E2B
New
Let your AI agent execute real code in a secure cloud sandbox — spins up in 150ms, runs Python and JavaScript safely, and tears down cleanly when done.
Developer Tools
★ 4.5(1,100 reviews)freemiumOverview
E2B provides sandboxed code execution environments for AI agents — secure, isolated cloud VMs that spin up in under 150ms and let agents run, test, and iterate on code without touching your infrastructure. Each sandbox is fully ephemeral and isolated so agents can execute untrusted code safely. Integrates with Claude, GPT-4o, and any agent framework that generates code as part of its reasoning loop.
Key Features
- Sandboxed cloud VMs with 150ms cold start times
- Python, JavaScript, Bash, and custom Docker environments
- File system access, network calls, and package installation inside sandbox
- SDK integrations for Claude, GPT-4o, Gemini, and LangChain
- Persistent sandbox state across multi-step agent runs
- Custom sandbox templates via Dockerfile
Pros
- • Solves unsafe code execution cleanly — no infrastructure risk
- • Fast enough (150ms) for interactive agentic reasoning loops
- • Free tier is generous for development and prototyping
Cons
- • Ephemeral by default — persistent state requires explicit config
- • Sandbox compute is metered — long-running agents can get expensive
- • Network access inside sandbox may need allowlisting for enterprise use
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