E2B
Open-source cloud sandboxes for AI agents
E2B provides open-source sandboxed cloud environments that start in under 200ms for AI agents to execute code safely, powering hundreds of millions of sessions. Its sandboxes are widely used as the execution layer for agent evals and RL environments; customers include Perplexity and Hugging Face.
Used by 88% of the Fortune 100
| Website | e2b.dev |
|---|---|
| Domains | Agents Infrastructure, Coding |
| Location | San Francisco |
| Team size | 26-50 |
| Founded | 2023 |
| Funding | Series A, $21M (Insight Partners, July 2025); $32M total |
| Founders | Vasek Mlejnsky @mlejva, Tomas Valenta |
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