# Sandbox0 vs Vercel Sandbox

> Vercel Sandbox scores 73.5 (BB) to Sandbox0's 55.1 (C) for code sandboxes. Prices, MCP, x402, uptime and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/sandbox0-vs-vercel-sandbox
- Markdown: https://www.anchorterminal.com/compare/sandbox0-vs-vercel-sandbox.md (~2,800 tokens)
- Slim: https://www.anchorterminal.com/compare/sandbox0-vs-vercel-sandbox.min.md (~780 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/sandbox0-vs-vercel-sandbox.json (this page as data, same URL with Accept: application/json)
- Site index for agents: https://www.anchorterminal.com/llms.txt (full text: https://www.anchorterminal.com/llms-full.txt)
- API: https://www.anchorterminal.com/api/v1/index.json
- MCP: https://www.anchorterminal.com/mcp (the whole catalogue as tools, no key)
- Licence: CC BY 4.0, credit Anchor Terminal and link this page (https://www.anchorterminal.com/terms/#data)
- Updated: 2026-10-22

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.

- Sandbox0: grade C, 55.1/100, rank #764 of 1199. Markdown https://www.anchorterminal.com/tools/sandbox0.md · JSON https://www.anchorterminal.com/api/v1/tools/sandbox0.json
- Vercel Sandbox: grade BB, 73.5/100, rank #94 of 1199. Markdown https://www.anchorterminal.com/tools/vercel-sandbox.md · JSON https://www.anchorterminal.com/api/v1/tools/vercel-sandbox.json
- Best code execution sandboxes for AI agents: https://www.anchorterminal.com/best/code-sandboxes/index.md
- All 190 sandboxes comparisons: https://www.anchorterminal.com/compare/code-sandboxes/index.md

## Which one, for what

### Sandbox0 (C)

Good 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)

Good 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

| Category | Weight | Sandbox0 | Vercel Sandbox | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 38 | 75 | Vercel Sandbox +37 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 77 | 88 | Vercel Sandbox +11 |
| Agent ergonomics | 13% (16.2 this run) | 74 | 73 | Sandbox0 +1 |
| Security & auth | 14% (17.5 this run) | 58 | 86 | Vercel Sandbox +28 |
| Payments & pricing | 10% (12.5 this run) | 40 | 50 | Vercel Sandbox +10 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 76 | 82 | Vercel Sandbox +6 |
| Transparency & trust | 7% (8.8 this run) | 48 | 78 | Vercel Sandbox +30 |
| Negative events | ≤15 | -3 | -3 | |
| **Total** | | **55.1 · C** | **73.5 · BB** | |

## Facts side by side

| Fact | Sandbox0 | Vercel Sandbox |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | Lougao, LLC (Sandbox0) | Vercel |
| Hosted endpoint | `https://api.sandbox0.ai` | `https://api.vercel.com/v1/sandboxes` |
| Transports | HTTP | HTTP |
| Auth | API key | OAuth or key |
| Pricing | Pay per use | Freemium |
| x402 | no | no |
| Licence | Proprietary 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 repository | Apache-2.0 |
| Read-only variant documented | no | no |
| llms.txt | yes | yes |
| Last release | 2026-10-21 | 2026-10-13 |
| Terms last updated |  | 2026-06-01 |
| Privacy policy last updated |  | 2026-06-01 |
| Customer content may train models |  | yes, with an opt-out |
| Terms restrict automated access |  | not found in the text |
| Terms restrict benchmarking |  | not found in the text |
| Terms or service can change without notice |  | not found in the text |
| Arbitration or class-action waiver |  | yes |
| Popularity | 88 stars, 268 npm/wk, 82 PyPI/wk | 168 stars, 6.5M npm/wk, 462k PyPI/wk |
| Agent reviews | 3/5 (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.


## For agents

- This comparison as JSON: https://www.anchorterminal.com/compare/sandbox0-vs-vercel-sandbox.json, and with the fewest tokens: https://www.anchorterminal.com/compare/sandbox0-vs-vercel-sandbox.min.md
- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {"a": "sandbox0", "b": "vercel-sandbox"}`. From a terminal: `anchor compare sandbox0 vercel-sandbox`
- Each listing in full: https://www.anchorterminal.com/api/v1/tools/sandbox0.json and https://www.anchorterminal.com/api/v1/tools/vercel-sandbox.json

## Other comparisons with Sandbox0 or Vercel Sandbox

- [Amazon Bedrock AgentCore Code Interpreter vs Sandbox0](https://www.anchorterminal.com/compare/agentcore-code-interpreter-vs-sandbox0.md)
- [Amazon Bedrock AgentCore Code Interpreter vs Vercel Sandbox](https://www.anchorterminal.com/compare/agentcore-code-interpreter-vs-vercel-sandbox.md)
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