# E2B

> 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.

Open-source Firecracker microVM sandboxes for AI agent code execution.

- **Category:** Execution Sandbox
- **License:** Apache-2.0
- **Language:** Python
- **Self-hosted:** Yes
- **GitHub stars:** 14150 (2026-10-04)
- **Repository:** https://github.com/e2b-dev/E2B
- **Last verified:** 2026-10-04

> 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.

Source: https://agent.c8.fit/tools/e2b/