AI infrastructure firm Sail Research has raised $80 million in a combined seed and Series A funding round, achieving a post-money valuation of $450 million. The funding was led by prominent investors such as Kleiner Perkins, Sequoia, and Redpoint Ventures, with participation from angel investors including Alphabet Chairman John Hennessy. Sail Research specializes in providing cost-effective, high-throughput inference infrastructure for AI agents, offering a sandbox environment known as Sailboxes. The company claims its technology achieves 90.72% accuracy on the BrowseComp-Plus benchmark at significantly reduced costs. Its API is compatible with OpenAI workflows and supports various open-source models, serving clients like Parallel Web Systems and Detail.dev.