Sail Research Raises $80M to Build Agent Infrastructure

Sail Research raised $80 million in Seed and Series A funding led by Sequoia Capital and Kleiner Perkins, valuing the startup at $450 million. The company builds infrastructure for long-horizon AI agents, claiming up to 10x lower cost-per-token through custom chips and inference engines.

According to Sail Research's announcement, the San Francisco startup raised $80,000,000 in combined Seed and Series A funding. The company said its seed was led by Sequoia Capital and the Series A was led by Kleiner Perkins , with participation from Redpoint Ventures , Theory Ventures , Vine Ventures , CRV , A and Abstract Ventures . Fortune reported the deal values Sail at $450 million . Sail's blog and coverage in The Next Web describe the product as infrastructure optimised for long-horizon AI agents, claiming up to 10x lower cost-per-token through custom chips, inference engines, and a global controller. Angel investors named in the announcement include John Hennessy , Lip-Bu Tan , and Tri Dao , and Sail listed early customers deploying agent workloads.