AI code-execution sandbox
E2B
E2B is a Firecracker-microVM sandbox that gives AI agents a secure, ~150ms-cold-start environment to run generated code, with pause/resume and filesystem snapshots.
Last verified 2026-07-26
E2B is the SDK-first, security-led leader in the AI sandbox category. Each session is an isolated Firecracker microVM with per-second billing, memory-state pause/resume and snapshots. Its TypeScript and Python SDKs are the cleanest in the category, and it is an official OpenAI Agents SDK provider.
Key specs
| Isolation | Firecracker microVM |
| Cold start | 150ms |
| Price / vCPU-hr | $0.05 |
| Pricing model | Per-second usage + plan |
| GPU | No |
| Session limit | Up to 24h |
| Persistence | Pause/resume with memory state, snapshots |
| Languages | Python, JavaScript/TypeScript, any (custom templates) |
| MCP support | — |
| Integrations | OpenAI Agents SDK, LangChain, Vercel AI SDK |
| Deployment | Managed cloud (self-host available) |
| Free tier | $100 one-time credit (Hobby) |
| Pro plan | $150/mo |
| Billing | Per second |
Strengths
- Best-in-class TS/Python SDK
- Strong Firecracker isolation
- Pause/resume + snapshots
- Official OpenAI Agents SDK provider
Trade-offs
- No in-sandbox GPU
- Pro plan starts at $150/mo
Best for: Teams that want the cleanest SDK and strong microVM isolation for agent code execution.
Head-to-head
Alternatives to E2B
Daytona — AI code-execution sandboxModal — AI code-execution sandboxVercel Sandbox — AI code-execution sandboxCloudflare Sandbox SDK — AI code-execution sandbox
Sources: E2B pricing ↗ · E2B docs ↗
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