E2B

E2B is an open-source secure sandbox environment providing AI agents with Linux virtual machines and tools.

E2B provides secure computers with real-world tools for AI agents. It functions through fast, secure Linux virtual machines created on demand, known as sandboxes. Users define the starting environment using templates. The platform includes persistence, allowing users to pause and resume sandboxes while saving both the filesystem and memory. Paused sandboxes are kept indefinitely until terminated. It is designed for developers building frontier agentic workflows.

E2B at a glance

Best for: Software engineer
Runs on: API, open source
Pricing: Freemium
Released: March 2023
Category: AI coding tool
Website: docs.e2b.dev

Key features

Secure Linux virtual machines
On-demand sandbox creation
Sandbox pausing and resumption
Filesystem and memory persistence
Environment definition via templates
Infinite retention for paused sandboxes

Use it for

Running frontier agentic workflows
Executing computer use tasks
Running GitHub Actions CI/CD

Alternatives to E2B

OpenSandbox — Provides isolated environments with multi-language SDKs and lifecycle management.
Agent Sandbox — Provides a secure and isolated execution layer for autonomous AI agents.
Daytona — It provisions sandboxes in under 90 milliseconds with full security isolation.
E2e — Uses AI agents to drive app actions and replays recorded steps without model calls.
AI Sandboxes by Buddy — Stateful virtual machines with persistent disks and public HTTPS endpoints.
AIO Sandbox — Provides an integrated environment for agents in a single Docker container.
Sandcastle — Orchestrates AI coding agents in isolated Docker, Podman, or Vercel sandboxes.
Freebuff — Access multiple coding AI models for free without subscriptions.
OpenCode — Works with 75+ model providers, local models, and existing subscriptions
CubeSandbox — Provides sub-60ms cold starts and hardware-level microVM kernel isolation.
microsandbox — Provides hardware-level isolation without needing daemons or complex setup.
jevgrep — Reduces coding agent costs by providing targeted, relevant repository context.

All E2B alternatives