Best Code Sandboxes for Agents for AI Agents in 2026
Short answer: The best code sandboxes for agents for ai agents in 2026 is E2B. Purpose-built for AI agents, and the SDK everyone integrates first. Runner-up: Daytona. Best free option: Modal.
Safe places for agents to run untrusted code.
#1 Pick
E2B
Runner-up
Daytona
Best free
Modal
All code sandboxes for agents compared
| Tool | Price / free tier | MCP | Open source / local | Verdict |
|---|---|---|---|---|
| E2B | Hobby free ($100 one-time credit); Pro $150/mo + usage ($0.0504/vCPU-hr) | Unverified | Open source SDK (license not re-checked) | Purpose-built for AI agents, and the SDK everyone integrates first. |
| Daytona | Pay-as-you-go, no plan fee; $200 signup credit; same CPU rate as E2B | Unverified | Unverified | Same compute price as E2B with no monthly fee. |
| Modal | Starter free with $30/mo compute credit; Team $250/mo | Unverified | Proprietary | A recurring free credit makes it the best free option, plus GPUs when you need them. |
| Vercel Sandbox ⚠ Pricing not verified | Unverified | Unverified | Proprietary | Now has persistent Drives (GA Oct 15, 2026). Natural if you already deploy on Vercel. |
"Unverified" means we couldn't confirm it on 2026-10-15. Picks are editorial and never sold.
FAQ
What is the best code sandboxes for agent in 2026?
E2B. Purpose-built for AI agents, and the SDK everyone integrates first.
What is the best free option?
Modal: Starter free with $30/mo compute credit; Team $250/mo
What is the runner-up?
Daytona. Same compute price as E2B with no monthly fee.
How were these picks verified?
Prices and facts were checked against vendor pages or linked sources on 2026-10-15. Rankings are never sold.