Fireworks raised $1.5bn on a bet that companies will build AI, not rent it

https://media.thenextweb.com/2026/07/Fireworks_team.avif

The AI economy has run on a simple habit: rent a model from a big lab. Fireworks just raised $1.5bn to argue the opposite, that every company will build intelligence of its own.

The Series D values the San Mateo startup at $17.5bn, it said. Atreides Management, Index Ventures, and TCV led the round. Nvidia, an existing backer, joined again.

“Fireworks has assembled one of the most elite and technical teams in AI,” said Gavin Baker, Atreides’ managing partner, in the funding announcement.

What Fireworks sells

Fireworks runs open models for other companies, then helps them tune those models on their own data. It calls the result “specialized intelligence”: a model shaped by the knowledge only one business holds.

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