Devin Finzer is the co-founder and CEO of OpenSea — launched in December 2017 as one of the first permissionless NFT marketplaces and growing to become the world’s highest-volume NFT marketplace during the 2021 NFT boom, reaching $3+ billion in monthly trading volume, processing over $20B cumulative volume by 2022, and achieving a $13.3 billion venture valuation in January 2022 — before declining sharply as NFT prices collapsed in 2022–2023 and Blur (a competitor focused on professional traders) captured the majority of Ethereum NFT volume by early 2023.
Background
Devin Finzer studied computer science at Brown University. Before OpenSea, he worked as a software engineer at Google and Pinterest, and later co-founded Claimdog (acquired by Credit Karma in 2015). His background in consumer products and engineering informed OpenSea’s early focus on user experience.
He met Alex Atallah (his CTO co-founder) in the San Francisco tech community. Together they entered the inaugural Y Combinator batch in 2018 for a crypto startup, where OpenSea was developed and launched.
OpenSea
Founded: December 2017 (officially launched as a consumer marketplace)
Model: Permissionless peer-to-peer NFT marketplace — anyone can list and buy NFTs without applying for listing approval; 2.5% creator fee (standard model).
Key milestones:
- 2021 (August) — 200,000+ ETH daily volume; monthly volume tops $3B during peak Bored Ape Yacht Club era.
- January 2022 — Series C raises $300M at $13.3B valuation from Paradigm and Coatue.
- 2022 (February) — Wyvern protocol exploit after OpenSea migration; ~600 ETH (~$1.7M) drained from users’ accounts.
- 2022 — NFT market collapse; volume falls 90%+ from peaks.
- 2023 — Blur launches with BLUR token airdrop incentivizing high-volume traders; Blur captures 50%+ of Ethereum NFT market share.
Strategic Response to Blur:
As Blur gained market share, OpenSea controversially reduced creator royalty enforcement — allowing 0% royalties — to stay competitive with Blur’s model. This drew significant pushback from NFT creators who relied on royalties as ongoing income. OpenSea later reversed some royalty policies.
OpenSea 2.0 / Seaport:
OpenSea open-sourced its core marketplace smart contract infrastructure as “Seaport” — enabling other marketplaces and aggregators to use OpenSea’s order book format. This was both a strategic move to embed OpenSea’s infrastructure broadly and a response to the decentralized marketplace trend.
Legal Challenges
OpenSea faced multiple legal and operational challenges:
- Insider trading case (2022) — An OpenSea employee (Nathaniel Chastain, head of product) was charged with and convicted of wire fraud and money laundering for using advance knowledge of NFT featured listings to buy and sell those NFTs for profit ahead of their public appearance. This was the first NFT-related insider trading prosecution.
- SEC investigation — OpenSea disclosed in 2023 it received a Wells notice from the SEC investigating whether some NFTs on its platform are unregistered securities.
Key Dates
- December 2017 — OpenSea founded.
- 2018 — Y Combinator cohort; seed funding.
- August 2021 — NFT boom peak volume; BAYC floor price ATH.
- January 2022 — $300M Series C at $13.3B valuation.
- 2022 (February) — Wyvern exploit; ~600 ETH stolen.
- 2022 — NFT market collapses 90%+.
- 2023 — Blur market share exceeds OpenSea on Ethereum.
- 2023 — SEC Wells notice disclosed.
Common Misconceptions
- “OpenSea minted the NFTs on its platform.” — OpenSea is a marketplace, not an NFT creator. NFT projects mint their tokens through their own smart contracts; OpenSea provides the marketplace infrastructure.
- “OpenSea’s high valuation reflects sustainable business model.” — The $13.3B valuation was set at the peak of the NFT bull market; subsequent revenue collapse made this valuation unsustainable.
Last updated: 2026-04