Sail Research, the infrastructure company purpose-built for long-horizon AI agents, today announced it has raised $80 million in Seed and Series A funding at a $450 million valuation.
The Series A was led by Kleiner Perkins, and the Seed was led by Sequoia. Other participating investors included Redpoint Ventures, Theory Ventures, Vine Ventures, CRV, A*, and Abstract Ventures, in addition to angel investors, including John Hennessy, chairman of Alphabet Inc., Lip-Bu Tan, CEO of Intel, and Tri Dao, Chief Scientist at Together AI.
“Sail exists to make intelligence abundant,” said Neil Movva, co-founder and CEO of Sail. “Every decision we make, from the chip level to the API, is about giving teams the tokens, the scale, and the runtime to build agents without limits.”
Neil Movva spent years at NVIDIA pushing GPU performance to its limits, then built infrastructure expertise at Apple and Together AI. Co-founder and CTO Samir Menon also comes from Apple, where he built systems at a massive scale.
Sail’s infrastructure is already powering AI-driven workflows at companies like Parallel Web Systems, Jack and Jill, and Detail.dev.
Sail Research is the infrastructure company purpose-built for long-horizon AI agents. Sail’s platform combines two core components: an inference stack rebuilt from the ground up for throughput and efficiency, delivering up to 10x lower cost per token; and Sailboxes, a stateful sandbox environment designed to run for days rather than seconds. Together, they give teams the economics and scale to build agents that are maximally ambitious.