Sail Research Raises $80M Series A at $450M Valuation

Sail Research, a San Francisco based infrastructure company focused on AI agents, has raised $80 million in combined Seed and Series A funding, bringing its valuation to $450 million. The company provides a platform specifically designed to support long-horizon AI agents through optimized inference stacks and stateful sandbox environments.

Investors

The Series A round was led by Kleiner Perkins, and the Seed round was led by Sequoia. Additional participating investors included Redpoint Ventures, Theory Ventures, Vine Ventures, CRV, A*, and Abstract Ventures, along with individual angel investors John Hennessy, Lip-Bu Tan, and Tri Dao.

Sail Research Use of Funds

Sail Research intends to use the capital to scale its infrastructure platform, further optimize its inference stack, and expand its team to continue building out tools that allow companies to run complex, long-horizon AI agent workloads more efficiently and at a lower cost.

About Sail Research

Founded in 2026, Sail Research was established by Neil Movva and Samir Menon. The company focuses on the AI agent infrastructure layer, providing tools that allow autonomous agents to perform complex, long-running tasks. Their product features a high-throughput inference stack and a sandbox environment called Sailboxes that enables agents to run for extended durations.

Funding Details

Company Website: https://sailresearch.com

Company: Sail Research
Raised: $80M
Round: Series A
Funding Date: June 25, 2026
Lead Investor: Kleiner Perkins, Sequoia
Additional Investors: Redpoint Ventures, Theory Ventures, Vine Ventures, CRV, A*, Abstract Ventures, John Hennessy, Lip-Bu Tan, Tri Dao
Company Website: https://sailresearch.com
Software Category: AI Infrastructure
Source: https://thenextweb.com/news/sail-research-80m-ai-agent-inference