The Idea: In late 2017, Alex Atallah and Devin Finzer watched CryptoKitties - a quirky blockchain game about collecting digital cats - captivate the crypto world. While everyone else saw a fun toy, they saw something bigger: an entire economy of unique digital assets with no marketplace to trade them. The NFT market barely existed. Total trading volume across all platforms was negligible, and most people had never heard the term "non-fungible token." But Atallah, a Stanford CS grad who'd cut his teeth at Palantir, bet that digital ownership would become massive. The pair decided to build the eBay for NFTs. Neither had marketplace experience. Neither had raised venture capital before. This was the beginning of OpenSea.
The Execution:
- 2018: Accepted into Y Combinator with a $120K pre-seed check, giving them early validation when most investors thought NFTs were a joke.
- November 2019: Raised a $2.1M seed round - modest by crypto standards, but enough to keep building through the quiet years.
- March 2021: Closed a Series A led by Andreessen Horowitz as NFTs exploded into the mainstream. Beeple's $69M digital art sale put the category on the map overnight.
- July 2021: Raised a $100M Series B at a $1.5B valuation. Monthly trading volume had reached $3.4 billion. The platform went from thousands of users to hundreds of thousands in months.
- January 2022: Raised $300M at a $13.3B valuation from Paradigm and Coatue. OpenSea had processed over $10 billion in total volume and was the undisputed king of NFT trading.
- July 2022: Atallah stepped down from day-to-day operations to "build something from zero to one" - leaving before the NFT market crashed over 90% from its peak.
- 2023: Founded OpenRouter with Louis Vichy - a unified API that gives developers access to hundreds of AI models through a single endpoint. Same pattern: find the infrastructure gap before anyone else.
- April 2025: OpenRouter raised a $40M across seed and Series A from a16z, Menlo Ventures, and Sequoia at a $500M valuation. Annualised inference spend crossed $100M - up 10x from just months earlier - with over a million developers on the platform.
The Lesson: Atallah's superpower isn't picking the right market - it's recognising infrastructure gaps before anyone else sees them. He saw that NFTs needed a marketplace when nobody was trading them, and he saw that AI needed a model routing layer when everyone else was building apps on top of single providers. The best founders don't chase trends. They build the picks and shovels while everyone else is still digging.