E2B
Execution SandboxOpen source · Apache-2.0★ 14,150（2026-10-04）Self-hosted
Open-source Firecracker microVM sandboxes for AI agent code execution.
E2B runs each agent session in its own Firecracker microVM with a dedicated guest kernel, reporting roughly 150-200ms warm and 300-500ms cold start; its core runtime is Apache-2.0 and can be self-hosted via E2B Embed or Terraform on AWS/GCP, alongside the vendor's managed cloud.
Caveat: The runtime is Apache-2.0 while the Python SDK package is published under MIT; most teams use the managed cloud rather than self-hosting.
Key facts
| Category | Execution Sandbox |
|---|---|
| License | Apache-2.0 |
| Language | Python |
| Self-hosted | Yes |
| GitHub stars | 14,150 (2026-10-04) |
| Last push | 2026-10-02 |
| Last verified | 2026-10-04 |
| Repository | https://github.com/e2b-dev/E2B |
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