Sail Research
Infrastructure for long-horizon AI agents, persistent sandboxes, and efficient inference.
The Company
Sail Research provides infrastructure for long-horizon AI agents, including persistent environments and telemetry intended to let agents work over hours or days. The company argues that this workload needs different infrastructure than short, turn-by-turn model interactions.
In June 2026, Sail announced $80 million of seed and Series A funding at a $450 million valuation. Sequoia led the seed and Kleiner Perkins led the Series A.
Why It Matters
The infrastructure required for agents that operate for hours or days differs from simple chat inference. Sail is an early private benchmark for whether persistent agent workloads develop into a distinct cloud category.
Valuation History
- $450M→Jun 2026$80M seed and Series ASource ↗
What Changed
Profile reviewed against available public information.
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