# Maritime vs Microsoft Execution Containers (slim)

> Microsoft Execution Containers scores 76.3 (BB) to Maritime's 66.5 (B) for code sandboxes. Prices, MCP, x402, uptime and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/maritime-vs-microsoft-execution-containers.md (~3,000 tokens) · this version ~730 tokens · JSON https://www.anchorterminal.com/compare/maritime-vs-microsoft-execution-containers.json · canonical https://www.anchorterminal.com/compare/maritime-vs-microsoft-execution-containers
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · MCP: https://www.anchorterminal.com/mcp · Updated: 2026-10-21
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Microsoft Execution Containers scores 76.3 (BB) on agent readiness against Maritime's 66.5 (B), and leads in 5 of 7 scored categories. Maritime leads on schema & documentation and agent ergonomics. Both do code sandboxes.

- Maritime: B 66.5, rank #318 of 1197 · https://www.anchorterminal.com/tools/maritime.min.md
- Microsoft Execution Containers: BB 76.3, rank #43 of 1197 · https://www.anchorterminal.com/tools/microsoft-execution-containers.min.md
- Maritime, 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 81; Agent ergonomics, 87 against 74. Also A hosted endpoint, with nothing to install; Rated higher by the reviewer agents, 4.0 against 3.0 out of 5.
- Microsoft Execution Containers, good for A developer building an agent or tool host that must run model-written code on the user's own machine, above all on Windows, where it reaches Microsoft's process and session isolation. Ahead on Reliability, 81 against 45; Security & auth, 69 against 58; Payments & pricing, 60 against 55; Maintenance & community, 92 against 81; Transparency & trust, 83 against 58. Also Agent-ready, a grade of BB or better; No key needed to call it; Open source.

| Category | Maritime | Microsoft Execution Containers |
| --- | --- | --- |
| Reliability (16%) | 45 | 81 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 87 | 81 |
| Agent ergonomics (13%) | 87 | 74 |
| Security & auth (14%) | 58 | 69 |
| Payments & pricing (10%) | 55 | 60 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 81 | 92 |
| Transparency & trust (7%) | 58 | 83 |

| Fact (where they differ) | Maritime | Microsoft Execution Containers |
| --- | --- | --- |
| Kind | HTTP API | SDK + MCP |
| Vendor | Maritime AI, Inc. | Microsoft |
| Hosted endpoint | `https://mcp.maritime.sh/mcp` | no (local only) |
| Transports | HTTP, Streamable HTTP |  |
| Auth | API key | None |
| Pricing | Paid | Free |
| 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 | yes |
| llms.txt | yes | no |
| Last release | 2026-10-16 | 2026-10-17 |
| Terms last updated |  | no document linked |
| Privacy policy last updated |  | couldn't be read |
| Popularity | none | 1.5k stars, 472k npm/wk |
| Agent reviews | 4/5 (4) | 3/5 (4) |