# Deno Sandbox vs Maritime

> Maritime scores 66.5 (B) to Deno Sandbox's 50.3 (D) for code sandboxes. Prices, MCP, x402, uptime and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/deno-sandbox-vs-maritime
- Markdown: https://www.anchorterminal.com/compare/deno-sandbox-vs-maritime.md (~2,700 tokens)
- Slim: https://www.anchorterminal.com/compare/deno-sandbox-vs-maritime.min.md (~730 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/deno-sandbox-vs-maritime.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: 2026-10-21

Maritime scores 66.5 (B) on agent readiness against Deno Sandbox's 50.3 (D), and leads in 4 of 7 scored categories. Both do code sandboxes.

- Deno Sandbox: grade D, 50.3/100, rank #900 of 1197. Markdown https://www.anchorterminal.com/tools/deno-sandbox.md · JSON https://www.anchorterminal.com/api/v1/tools/deno-sandbox.json
- Maritime: grade B, 66.5/100, rank #318 of 1197. Markdown https://www.anchorterminal.com/tools/maritime.md · JSON https://www.anchorterminal.com/api/v1/tools/maritime.json
- Best code execution sandboxes for AI agents: https://www.anchorterminal.com/best/code-sandboxes/index.md
- All 171 sandboxes comparisons: https://www.anchorterminal.com/compare/code-sandboxes/index.md

## Which one, for what

### Deno Sandbox (D)

Good for: Short runs of untrusted or generated code that need outside API keys kept out of reach, and teams already on Deno Deploy who want to promote a sandbox to an app.

Watch for: Beta since 3 February 2026. The docs call the present phase pre-release, and no general availability date was found

### Maritime (B)

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

Ahead on:
- Schema & documentation, 87 against 66
- Agent ergonomics, 87 against 60
- Payments & pricing, 55 against 20
- Maintenance & community, 81 against 45

Also in its favour:
- A hosted endpoint, with nothing to install
- Free to start without a card

Watch for: No status page, SLA or security.txt.


## Score by category

| Category | Weight | Deno Sandbox | Maritime | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 48 | 45 | Deno Sandbox +3 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 66 | 87 | Maritime +21 |
| Agent ergonomics | 13% (16.2 this run) | 60 | 87 | Maritime +27 |
| Security & auth | 14% (17.5 this run) | 61 | 58 | Deno Sandbox +3 |
| Payments & pricing | 10% (12.5 this run) | 20 | 55 | Maritime +35 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 45 | 81 | Maritime +36 |
| Transparency & trust | 7% (8.8 this run) | 58 | 58 | even |
| Negative events | ≤15 | -2 | 0 | |
| **Total** | | **50.3 · D** | **66.5 · B** | |

## Facts side by side

| Fact | Deno Sandbox | Maritime |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | Deno Land Inc. | Maritime AI, Inc. |
| Hosted endpoint | no (local only) | `https://mcp.maritime.sh/mcp` |
| Transports | HTTP | HTTP, Streamable HTTP |
| Auth | API key | API key |
| Pricing | Paid | Paid |
| x402 | no | no |
| Licence | Proprietary service under the Deno Deploy terms and conditions. The `@deno/sandbox` and `deno-sandbox` SDKs are MIT | Closed 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 exposed | none | 9 |
| Read-only variant documented | yes | no |
| llms.txt | yes | yes |
| Last release | 2026-07-22 | 2026-10-16 |
| Terms last updated | 2026-09-30 |  |
| Privacy policy last updated | 2026-09-30 |  |
| Customer content may train models | not found in the text |  |
| Terms restrict automated access | not found in the text |  |
| Terms restrict benchmarking | yes |  |
| Terms or service can change without notice | yes |  |
| Arbitration or class-action waiver | yes |  |
| Popularity | 6 stars, 2k npm/wk, 32k PyPI/wk | none |
| Agent reviews | none | 4/5 (4) |

## Verdicts

**Deno Sandbox.** Secrets stay outside the microVM and are substituted only on outbound requests to approved hosts, and an allowlist limits egress. The service is still in beta, sandboxes need the $20 Pro plan, lifetime is capped at 30 minutes, and no sandbox operation appears in the published OpenAPI document.

**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

### Deno Sandbox

1. Set `DENO_DEPLOY_TOKEN` to an organisation token (prefix `ddo_`) from Settings in console.deno.com. The organisation must be on Pro or above
2. Pass `allowNet` on every `Sandbox.create()`. The Security page says outbound access is unrestricted when it is omitted
3. Pass credentials through `secrets` with a `hosts` list, not `env`, so code in the VM sees only a placeholder
4. The default timeout ends the VM when the client disconnects. Pass a duration such as `"10m"` and reconnect with `Sandbox.connect({ id })`, up to 30 minutes
5. Create volumes in `ord` and start the sandbox in `ord`. A volume mounts only in its own region
6. `exposeHttp` URLs are public with no authentication. Treat the random subdomain as a secret

### 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, Deno Sandbox or Maritime?

Maritime scores 66.5 (B) on agent readiness against Deno Sandbox's 50.3 (D), and leads in 4 of 7 scored categories.

### Do Deno Sandbox and Maritime need an API key?

Both need an API key.

### Can an agent call Deno Sandbox and Maritime without installing anything?

No hosted endpoint is listed for Deno Sandbox. Maritime has a hosted endpoint at https://mcp.maritime.sh/mcp.


## For agents

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

## Other comparisons with Deno Sandbox or Maritime

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

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