# Deno Sandbox vs Microsoft Execution Containers (slim)

> Microsoft Execution Containers scores 76.3 (BB) on agent readiness against Deno Sandbox's 50.3 (D), and leads in every scored category. Both do sandbox code. Category scores, facts, verdicts and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/deno-sandbox-vs-microsoft-execution-containers.md (~2,800 tokens) · this version ~730 tokens · JSON https://www.anchorterminal.com/compare/deno-sandbox-vs-microsoft-execution-containers.json · canonical https://www.anchorterminal.com/compare/deno-sandbox-vs-microsoft-execution-containers
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-09

Microsoft Execution Containers scores 76.3 (BB) on agent readiness against Deno Sandbox's 50.3 (D), and leads in every scored category. Both do sandbox code.

- Deno Sandbox: D 50.3, rank #689 of 842 · https://www.anchorterminal.com/tools/deno-sandbox.min.md
- Microsoft Execution Containers: BB 76.3, rank #35 of 842 · https://www.anchorterminal.com/tools/microsoft-execution-containers.min.md
- Deno Sandbox, 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.
- 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 48; Schema & documentation, 81 against 66; Agent ergonomics, 74 against 60; Security & auth, 69 against 61; Payments & pricing, 60 against 20; Maintenance & community, 92 against 45; Transparency & trust, 83 against 58. Also Agent-ready, a grade of BB or better; No key needed to call it; Free to start without a card; Open source.

| Category | Deno Sandbox | Microsoft Execution Containers |
| --- | --- | --- |
| Reliability (16%) | 48 | 81 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 66 | 81 |
| Agent ergonomics (13%) | 60 | 74 |
| Security & auth (14%) | 61 | 69 |
| Payments & pricing (10%) | 20 | 60 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 45 | 92 |
| Transparency & trust (7%) | 58 | 83 |

| Fact (where they differ) | Deno Sandbox | Microsoft Execution Containers |
| --- | --- | --- |
| Kind | HTTP API | SDK + MCP |
| Vendor | Deno Land Inc. | Microsoft |
| Transports | HTTP |  |
| Auth | API key | None |
| Pricing | Paid | Free |
| Licence | Proprietary service under the Deno Deploy terms and conditions. The `@deno/sandbox` and `deno-sandbox` SDKs are MIT | MIT |
| llms.txt | yes | no |
| Last release | 2026-07-22 | 2026-10-06 |
| Terms last updated | 2026-09-30 | no document linked |
| Privacy policy last updated | 2026-09-30 | couldn't be read |
| 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 | 1.5k stars, 472k npm/wk |