Tool

E2B

Open-source Firecracker microVM sandboxes purpose-built for running AI-generated code in isolated environments with 150ms cold starts.

Our Take

E2B is the most widely integrated sandbox runtime across major agent frameworks, with over 11,000 GitHub stars and native support in LangChain, CrewAI, and the Vercel AI SDK. Its January 2026 partnership with Docker via MCP brought standardized sandbox access to any MCP-compatible agent, reinforcing E2B as a default choice for the Ephemeral Workbench pattern. The Apache 2.0 licensed core means teams can self-host, while the managed cloud handles scaling for production workloads.

Pricing

Free

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