grew into a multi-network platform where you can discover, buy, sell, and create digital art, PFPs, gaming items, music, sports collectibles, membership passes, domains, and now fungible tokens — all from a single self-custodial interface.

In 2025, OpenSea launched OS2, a major platform upgrade that brings NFTs and fungible tokens together for the first time. OS2 added cross-chain purchasing — buy an asset on one chain using funds on another without manually bridging — and aggregated listings drawn from marketplaces and decentralized exchanges across the entire ecosystem.

At its 2021 peak OpenSea was valued at over $13 billion. Today it operates across 19+ blockchains — including Ethereum, Polygon, Solana, Arbitrum, Optimism, Base, Avalanche, BNB Chain, Klaytn, Ronin, Flow, and ApeChain — with more added regularly. Individual legacy collections like CryptoPunks alone have done over $3.8 billion in lifetime volume on the platform.

OpenSea is fully non-custodial: OpenSea never holds or controls users' assets. Trades are settled peer-to-peer through your wallet, and your private keys stay yours. Major wallets including MetaMask, Coinbase Wallet, Phantom (Solana), Ledger, Trust, and any WalletConnect-compatible wallet are supported.

Whether you're a casual collector browsing PFP collections, a serious trader hunting for liquidity across Ethereum, Solana and L2s, or a creator auctioning your 1-of-1 work, OpenSea remains the broadest, best-known single destination in the onchain economy.

OpenSea keeps its fee structure simple. There are no listing fees and no account-setup fees; OpenSea earns a small percentage on every sale.

Gas fees on each chain are paid by whoever triggers the transaction. Lazy minting lets creators mint NFTs without paying upfront gas — OpenSea mints the item only when it first sells, and the buyer pays the resulting gas fee at that moment. The cross-chain purchase feature can swap funds from another chain to complete a buy without the user manually bridging — bridge fees apply and are surfaced in the transaction preview.

Cross-chain and aggregated liquidity

OS2 unifies NFTs and fungible tokens into one trading experience, aggregating listing inventory from major marketplaces and DEXs across the entire ecosystem. Cross-chain purchasing lets you buy an asset on one network from your wallet balance on another chain — no manual bridging step required.

Non-custodial by design

Your assets live in your own wallet. OpenSea uses wallet-proxy signatures so every transaction requires your explicit authorization, and OpenSea never custodies your funds or your NFTs.

Creator tools

Create and launch collections, sell via fixed-price, English-auction, or Dutch-auction listings, set your own creator royalty, run pre-mint and allowlist drops, and bundle items for sale. Lazy minting makes it free for creators to get started — the buyer pays gas only when the NFT first sells.

Discover experience

OpenSea's discovery feed is split into All, Gaming, Art, PFPs, Physical Collectibles, Music, Sports, and Domains. OS2's Trending Tokens and curated Featured Collections panels make the platform a real-time market pulse for the wider onchain economy.

Wallet and fiat support

Works with MetaMask, Coinbase Wallet, Phantom (Solana), Trust, Rainbow, Ledger, and any WalletConnect-compatible wallet. A built-in MoonPay on-ramp lets users buy crypto with a credit card directly inside the marketplace.