Sail Research Raises $80M for AI Agent Optimization

Sail Research has raised $80 million at a $450 million valuation, with a Sequoia-led Series A forming the bulk of funding. Notable investors include Intel CEO Lip-Bu Tan, Alphabet Chair John Hennessy, and Redpoint Ventures. The startup runs a cloud platform enabling long-horizon AI agents to complete tasks spanning weeks at a fraction of competitors' costs. Its platform uses customized open-source inference engines and Linux-based virtual machines called Sailboxes, achieving a record 90.72% score on the BrowseComp-Plus benchmark while cutting inference costs by 90%.