Andreessen Horowitz led an approximately $870 million Series A for San Francisco startup TypeSafe AI, the company announced on October 9, 2026, valuing the business at $7.5 billion.
The funding round comes fewer than four weeks after TypeSafe AI exited stealth. On September 15, 2026, the company disclosed a $40 million seed round led by DCVC at a post‑money valuation of about $200 million, meaning the Series A marked a jump from a nine‑figure valuation to a ten‑figure one inside a single month.
The immediate catalyst for investor interest was the company’s first model, called Jev. A launch video went viral, and Jev reportedly passed one million users within days. According to research findings on the round, adoption has moved beyond curious developers: Jev is now used by around one‑third of Fortune 500 companies.
TypeSafe AI’s rapid rise and leadership
TypeSafe AI was founded in 2024. Its leadership team includes CEO Diogo Almeida, CTO Erik Gafni and COO Sasha Sheng, whose backgrounds span OpenAI, Google Brain and Meta FAIR. Co‑founder Diogo Almeida has pointed to the speed of adoption as the driver behind the funding momentum, saying uptake drew interest from enterprise executives and developers and in turn attracted investor attention.
What Jev does
Jev executes what the company calls “typed questions”: queries that produce a structured, predictable output format designed to plug directly into software rather than a chat interface. The output is intended to be consumed by code so a program can act on a decision without a human parsing prose first. The model delivers outputs with latency under 100 milliseconds and is positioned as cheaper to run than general‑purpose large language models.
There is reported early investor interest in a potential follow‑on round of more than $1 billion at a valuation above $10 billion after the Jev launch.
