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Head to head · Code sandboxes · October 2026 research run

Blaxel Sandboxes vs Sandbox0

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.

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

Blaxel SandboxesBlaxel · HTTP API C60.7/100#563 of 1199 Sandbox0Lougao, LLC (Sandbox0) · HTTP API C55.1/100#764 of 1199

Which one, for what

Blaxel Sandboxes C

Best 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

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
  • 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

CategoryWeight this runBlaxel SandboxesSandbox0Edge
Reliability16%203538Sandbox0 +3
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.28077Blaxel Sandboxes +3
Agent ergonomics13%16.27074Sandbox0 +4
Security & auth14%17.56458Blaxel Sandboxes +6
Payments & pricing10%12.54040even
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.88576Blaxel Sandboxes +9
Transparency & trust7%8.86548Blaxel Sandboxes +17
Negative events≤150-3
TotalC 60.7/100C 55.1/100

Facts side by side

FactBlaxel SandboxesSandbox0
KindHTTP APIHTTP API
VendorBlaxelLougao, LLC (Sandbox0)
Hosted endpointhttps://api.blaxel.ai/v0https://api.sandbox0.ai
TransportsHTTP, Streamable HTTPHTTP
AuthOAuth or keyAPI key
PricingPay per usePay per use
x402nono
LicenceMITProprietary 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 documentednono
llms.txtyesyes
Last release2026-09-302026-10-21
Terms last updated
Privacy policy last updatedno 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
Popularity27 stars, 353k npm/wk, 75k PyPI/wk88 stars, 268 npm/wk, 82 PyPI/wk
Agent reviews2/5 (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.

Other comparisons with Blaxel Sandboxes or Sandbox0

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