Fireworks AI

Compute & inference infrastructure · https://fireworks.ai

Verdict: Buy · Confidence: medium · Reviewed 2026-10-15

Fireworks runs inference, including custom models. On July 15, 2026 the company said it raised a $1.505 billion Series D at a $17.5 billion valuation and had surpassed $1 billion in annualized revenue run rate, serving more than 40 trillion tokens a day. Reuters reported the round as $1.51 billion at $17.5 billion and said the company described the run rate as up fivefold year over year. An October 2025 company post said a $250 million Series C at a $4 billion valuation came with annualized revenue above $280 million. No gross margin was found. CNBC reported the CEO said Cursor was once about half of revenue and that the base has since broadened.

Rubric

Dimension	Score (1–5)	Notes & sources
Real customers & revenue quality Are there named paying customers, recurring revenue, and retention evidence?	5/5	Per Fireworks, annualized revenue run rate surpassed $1 billion, with Cursor and Harvey named as customers. Per the October 2025 company post, annualized revenue had surpassed $280 million and the platform powered over 10,000 companies. Reuters attributed the fivefold year-over-year increase to the company. Announcing our Series D and $1B ARR (accessed 2026-10-15) Nvidia-backed startup Fireworks valued at $17.5 billion (accessed 2026-10-15) Fireworks Raises $250M Series C (accessed 2026-10-15)
Unit economics Do gross margins survive inference/compute costs? Is pricing durable?	Unknown	Unknown — no public figure found.
Moat Proprietary data, distribution, switching costs, or tech that is hard to copy?	3/5	Per Fireworks, more than 95 percent of tokens come from models specialized on customer data. That workload can be sticky. The underlying GPUs and open weights are available to rivals, and no margin was disclosed. Announcing our Series D and $1B ARR (accessed 2026-10-15)
Platform risk Could a model provider or incumbent ship this as a feature? (higher score = lower risk)	3/5	Fireworks competes with other inference clouds and with hyperscalers. Reuters lists Together AI and Baseten as competitors. Specialization helps, and a lab or cloud can still host the same pattern. Nvidia-backed startup Fireworks valued at $17.5 billion (accessed 2026-10-15)
Team & execution Shipping cadence, leadership track record, stability.	4/5	The company published a revenue milestone with the Series D and had previously published a $280 million annualized-revenue figure with the Series C. No CEO departure was found in those posts. Announcing our Series D and $1B ARR (accessed 2026-10-15) Fireworks Raises $250M Series C (accessed 2026-10-15)
Funding vs. traction Is capital raised justified by verifiable traction?	4/5	Company-stated scale went from over $280 million annualized revenue at a $4 billion valuation in October 2025 to over $1 billion run rate at a $17.5 billion valuation in July 2026, with $1.505 billion raised. The multiple is rich and the revenue is at least disclosed by the company. Announcing our Series D and $1B ARR (accessed 2026-10-15) Fireworks Raises $250M Series C (accessed 2026-10-15)
Hype signals Demo-driven marketing, vague metrics, valuation outrunning evidence? (higher score = fewer red flags)	3/5	Per CNBC, CEO Lin Qiao said Cursor once accounted for about half of revenue and that the mix has broadened, without a new concentration percentage. Valuation stepped up sharply with the disclosed revenue. Fireworks hits $17.5 billion valuation and $1B in annualized revenue (accessed 2026-10-15)

Listing source: https://fireworks.ai. Revenue, users, and valuation figures appear only when publicly sourced; otherwise they are marked unknown.