Devin Finzer is the co-founder and CEO of OpenSea — the NFT and onchain trading marketplace that became the dominant platform for buying, selling and discovering non-fungible tokens. Finzer co-founded OpenSea with Alex Atallah in 2017 and participated in Y Combinator's W18 batch. By 2025–2026, OpenSea has expanded its strategy beyond pure NFT trading toward broader onchain token and asset exchange, positioning itself as an 'exchange everything' platform.
Co-Founder Attribution: Alex Atallah must be credited as OpenSea's co-founder. His historical contribution is material regardless of any subsequent change in day-to-day operational role.
Education & Early Career
Finzer holds a Bachelor of Science degree in Computer Science and Mathematics from Brown University. After Brown, he worked as a software engineer at Pinterest. He co-founded Claimdog, a service for finding unclaimed property, which was acquired by Credit Karma. Exact dates for these roles have been reported in secondary sources; primary corporate record confirmation was not available for this profile.
Founding OpenSea (2017)
Finzer and Atallah founded OpenSea in 2017 during the early days of NFT experimentation on Ethereum. The platform originally launched as a marketplace for CryptoKitties and other early Ethereum-based collectibles. It subsequently grew into the primary marketplace for NFTs during the 2020–2021 boom, processing billions in trading volume.
OpenSea Today (2026)
OpenSea's 2025–2026 strategy, which Finzer has described publicly, expands the platform beyond NFTs toward aggregating and trading onchain tokens and digital assets across multiple blockchains. The OS2 platform architecture reflects this broader scope. OpenSea's Seaport protocol — an open-source, gas-efficient NFT marketplace protocol — was developed by the broader OpenSea engineering team and the open-source community, not solely by Finzer.
SEA Token: OpenSea has announced plans for a SEA governance token and associated Foundation. The launch status, exact token utility, governance structure, and relationship between the OpenSea company and any SEA Foundation must be verified from current opensea.io announcements before being cited as live. Do not present announced features as live until confirmed.
SEC Investigation: In 2023, the SEC issued a Wells Notice to OpenSea, indicating potential enforcement action relating to NFTs as securities. In early 2025, OpenSea publicly announced that the SEC had closed its investigation without enforcement action. Verify current regulatory status from official SEC and OpenSea sources.
Founder Snapshot
| Field | Detail |
|---|---|
| Name | Devin Finzer |
| Primary Project/Company | OpenSea |
| Founder Type | Co-Founder |
| Current Role | Co-Founder & CEO, OpenSea |
| Co-Founder | Alex Atallah |
| Founded | 2017 (Y Combinator W18) |
| Primary Sector | NFT & Onchain Trading Infrastructure |
| Information Checked | August 2026 |
Key Contributions
Co-Founded OpenSea (2017)
Co-built the platform that became the primary marketplace for NFTs and onchain digital assets, enabling permissionless peer-to-peer trading of Ethereum and multi-chain tokens.
Seaport Protocol
Led OpenSea's team in delivering the Seaport open-source marketplace protocol — a gas-efficient, flexible NFT trading contract adopted by the broader ecosystem.
'Exchange Everything' Pivot (2025–2026)
Steered OpenSea's strategic expansion beyond NFTs toward broader onchain token aggregation and trading, with the OS2 platform architecture.
NFT Market Infrastructure
OpenSea's early marketplace infrastructure helped establish industry standards for ERC-721/ERC-1155 token trading, creator royalties, and onchain asset discovery.
SEC Engagement
Publicly contested the SEC's Wells Notice (2023) and the closure of the SEC investigation without enforcement action (2025) established important regulatory precedent for NFT platform treatment.
Sources & Verification
Sources: opensea.io · opensea.io/blog. Information last checked: August 2026.
