Fireworks AI raises $1.5B Series D at $17.5B valuation
What's the deal? Fireworks AI has raised $1.505 billion in a Series D round at a $17.5 billion valuation, led by Atreides ManagementDealroom has a profile for this one. Try Dealroom →, Index Ventures, and TCV. Evantic CapitalDealroom has a profile for this one. Try Dealroom →, Lightspeed Venture Partners, Nvidia, 20VC, Bessemer Venture Partners, and Menlo Ventures also participated.
What does it do? Fireworks helps companies turn general-purpose AI models into specialised intelligence trained on their own data, then runs it at scale on its inference stack. It pitches frontier-quality performance "at a fraction of the cost."
By the numbers: The company has surpassed $1 billion in annualised revenue run rate and now serves more than 40 trillion tokens a day. More than 95% of those tokens come from models tuned on customers' proprietary data.
What's the endgame? Fireworks will use the money to expand its compute infrastructure and grow its engineering team. Customers include CursorDealroom has a profile for this one. Try Dealroom →, which builds coding models, and legal AI firm Harvey.
Why now? As open models close the gap with closed frontier systems, Fireworks argues companies can own and customise the intelligence behind their products rather than rent it. "Companies are no longer renting general intelligence. They're building their own," it said.
The signal: The raise reflects a shift in AI spending toward specialisation and inference — running and fine-tuning models on proprietary data — rather than relying solely on general-purpose systems from a handful of frontier labs.
Read more: Fireworks AI
