E2B review: Isolated microVM sandboxes where AI agents run code, browse and use tools
Isolated microVM sandboxes where AI agents run code, browse and use tools
Starts at $150/mo, free plan: yes, prices checked on October 30, 2026.
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What E2B does
Gives each AI agent session its own isolated microVM where it can run code, use a browser or desktop, and keep files, reached through an API and SDKs.
E2B provides the machine an AI agent works on. You build the agent, including the model, prompts and logic, and E2B runs an isolated microVM for each session. Inside it the agent can run commands and code, use a terminal or a full desktop, keep files, and hold secrets. Sandboxes can be paused, resumed, snapshotted and forked, and network access is controlled through ingress and egress policy.
The platform is reached through an API and SDKs. Separate packages cover the base sandbox, a Code Interpreter that runs Python or JavaScript, and a desktop option for computer-use agents. The vendor lists ready-made templates and framework integrations, such as Claude Code, Codex, LangChain and the OpenAI Agents SDK. Sandboxes can run in E2B's own cloud or inside your AWS, GCP or Azure account through BYOC. The vendor states the runtime is Apache-2.0 and that the service is SOC 2 Type II and HIPAA compliant.
Pricing is freemium. The Hobby plan is free and includes a $100 one-time usage credit, sessions up to 1 hour and 20 concurrent sandboxes, with no credit card required. Pro costs $150 per month plus usage, with sessions up to 24 hours and 100 concurrent sandboxes, expandable to 1,100. Enterprise pricing is custom and is described as requiring a $3,000/mo minimum. Usage is charged per second of a running sandbox, so cost depends on sandbox size and run time. The pricing page also lists paid concurrency add-ons above the Pro baseline.
- Isolated microVM per agent session
- Run commands, code, terminal and desktop
- Pause, resume, snapshot and fork
- Network ingress and egress policy
- Persistent filesystem and storage buckets
- Secrets vault
- Metrics, logs and signed webhooks
- Run in E2B cloud or your own cloud
Good for / Not for
Good for
- Teams building coding or data-analysis agents that must execute generated code safely
- Companies needing sandboxes inside their own AWS, GCP or Azure account
- Developers running many parallel sandboxes for agent evaluation or reinforcement learning
Not for
- People looking for a finished end-user app rather than developer infrastructure
- Free-tier users needing sessions longer than 1 hour
How to start
Install the SDK with pip install e2b or npm i e2b. source
Start on the free Hobby plan, which needs no credit card and includes a $100 one-time usage credit. source
Create a sandbox and let your agent run code, use the filesystem or network inside it. source
Upgrade to Pro at $150 per month for longer sessions and more concurrency. source
Limits and gotchas
- Hobby: sessions up to 1 hour and 20 concurrent sandboxes. source
- On the Pro plan, a single session can last as long as 24 hours, and you get 100 sandboxes running at once, with the limit able to grow to 1,100. source
- Plan prices exclude usage, which is charged per second of a running sandbox. source
- Enterprise requires a $3,000/mo minimum. source
From the official site and docs of E2B, checked on October 30, 2026.
Pros and cons
Pros
- Each agent session gets its own isolated microVM
- Free Hobby plan with a $100 one-time credit and no credit card required
- Can run in E2B's cloud or in your own AWS, GCP or Azure account
- Runtime is Apache-2.0 and the vendor states SOC 2 Type II and HIPAA compliance
- Pause, resume, snapshot and fork controls for sandboxes
Cons
- Usage is billed on top of plan fees, so total cost is harder to predict
- Hobby sessions are limited to 1 hour and 20 concurrent sandboxes
- Pro starts at $150 per month before any usage costs
- Enterprise requires a $3,000/mo minimum and has custom pricing
- Developer infrastructure only; no end-user app or platforms beyond the API are stated
Our take
E2B suits developers and teams building AI agents that need a safe, isolated place to execute code, browse or drive a desktop, especially when data must stay in their own cloud. The free Hobby plan lets you try it with credits before paying. It does not fit people who want a ready-made end-user app, since this is infrastructure you call through an API and SDKs. Costs have two parts, a plan fee and per-second usage, so budgeting takes the cost calculator. Hobby sessions are capped at 1 hour, which may matter for longer jobs.
Comparisons and lists with E2B
Coming soon
Coming soon — we are writing comparisons that include E2B.
E2B pricing
| Plan | Monthly billing | Annual billing (per month) | Limits / what’s included |
|---|---|---|---|
| Hobby free, plus usage costs | Free | — | $100 one-time usage credit; sessions up to 1 hour; 20 concurrent sandboxes; default sandbox CPU and RAM; no credit card required |
| Pro per month, plus usage costs | $150 | — | Usage billed by the second; sessions up to 24 hours; 100 concurrent sandboxes, expandable to 1,100; custom sandbox CPU and RAM; billed through Stripe |
| Enterprise custom | — | — | Committed usage, custom billing; multi-day and persistent sessions; tens of thousands of concurrent sandboxes; custom sizes plus BYOC deployment |
Free trial: none listed. Free plan: yes.
Prices checked on on the official E2B pricing page. “—” = not published.
All E2B plans, limits and annual prices →
Frequently asked questions
Does E2B have a free plan?
Yes. The Hobby plan is free, includes a $100 one-time usage credit, and does not require a credit card.
How much does the Pro plan cost?
Pro is $150 per month plus usage costs. It allows sessions up to 24 hours and 100 concurrent sandboxes, expandable to 1,100.
How is usage charged?
The pricing page says E2B charges per second of a running sandbox, with rates depending on vCPUs and memory.
Can E2B run in my own cloud?
Yes. The vendor lists BYOC deployment in AWS, GCP or Azure, and Enterprise includes custom sizes plus BYOC deployment.
Is E2B open source?
The vendor states the runtime is Apache-2.0 and can be self-hosted.
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