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E2B
secure cloud sandboxes for AI-generated code
- Domains
- Code · Computer Use
- Founded
- Est. 2023
- HQ
- San Francisco, USA
- Funding
- Seed
- Open source
- Open-source
§ Positioning
Execution infrastructure for code-running agents; not an environment itself but the substrate many environments run on.
Best for · Teams running code-execution agents or building RL loops on top of fast, isolated sandboxes.
Team · Founded by Vasek Mlejnsky and Tomas Valenta.
Focus · Open-source secure cloud sandboxes for running AI-generated code, with sub-second startup.
Notable customers · Developers and agent platforms
§ Infrastructure
Unscored - adjacent infrastructure
E2B provides execution infrastructure that RL environments run on, rather than building environments itself. Listed here for context but not scored against the environment-native rubric.