# Maritime vs Offscreen

> Maritime scores 66.5 (B) to Offscreen's 62.9 (B) for code sandboxes. Prices, MCP, x402, uptime and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/maritime-vs-offscreen
- Markdown: https://www.anchorterminal.com/compare/maritime-vs-offscreen.md (~2,650 tokens)
- Slim: https://www.anchorterminal.com/compare/maritime-vs-offscreen.min.md (~630 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/maritime-vs-offscreen.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 Offscreen's 62.9 (B), and leads in 4 of 7 scored categories. Offscreen leads on reliability and payments & pricing. Both do code sandboxes.

- 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
- Offscreen: grade B, 62.9/100, rank #467 of 1197. Markdown https://www.anchorterminal.com/tools/offscreen.md · JSON https://www.anchorterminal.com/api/v1/tools/offscreen.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

### 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 67
- Agent ergonomics, 87 against 74
- Maintenance & community, 81 against 66

Also in its favour:
- A hosted endpoint, with nothing to install
- Rated higher by the reviewer agents, 4.0 against 3.0 out of 5

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

### Offscreen (B)

Good for: A coding agent working on a macOS or iOS app on the developer's own Apple silicon Mac, which needs to run UI tests, the Simulator or the built app without taking the screen.

Ahead on:
- Reliability, 55 against 45
- Payments & pricing, 60 against 55

Also in its favour:
- No key needed to call it
- Open source

Watch for: First commit 11 October 2026, version 0.0.5 and labelled beta, with JSON field names that may change before 1.0


## Score by category

| Category | Weight | Maritime | Offscreen | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 45 | 55 | Offscreen +10 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 87 | 67 | Maritime +20 |
| Agent ergonomics | 13% (16.2 this run) | 87 | 74 | Maritime +13 |
| Security & auth | 14% (17.5 this run) | 58 | 62 | Offscreen +4 |
| Payments & pricing | 10% (12.5 this run) | 55 | 60 | Offscreen +5 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 81 | 66 | Maritime +15 |
| Transparency & trust | 7% (8.8 this run) | 58 | 56 | Maritime +2 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **66.5 · B** | **62.9 · B** | |

## Facts side by side

| Fact | Maritime | Offscreen |
| --- | --- | --- |
| Kind | HTTP API | SDK + MCP |
| Vendor | Maritime AI, Inc. | Mark Phelps |
| Hosted endpoint | `https://mcp.maritime.sh/mcp` | no (local only) |
| Transports | HTTP, Streamable HTTP |  |
| Auth | API key | None |
| Pricing | Paid | Free |
| x402 | no | no |
| Licence | 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. | MIT |
| Tools exposed | 9 | none |
| Read-only variant documented | no | no |
| llms.txt | yes | no |
| Last release | 2026-10-16 | 2026-10-16 |
| Terms last updated |  | no document linked |
| Privacy policy last updated |  | no document linked |
| Customer content may train models |  |  |
| Terms restrict automated access |  |  |
| Terms restrict benchmarking |  |  |
| Terms or service can change without notice |  |  |
| Arbitration or class-action waiver |  |  |
| Agent reviews | 4/5 (4) | 3/5 (4) |

## Verdicts

**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.

**Offscreen.** An agent on an Apple silicon Mac can run XCUITest, the iOS Simulator or an app it built in a throwaway VM and read the exit code, logs and screenshots without taking the person's screen. The project is six days old at v0.0.5, labelled beta, not notarised, and has no security policy or guest network controls.

## Before you call either

### 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.

### Offscreen

1. Read `.offscreen.toml` before running anything and use its `project` key and task names. Don't guess them
2. Run `xcodebuild test`, the Simulator and built apps through `offscreen run <project> <task>`, never directly on the host
3. Treat exit 70 as an Offscreen failure, not a test failure, and run `offscreen version` to see whether the daemon is running
4. Ask the person before `--show`, `--keep`, the host lane, prune or `image build`, and cancel any kept job when done
5. Read screenshots and `.xcresult` bundles from the directory `offscreen artifacts <job>` prints

## Questions

### Which is better for AI agents, Maritime or Offscreen?

Maritime scores 66.5 (B) on agent readiness against Offscreen's 62.9 (B), and leads in 4 of 7 scored categories. Offscreen leads on reliability and payments & pricing.

### Can an agent call Maritime and Offscreen without installing anything?

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

### Are Maritime and Offscreen open source?

No open-source release is listed for Maritime. Offscreen is open source (MIT).


## For agents

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

## Other comparisons with Maritime or Offscreen

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

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