Fireworks AI seeks new funding, targeting a $30-40 billion valuation

Fireworks AI develops and rents out the computing systems and software tools that businesses use to run, fine-tune, and deploy both open-weight and custom AI models. The company distinguishes itself by focusing on what it calls “specialized intelligence,” tailoring AI models to clients’ proprietary data, workflows, and specific use cases, rather than building a consumer-facing chatbot to rival ChatGPT.

Demand for AI infrastructure solutions has soared as companies seek to harness generative AI technologies. In July, Fireworks AI revealed that it had surpassed $1 billion in annualized revenue, serving more than 40 trillion tokens per day, with 95 percent of activity attributed to customer-specific models. The firm’s clientele ranges from startups fine-tuning open models to larger enterprises integrating AI directly into their operations.

Fireworks has become a magnet for top-tier investors. Its $1.5 billion Series D round this July was led by Atreides Management, Index Ventures, and TCV and included participation from Nvidia, Lightspeed Venture Partners, Bessemer Venture Partners, and Menlo Ventures. The prior Series C, in late 2025, brought in $250 million at a $4 billion valuation, co-led by Lightspeed, Index, and Evantic.

The current funding talks come as Fireworks AI has been navigating the aftermath of a security incident. Earlier this month, the company reported discovering unauthorized use of internal credentials that allowed an intruder to access data from some customer accounts. Chief executive Lin Qiao, who previously led the PyTorch team at Meta, wrote on X that the company is committed to transparency and to turning the episode into “the most formidable security response in AI Infra.” Fireworks declined to comment further on both the security matter and the fundraising process.

Fireworks operates in a fiercely competitive sector, facing challenges from other model-infrastructure startups such as Together AI, Baseten, and Replicate, as well as from tech giants like Amazon Web Services, Google Cloud, Microsoft Azure, and Oracle. The company’s plans for a new funding round, first reported last month by The Information, have not been finalized, and valuation targets may still change as discussions continue.

Still, the staggering jump in valuation highlights the ongoing excitement surrounding AI infrastructure providers, even as operational and security challenges persist. Investors are betting that companies like Fireworks AI will remain critical to the booming adoption of artificial intelligence across industries.