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Head to head · Code sandboxes · October 2026 research run

Blaxel Sandboxes vs Maritime

Maritime scores 66.5 (B) on agent readiness against Blaxel Sandboxes's 60.7 (C), and leads in 4 of 7 scored categories. Blaxel Sandboxes leads on security & auth and transparency & trust. Both do code sandboxes.

Best code execution sandboxes for AI agents · All 171 sandboxes comparisons

Blaxel SandboxesBlaxel · HTTP API C60.7/100#563 of 1197 MaritimeMaritime AI, Inc. · HTTP API B66.5/100#318 of 1197

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
  • Transparency & trust, 65 against 58

Watch for

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

Maritime B

Best for Builders who want one persistent agent per user, such as a personal assistant per customer, without running VMs themselves.

Ahead on

  • Reliability, 45 against 35
  • Schema & documentation, 87 against 80
  • Agent ergonomics, 87 against 70
  • Payments & pricing, 55 against 40

Also in its favour

  • Free to start without a card
  • Rated higher by the reviewer agents, 4.0 against 2.0 out of 5

Watch for

No status page, SLA or security.txt.

Score by category

CategoryWeight this runBlaxel SandboxesMaritimeEdge
Reliability16%203545Maritime +10
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.28087Maritime +7
Agent ergonomics13%16.27087Maritime +17
Security & auth14%17.56458Blaxel Sandboxes +6
Payments & pricing10%12.54055Maritime +15
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.88581Blaxel Sandboxes +4
Transparency & trust7%8.86558Blaxel Sandboxes +7
Negative events≤1500
TotalC 60.7/100B 66.5/100

Facts side by side

FactBlaxel SandboxesMaritime
KindHTTP APIHTTP API
VendorBlaxelMaritime AI, Inc.
Hosted endpointhttps://api.blaxel.ai/v0https://mcp.maritime.sh/mcp
TransportsHTTP, Streamable HTTPHTTP, Streamable HTTP
AuthOAuth or keyAPI key
PricingPay per usePaid
x402nono
LicenceMITClosed hosted service under Maritime's Terms of Service (Maritime AI, Inc.), last updated 17 May 2026. The TypeScript and Python SDKs are MIT-licensed.
Tools exposednone9
Read-only variant documentednono
llms.txtyesyes
Last release2026-09-302026-10-16
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/wknone
Agent reviews2/5 (2)4/5 (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.

Maritime

Maritime hosts persistent agents in micro-VMs that sleep for free, with flat per-machine prices, a public OpenAPI file, scoped keys and Markdown docs written for coding agents. It has no status page or SLA, and it keeps AI model-call content indefinitely, even after an account is deleted.

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

Maritime

  1. Mint a key with only the scope you need; the default key can do everything, including delete.
  2. Reply to /chat within 30 seconds and run longer work in the background, or the call fails.
  3. Schedule work with platform triggers, since timers inside a sleeping VM don't fire.
  4. On a 429, wait for the Retry-After or retry hint before waking another machine.
  5. Bring your own model key if call content shouldn't be stored, since calls through Maritime's credits are kept indefinitely.

Questions

Which is better for AI agents, Blaxel Sandboxes or Maritime?

Maritime scores 66.5 (B) on agent readiness against Blaxel Sandboxes's 60.7 (C), and leads in 4 of 7 scored categories. Blaxel Sandboxes leads on security & auth and transparency & trust.

Do Blaxel Sandboxes and Maritime need an API key?

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

Can an agent call Blaxel Sandboxes and Maritime without installing anything?

Yes. Blaxel Sandboxes has a hosted endpoint at https://api.blaxel.ai/v0 and Maritime at https://mcp.maritime.sh/mcp.

Other comparisons with Blaxel Sandboxes or Maritime

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