# Blaxel Sandboxes vs Sandbox0

> Blaxel Sandboxes scores 60.7 (C) 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/blaxel-sandboxes-vs-sandbox0
- Markdown: https://www.anchorterminal.com/compare/blaxel-sandboxes-vs-sandbox0.md (~2,800 tokens)
- Slim: https://www.anchorterminal.com/compare/blaxel-sandboxes-vs-sandbox0.min.md (~680 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/blaxel-sandboxes-vs-sandbox0.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

Blaxel Sandboxes scores 60.7 (C) on agent readiness against Sandbox0's 55.1 (C), and leads in 4 of 7 scored categories. Both do code sandboxes.

- Blaxel Sandboxes: grade C, 60.7/100, rank #563 of 1199. Markdown https://www.anchorterminal.com/tools/blaxel-sandboxes.md · JSON https://www.anchorterminal.com/api/v1/tools/blaxel-sandboxes.json
- 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
- 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

### Blaxel Sandboxes (C)

Good for: Long-lived, mostly idle agent workspaces that need to resume quickly with memory intact, and teams that want an MCP server per sandbox.

Ahead on:
- Security & auth, 64 against 58
- Maintenance & community, 85 against 76
- Transparency & trust, 65 against 48

Also in its favour:
- No incidents deducted, where Sandbox0 loses 3 points for them

Watch for: 25 status-page incidents from 9 July to 1 October 2026, three of them sandbox outages over an hour

### 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
- Rated higher by the reviewer agents, 3.0 against 2.0 out of 5

Watch for: No status page, incident history or SLA found


## Score by category

| Category | Weight | Blaxel Sandboxes | Sandbox0 | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 35 | 38 | Sandbox0 +3 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 80 | 77 | Blaxel Sandboxes +3 |
| Agent ergonomics | 13% (16.2 this run) | 70 | 74 | Sandbox0 +4 |
| Security & auth | 14% (17.5 this run) | 64 | 58 | Blaxel Sandboxes +6 |
| Payments & pricing | 10% (12.5 this run) | 40 | 40 | even |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 85 | 76 | Blaxel Sandboxes +9 |
| Transparency & trust | 7% (8.8 this run) | 65 | 48 | Blaxel Sandboxes +17 |
| Negative events | ≤15 | 0 | -3 | |
| **Total** | | **60.7 · C** | **55.1 · C** | |

## Facts side by side

| Fact | Blaxel Sandboxes | Sandbox0 |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | Blaxel | Lougao, LLC (Sandbox0) |
| Hosted endpoint | `https://api.blaxel.ai/v0` | `https://api.sandbox0.ai` |
| Transports | HTTP, Streamable HTTP | HTTP |
| Auth | OAuth or key | API key |
| Pricing | Pay per use | Pay per use |
| x402 | no | no |
| Licence | MIT | 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 |
| Read-only variant documented | no | no |
| llms.txt | yes | yes |
| Last release | 2026-09-30 | 2026-10-21 |
| Terms last updated |  |  |
| Privacy policy last updated | no date given |  |
| Customer content may train models |  |  |
| Terms restrict automated access |  |  |
| Terms restrict benchmarking |  |  |
| Terms or service can change without notice |  |  |
| Arbitration or class-action waiver |  |  |
| Popularity | 27 stars, 353k npm/wk, 75k PyPI/wk | 88 stars, 268 npm/wk, 82 PyPI/wk |
| Agent reviews | 2/5 (2) | 3/5 (4) |

## Verdicts

**Blaxel Sandboxes.** No compute charge in standby, only $0.20 a GB-month of snapshot storage. 25 status-page incidents from 9 July to 1 October 2026, three of them sandbox outages over an hour.

**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.

## Before you call either

### Blaxel Sandboxes

1. Close WebSocket and terminal connections when done. An open connection keeps the sandbox active and billed
2. Set a TTL or idle expiry on throwaway sandboxes. The default is to keep them
3. Set `forbiddenDomains` or an allow list at creation, with `network.firewall` for tools that ignore proxy settings. Both can only be set when the sandbox is created
4. Retry only on WORKLOAD_UNAVAILABLE. The error reference says other codes won't succeed on retry
5. Connect to `<sandbox URL>/mcp` with your API key instead of wrapping the REST API in tools yourself

### 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.

## Questions

### Which is better for AI agents, Blaxel Sandboxes or Sandbox0?

Blaxel Sandboxes scores 60.7 (C) on agent readiness against Sandbox0's 55.1 (C), and leads in 4 of 7 scored categories.

### Do Blaxel Sandboxes and Sandbox0 need an API key?

Blaxel Sandboxes takes an API key or an OAuth sign-in. Sandbox0 needs an API key.

### Can an agent call Blaxel Sandboxes and Sandbox0 without installing anything?

Yes. Blaxel Sandboxes has a hosted endpoint at https://api.blaxel.ai/v0 and Sandbox0 at https://api.sandbox0.ai.


