Together Code Sandbox vs E2B
Choose Together Code Sandbox for aI app builders and coding products that need hibernatable, forkable dev-environment VMs with preview URLs; choose E2B for code interpreters and short-to-medium-lived agent tasks that need microVM isolation, with an open-source self-host path. Together Code Sandbox uses MicroVM isolation; E2B uses Firecracker microVM isolation and is open source.
Together Code Sandbox vs E2B at a glance
| Attribute | Together Code Sandbox | E2B |
|---|---|---|
| What it is | Together AI’s microVM sandbox service, built on the CodeSandbox acquisition, with snapshot-based starts, hibernation, cloning and preview URLs. | Open-source cloud sandboxes for AI agents, each a Firecracker microVM, with pause/resume, snapshots and forking. |
| Isolation | MicroVMs (Together and CodeSandbox documentation) | Firecracker microVM with its own kernel per sandbox |
| Open source | No (Client SDK MIT) | Yes (Apache-2.0) |
| Self-host / BYOC | No / Not documented | Yes / Yes |
| SDKs | Python, TypeScript | Python, JavaScript/TypeScript |
| Cold start (vendor claim) | Start from memory snapshot in 500 ms (P95); clone in under 1 s; 2.7 s (P95) cold start (vendor claims) | Not documented |
| Max session | Runs until terminated unless a TTL is set | Up to 1 hour continuous (Hobby), 24 hours (Pro) or custom (Enterprise); pausing resets the clock and paused sandboxes are kept until deleted |
| Persistence | Hibernation snapshots disk and memory and resumes exact state; hibernated sandboxes can be forked; snapshots from Dockerfiles | Pause/resume preserves filesystem and memory; snapshots of running sandboxes, forking from a snapshot, filesystem-only snapshots, auto-resume and volumes (beta) |
| GPU | Not documented | No — sandboxes are CPU-only |
| Networking | Preview URLs for exposed ports; egress controls not documented | Internet on by default; can be disabled or restricted with allow/deny lists of IPs, CIDRs and domains; public sandbox URLs for exposed ports; custom domains and published egress IPs |
| Pricing | $0.0446 per vCPU-hour + $0.0149 per GiB-hour; custom pricing for large deployments | Per second: $0.000014 per vCPU-second (~$0.050/vCPU-hour) + $0.0000045 per GiB-second (~$0.016/GiB-hour). Pro plan $150/month plus usage; Enterprise from $3,000/month |
| Compliance | Not documented | SOC 2 Type II; HIPAA BAA and DPA available on request |
| Best for | AI app builders and coding products that need hibernatable, forkable dev-environment VMs with preview URLs | Code interpreters and short-to-medium-lived agent tasks that need microVM isolation, with an open-source self-host path |
Verified November 8, 2026 from each provider’s documentation. Cold-start figures are vendor claims, not our measurements.
Which should you choose?
Choose Together Code Sandbox if…
- You build an AI coding product that needs dev-environment-style VMs
- You want hibernate-and-resume with memory preserved
- You already use Together AI for inference
Choose E2B if…
- You want the most widely integrated agent sandbox, with a large ecosystem of examples
- You need Firecracker microVM isolation for untrusted multi-tenant code
- You want an open-source codebase you can self-host or run via BYOC
- You want ready-made code-interpreter and desktop SDKs
Both are worth piloting with your own image and region. See the full Together Code Sandbox profile and E2B profile, or the complete comparison.
Frequently asked questions
Is Together Code Sandbox or E2B better for AI agents?
Which is open source, Together Code Sandbox or E2B?
How do Together Code Sandbox and E2B isolate code?
Sources
Cite this page
Agent Sandboxes. (2026). Together Code Sandbox vs E2B. agentsandboxes.org. Last reviewed November 8, 2026. https://agentsandboxes.org/compare/codesandbox-vs-e2b/
Found an error or a missing sandbox? Submit a correction — every entry links to the sources it relies on.