Sail is the infrastructure platform for long-horizon agents. We combine max-efficiency serving of AI models with hosted sandboxes for AI agents. Our pricing is usage-based and extremely competitive, because we optimize all our hardware and software for efficient throughput. We've served trillions of tokens to customers in applications like code review, deep research, and cybersecurity.
Our API is OpenAI-compatible, and we support all the best open models (Deepseek, Kimi, Qwen, etc), including fine-tunes. Sign up for an API key and let the tokens flow within minutes. Or email us to discuss exactly what you need.
About us
We are systems nerds with commercial focus. We work at every level of the stack by:
Writing CUDA to push towards speed-of-light performance on GPUs
Digging into the guts of inference engines like SGLang to maximize efficiency
Distributing work across providers to maximize robustness and fleet utilization
Using spot compute when it's available, and safely failing over to more reliable compute when it's not
If this all sounds exciting, and it's hard to pick just one, then we're just like you. Let's talk!
Why
Agents are getting really good at running autonomously. In 2026, they will be good enough to make meaningful, independent progress on hard problems, given sufficient tokens. Our job is to dramatically increase intelligence per dollar, and make sure no compute goes to waste.