Funding round
Fireworks AI Series C
Fireworks AI, which works in generative AI model development in San Mateo, raised $250M in a Series C round announced on 28 Oct 2025, led by Lightspeed Venture Partners, Index Ventures and Evantic, at a $4.00B post-money valuation. 4 firms took part. It is Fireworks AI's third venture round on record; the one before was a Series B in Jul 2024.
$250M
Amount raised
$4.00B
Post-money valuation
$3.75B pre-money
4
Investors
3 leads
7.2x
Step-up from the Series B
$552M in Jul 2024
6.3%
Stake sold
new money over the post-money
Valuation
What this round says about the price
This round priced Fireworks AI at $4.00B after the new money, 7.2 times the $552M of its Series B (Jul 2024). The $250M bought investors about 6.3% of the company. It came 15 months after Fireworks AI's Series B. It is 14% of the $1.83B Fireworks AI has raised in the venture rounds on record. Fireworks AI raised again 9 months later: a Series D round of $1.50B in Jul 2026, at $17.50B post-money.
Fireworks AI's funding rounds
Fireworks AI has 4 venture rounds on record. This one is highlighted.
- Series A 27 Mar 2024, led by Benchmark $25M
- Series B 11 Jul 2024, led by Sequoia Capital $52M$552M post-money
- Series C this round 28 Oct 2025, led by Lightspeed Venture Partners, Index Ventures and Evantic $250M$4.00B post-money
- Series D 15 Jul 2026, led by Atreides Management, Index Ventures and Technology Crossover Ventures $1.50B$17.50B post-money
Investors
Who put money in
Lightspeed Venture Partners, Index Ventures and Evantic led the round with 1 other firm.
Lead investors
- Lightspeed Venture Partners backs 454 venture-backed companies new investor
- Index Ventures backs 353 venture-backed companies new investor
- Evantic new investor
Also in the round
- Sequoia Capital backs 589 venture-backed companies new investor
Use of proceeds
What the money is for
According to the announcement, the money goes to hiring, product development, geographic expansion, sales and marketing, scaling operations and working capital.
- Hiring
- Product development
- Geographic expansion
- Sales and marketing
- Scaling operations
- Working capital
Comparable rounds
How it compares
267 Series C rounds in Tech Companies within a year either side disclosed an amount; the median was $60M, and this round was 4.2 times the median. The closest in time, other companies' Series C rounds in Tech Companies:
| Company | Announced | Amount | Post-money | Led by |
|---|---|---|---|---|
| OpenEvidence Tech Companies | 20 Oct 2025 | $200M | $6.00B | GV |
| Tech Companies | 9 Oct 2025 | $180M | $2.50B | Accel |
| Tech Companies | 14 Oct 2025 | $165M | not disclosed | Eurazeo |
| Legora Tech Companies | 30 Oct 2025 | $150M | $1.80B | Bessemer Venture Partners |
| Tech Companies | 28 Oct 2025 | $150M | $926M | Georgian |
| Tech Companies | 22 Oct 2025 | $70M | $1.50B | Avenir |
| Tech Companies | 14 Oct 2025 | $58M | not disclosed | not named |
| Tech Companies | 20 Oct 2025 | $55M | $525M | Spark Capital |
Sources
Where this comes from
Reported by 3 sources.
Questions
Frequently asked
How much did Fireworks AI raise in its Series C round?
Fireworks AI raised $250M in its Series C round, announced in Oct 2025.
Who led Fireworks AI's Series C round?
Lightspeed Venture Partners, Index Ventures and Evantic led it, with Sequoia Capital.
What was Fireworks AI's valuation at the Series C round?
$4.00B post-money ($3.75B pre-money).
How does it compare with other Series C rounds in Tech Companies?
267 Series C rounds in Tech Companies within a year either side disclosed an amount; the median was $60M, and this round was 4.2 times the median.
Did Fireworks AI raise again after this round?
Yes: a Series D round in Jul 2026 of $1.50B at $17.50B post-money.