Why Fireworks AI

Why Fireworks AIFireworks AI is one of the fastest-growing companies in the AI infrastructure space. We built and operate the leading platform for both inference and training, the only place where teams can fine-tune frontier models and deploy them at production scale on a single platform. We are a Series C company valued at $4B, backed by Benchmark, Sequoia, Lightspeed, Index, and Evantic, and founded by veterans of Meta PyTorch and Google Vertex AI.

In the last few months alone we launched Fireworks Training, partnered with Microsoft Azure Foundry, and published research straight from our production systems. A few examples of what that looks like in practice:

• Frontier RL is cheaper than the mega-cluster narrative suggests: we ran cross-region rollouts using 98% sparse weight deltas and published what we learned. (blog)

• Open source agents with frontier advisors: matching frontier performance through training ...