Fal and Fireworks AI, inference-optimized compute platforms, explore new funding rounds as AI inference valuation multiples surge.

Two of the fastest-growing companies in AI infrastructure are exploring funding rounds that could double their valuations. Fal, a multimodal model hosting platform, and Fireworks AI, which specializes in open-source model inference, are each on track for significantly larger raises.

Fal secured $140 million in a Series D round in December 2025, led by Sequoia, at a $4.5 billion valuation. By March 2026, the company was targeting a $300 to $350 million raise at an estimated $8 billion valuation.

Fireworks AI has moved even faster. The company raised $250 million at a $4 billion valuation in October 2025. In July 2026, Fireworks closed a $1.505 billion Series D, valued at $17.5 billion.

These valuations reflect substantive business performance. Fal's annual recurring revenue doubled to approximately $400 million. Fireworks surpassed $1 billion in ARR—a fivefold year-over-year increase—while processing trillions of tokens daily.

Fal, founded in 2021, hosts multimodal models capable of handling text, images, video, and audio. Fireworks AI, launched in 2022, built its platform around making open-source model inference fast and cost-effective for enterprise clients. Major clients including Adobe and Shopify rely on both platforms.

The investor rosters tell the same story. Sequoia, a16z, Lightspeed, Index Ventures, and Nvidia have all backed these companies. Nvidia's involvement is particularly telling: as a chipmaker, it has a strategic interest in ensuring robust inference infrastructure drives demand for its GPUs.

The valuations follow the fundamentals. Fireworks' $1 billion ARR with 5x year-over-year growth supports its $17.5 billion valuation, implying a 17.5x revenue multiple. Fal's $400 million ARR and $8 billion valuation target imply a roughly 20x multiple.