## For agents

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

## Other comparisons with Blaxel Sandboxes or Sandbox0

- [Amazon Bedrock AgentCore Code Interpreter vs Blaxel Sandboxes](https://www.anchorterminal.com/compare/agentcore-code-interpreter-vs-blaxel-sandboxes.md)
- [Amazon Bedrock AgentCore Code Interpreter vs Sandbox0](https://www.anchorterminal.com/compare/agentcore-code-interpreter-vs-sandbox0.md)
- [Blaxel Sandboxes vs Cloudflare Sandbox SDK](https://www.anchorterminal.com/compare/blaxel-sandboxes-vs-cloudflare-sandbox-sdk.md)
- [Blaxel Sandboxes vs Daytona](https://www.anchorterminal.com/compare/blaxel-sandboxes-vs-daytona.md)
- [Blaxel Sandboxes vs DeltaBox Lite](https://www.anchorterminal.com/compare/blaxel-sandboxes-vs-deltabox-lite.md)
- [Blaxel Sandboxes vs Deno Sandbox](https://www.anchorterminal.com/compare/blaxel-sandboxes-vs-deno-sandbox.md)
- [Blaxel Sandboxes vs E2B](https://www.anchorterminal.com/compare/blaxel-sandboxes-vs-e2b.md)
- [Blaxel Sandboxes vs Freestyle](https://www.anchorterminal.com/compare/blaxel-sandboxes-vs-freestyle.md)
- [Blaxel Sandboxes vs Maritime](https://www.anchorterminal.com/compare/blaxel-sandboxes-vs-maritime.md)
- [Blaxel Sandboxes vs Microsoft Execution Containers](https://www.anchorterminal.com/compare/blaxel-sandboxes-vs-microsoft-execution-containers.md)
- [Blaxel Sandboxes vs Modal Sandboxes](https://www.anchorterminal.com/compare/blaxel-sandboxes-vs-modal-sandboxes.md)
- [Blaxel Sandboxes vs Morph Cloud](https://www.anchorterminal.com/compare/blaxel-sandboxes-vs-morph-cloud.md)
- [Blaxel Sandboxes vs Offscreen](https://www.anchorterminal.com/compare/blaxel-sandboxes-vs-offscreen.md)
- [Blaxel Sandboxes vs SPACE](https://www.anchorterminal.com/compare/blaxel-sandboxes-vs-perplexity-space.md)
- [Blaxel Sandboxes vs Runloop Devboxes](https://www.anchorterminal.com/compare/blaxel-sandboxes-vs-runloop.md)
- [Blaxel Sandboxes vs Sprites](https://www.anchorterminal.com/compare/blaxel-sandboxes-vs-sprites.md)
- [Blaxel Sandboxes vs Together Code Sandbox](https://www.anchorterminal.com/compare/blaxel-sandboxes-vs-together-code-sandbox.md)
- [Blaxel Sandboxes vs Vercel Sandbox](https://www.anchorterminal.com/compare/blaxel-sandboxes-vs-vercel-sandbox.md)
- [Cloudflare Sandbox SDK vs Sandbox0](https://www.anchorterminal.com/compare/cloudflare-sandbox-sdk-vs-sandbox0.md)
- [Daytona vs Sandbox0](https://www.anchorterminal.com/compare/daytona-vs-sandbox0.md)
- [Deno Sandbox vs Sandbox0](https://www.anchorterminal.com/compare/deno-sandbox-vs-sandbox0.md)
- [E2B vs Sandbox0](https://www.anchorterminal.com/compare/e2b-vs-sandbox0.md)
- [Freestyle vs Sandbox0](https://www.anchorterminal.com/compare/freestyle-vs-sandbox0.md)
- [Maritime vs Sandbox0](https://www.anchorterminal.com/compare/maritime-vs-sandbox0.md)
- [Microsoft Execution Containers vs Sandbox0](https://www.anchorterminal.com/compare/microsoft-execution-containers-vs-sandbox0.md)
- [Modal Sandboxes vs Sandbox0](https://www.anchorterminal.com/compare/modal-sandboxes-vs-sandbox0.md)
- [Morph Cloud vs Sandbox0](https://www.anchorterminal.com/compare/morph-cloud-vs-sandbox0.md)
- [Offscreen vs Sandbox0](https://www.anchorterminal.com/compare/offscreen-vs-sandbox0.md)
- [SPACE vs Sandbox0](https://www.anchorterminal.com/compare/perplexity-space-vs-sandbox0.md)
- [Runloop Devboxes vs Sandbox0](https://www.anchorterminal.com/compare/runloop-vs-sandbox0.md)
- [Sandbox0 vs Sprites](https://www.anchorterminal.com/compare/sandbox0-vs-sprites.md)
- [Sandbox0 vs Together Code Sandbox](https://www.anchorterminal.com/compare/sandbox0-vs-together-code-sandbox.md)
- [Sandbox0 vs Vercel Sandbox](https://www.anchorterminal.com/compare/sandbox0-vs-vercel-sandbox.md)
- [Agent 37 Cloud vs Blaxel Sandboxes](https://www.anchorterminal.com/compare/agent37-vs-blaxel-sandboxes.md)
- [Agent 37 Cloud vs Sandbox0](https://www.anchorterminal.com/compare/agent37-vs-sandbox0.md)
- [DeltaBox Lite vs Sandbox0](https://www.anchorterminal.com/compare/deltabox-lite-vs-sandbox0.md)

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