# OpenSea

> OpenSea is a Miami-headquartered, non-custodial marketplace and trading interface for onchain assets. Founded in 2017 as an NFT marketplace, it now lets consumers, collectors, creators and traders discover, mint, buy and sell NFTs, swap fungible tokens, follow portfolios and access other trading products across 27 blockchains on web and mobile, while users retain control of their wallets.

- **Founded:** 2017
- **Headquarters:** Miami, United States
- **Founders:** Devin Finzer (CEO and Co-Founder), Alex Atallah (Co-Founder and Board Member)
- **Team size:** Approximately 710 employees in supplied company data; OpenSea currently describes itself publicly as a lean, remote-first team
- **Products:** OpenSea Marketplace, Seaport, OpenSea Pro, OpenSea Studio, OS2
- **Notable:** Pioneered the first non-custodial peer-to-peer NFT marketplace in 2017., Joined Y Combinator's Winter 2018 batch., Surpassed $10 billion in cumulative volume during the 2021 NFT boom.

## Products & services

- **OpenSea Marketplace** — Non-custodial discovery, buying, selling and collection management for NFTs and other onchain assets.
- **Seaport** — Open-source marketplace protocol for safely and efficiently creating and fulfilling NFT orders.
- **OpenSea Pro** — Professional NFT trading experience built from the Gem acquisition, including marketplace aggregation and advanced tools.
- **OpenSea Studio** — No-code tools for creators to mint NFTs, deploy contracts, manage collections and launch drops.
- **OS2** — Ground-up marketplace rebuild combining NFTs and fungible tokens, aggregated listings, improved discovery and cross-chain purchasing.
- **OpenSea Mobile** — iOS and Android experience for portfolios, social feeds and trading tokens, NFTs and supported derivatives across 27 chains.

## Achievements

- Pioneered the first non-custodial peer-to-peer NFT marketplace in 2017.
- Joined Y Combinator's Winter 2018 batch.
- Surpassed $10 billion in cumulative volume during the 2021 NFT boom.
- Reports more than 2 million collections, more than 80 million NFTs and over $20 billion in total volume.
- Raised $300 million at a $13.3 billion post-money valuation in January 2022.
- Released the open-source Seaport marketplace protocol and later Seaport 1.6.
- Rebuilt its core marketplace as OS2 and expanded into fungible-token trading.
- Launched a mobile experience supporting 27 chains in July 2026.

## Latest updates

- **2026-07** — Launched OpenSea Mobile on iOS and Android with portfolio, social feed and trading access across 27 supported chains.
- **2026-07** — Added Robinhood Chain support, including access to stock-linked tokens for eligible regions.
- **2025-11** — Became an official Art Basel Miami Beach partner supporting the Zero 10 digital-art initiative.
- **2025-06** — Began winding down the legacy OS1 experience after OS2 exited beta.
- **2025-05** — Released OS2 publicly with full token trading, cross-chain tools and Voyages rewards.
- **2025-02** — The U.S. SEC closed its investigation into OpenSea without bringing an enforcement action.

## Links

- Website: https://opensea.io
- LinkedIn: http://www.linkedin.com/company/opensea-io
- Twitter/X: https://x.com/opensea
- GitHub: https://github.com/ProjectOpenSea
- YouTube: https://www.youtube.com/OpenSeaTV
- Instagram: https://instagram.com/opensea
- Facebook: https://facebook.com/projectopensea/

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Profile page: https://yespress.io/opensea
Published by YesPress — https://yespress.io
Last updated: 2026-08-12