Sail is the most cost-efficient API for the best open-source models. Pay per token with unbeatable prices, cut costs even further with completion windows, and start with $5 in monthly free credits.
Location: United States
Total raised: $160M
Funding Rounds 2
| Date | Series | Amount | Investors |
| 25.06.2026 | Seed | $80M | - |
| 25.06.2026 | Series A | $80M | Sequoia Ca... |
Mentions in press and media 4
| Date | Title | Description |
| 25.06.2026 | Sail Research Raises $80M in Seed and Series A Funding | Sail Research, a San Francisco, CA-based infrastructure company purpose-built for long-horizon AI agents, raised $80M in Seed and Series A funding, at $450M valuation. The Series A was led by Kleiner Perkins, and the Seed was led by Sequoia... |
| 25.06.2026 | Sail Research Pulls In $80M Seed and Series A | SAN FRANCISCO, CA, 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. >> Click here for more funding... |
| 25.06.2026 | Sail Research raises $80M to optimize long-horizon AI agents | Artificial intelligence inference startup Sail Research Inc. today announced that it has raised $80 million in funding at a $450 million valuation. The company received the bulk of the capital in the form of a Series A round led by Sequoia.... |
| - | Sail Research | “Sail is an AI inference platform optimized for throughput for long-running background and agentic AI workloads, running leading open-source models on demand with $5/mo free credits.” |