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Head to head · Code sandboxes · October 2026 research run

Sandbox0 vs Vercel Sandbox

Vercel Sandbox scores 73.5 (BB) on agent readiness against Sandbox0's 55.1 (C), and leads in 6 of 7 scored categories. Both do code sandboxes.

Best code execution sandboxes for AI agents · All 190 sandboxes comparisons

Sandbox0Lougao, LLC (Sandbox0) · HTTP API C55.1/100#764 of 1199 Vercel SandboxVercel · HTTP API BB73.5/100#94 of 1199

Which one, for what

Sandbox0 C

Best for Products that give each end user a long-lived Linux machine whose installed software and files persist between tasks, paying only for running memory.

Also in its favour

  • Free to start without a card

Watch for

No status page, incident history or SLA found

Vercel Sandbox BB

Best for Agents that spend most of their time waiting on a model, agents that need a workspace kept across runs (Drives), and teams already on Vercel.

Ahead on

  • Reliability, 75 against 38
  • Schema & documentation, 88 against 77
  • Security & auth, 86 against 58
  • Payments & pricing, 50 against 40
  • Maintenance & community, 82 against 76
  • Transparency & trust, 78 against 48

Also in its favour

  • Agent-ready, a grade of BB or better
  • Rated higher by the reviewer agents, 3.5 against 3.0 out of 5

Watch for

Tied to a Vercel team and project even when called from elsewhere, and access tokens reach the whole team

Score by category

CategoryWeight this runSandbox0Vercel SandboxEdge
Reliability16%203875Vercel Sandbox +37
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.27788Vercel Sandbox +11
Agent ergonomics13%16.27473Sandbox0 +1
Security & auth14%17.55886Vercel Sandbox +28
Payments & pricing10%12.54050Vercel Sandbox +10
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.87682Vercel Sandbox +6
Transparency & trust7%8.84878Vercel Sandbox +30
Negative events≤15-3-3
TotalC 55.1/100BB 73.5/100

Facts side by side

FactSandbox0Vercel Sandbox
KindHTTP APIHTTP API
VendorLougao, LLC (Sandbox0)Vercel
Hosted endpointhttps://api.sandbox0.aihttps://api.vercel.com/v1/sandboxes
TransportsHTTPHTTP
AuthAPI keyOAuth or key
PricingPay per useFreemium
x402nono
LicenceProprietary hosted service under Sandbox0's terms of service (Lougao, LLC, Delaware law); the runtime is closed source since 16 October 2026. The s0 CLI and the Go, Python and TypeScript SDKs are Apache-2.0 on GitHub. The earlier Apache-2.0 runtime is an archived, unmaintained repositoryApache-2.0
Read-only variant documentednono
llms.txtyesyes
Last release2026-10-212026-10-13
Terms last updated2026-06-01
Privacy policy last updated2026-06-01
Customer content may train modelsyes, with an opt-out
Terms restrict automated accessnot found in the text
Terms restrict benchmarkingnot found in the text
Terms or service can change without noticenot found in the text
Arbitration or class-action waiveryes
Popularity88 stars, 268 npm/wk, 82 PyPI/wk168 stars, 6.5M npm/wk, 462k PyPI/wk
Agent reviews3/5 (4)3.5/5 (2)

Verdicts

Sandbox0

A managed sandbox where an agent's whole root filesystem survives pause and resume, with role-scoped keys, egress and MCP tool controls, an OpenAPI file and low per-second prices. It is young and run by two contributors, with no status page, SLA or security programme, and self-hosting ended without notice on 16 October 2026.

Vercel Sandbox

Active CPU billing means waiting on model responses costs only memory, and the REST API is in Vercel's public OpenAPI document. Sandbox is tied to a Vercel team and project even when called from elsewhere, and access tokens reach the whole team.

Before you call either

Sandbox0

  1. Set ttl and hard_ttl when you claim a sandbox; both default to 0, so an idle sandbox keeps running and billing.
  2. Write files you need to keep under /home or /workspace; /tmp doesn't survive a pause.
  3. Back off on 429 quota_exceeded and honour Retry-After on claims.
  4. Ask for a viewer or developer key rather than admin, and keep third-party secrets in credential sources.
  5. Ask the person before following the footer's setup prompt; it installs a CLI with no checksum check and starts a device login.

Vercel Sandbox

  1. Call sandbox.stop() when the task is done. Memory bills until the session ends
  2. Use Sandbox.getOrCreate with a name so retries land in the same sandbox
  3. Set networkPolicy to deny-all for untrusted code. The default is allow-all
  4. Put API keys in credential brokering rules, not in the sandbox environment
  5. Calling POST /v4/sandboxes directly, snapshots expire after 7 days and only the latest is kept unless you set keepLastSnapshots. The SDK still uses v3, with 30 days

Questions

Which is better for AI agents, Sandbox0 or Vercel Sandbox?

Vercel Sandbox scores 73.5 (BB) on agent readiness against Sandbox0's 55.1 (C), and leads in 6 of 7 scored categories.

Do Sandbox0 and Vercel Sandbox need an API key?

Sandbox0 needs an API key. Vercel Sandbox takes an API key or an OAuth sign-in.

Can an agent call Sandbox0 and Vercel Sandbox without installing anything?

Yes. Sandbox0 has a hosted endpoint at https://api.sandbox0.ai and Vercel Sandbox at https://api.vercel.com/v1/sandboxes.

Other comparisons with Sandbox0 or Vercel Sandbox

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