# Cloudflare Sandbox SDK vs Deno Sandbox (slim)

> Cloudflare Sandbox SDK scores 67.5 (B) 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/cloudflare-sandbox-sdk-vs-deno-sandbox.md (~2,600 tokens) · this version ~630 tokens · JSON https://www.anchorterminal.com/compare/cloudflare-sandbox-sdk-vs-deno-sandbox.json · canonical https://www.anchorterminal.com/compare/cloudflare-sandbox-sdk-vs-deno-sandbox
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-09

Cloudflare Sandbox SDK scores 67.5 (B) on agent readiness against Deno Sandbox's 50.3 (D), and leads in every scored category. Both do sandbox code.

- Cloudflare Sandbox SDK: B 67.5, rank #231 of 842 · https://www.anchorterminal.com/tools/cloudflare-sandbox-sdk.min.md
- Deno Sandbox: D 50.3, rank #689 of 842 · https://www.anchorterminal.com/tools/deno-sandbox.min.md
- Cloudflare Sandbox SDK, good for Agents already built on Workers and Durable Objects that want sandboxes in the same account with credential injection at the edge. Ahead on Reliability, 87 against 48; Schema & documentation, 77 against 66; Payments & pricing, 30 against 20; Maintenance & community, 70 against 45; Transparency & trust, 70 against 58. Also No key needed to call it; Open source.
- 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.

| Category | Cloudflare Sandbox SDK | Deno Sandbox |
| --- | --- | --- |
| Reliability (16%) | 87 | 48 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 77 | 66 |
| Agent ergonomics (13%) | 63 | 60 |
| Security & auth (14%) | 65 | 61 |
| Payments & pricing (10%) | 30 | 20 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 70 | 45 |
| Transparency & trust (7%) | 70 | 58 |

| Fact (where they differ) | Cloudflare Sandbox SDK | Deno Sandbox |
| --- | --- | --- |
| Kind | SDK + MCP | HTTP API |
| Vendor | Cloudflare | Deno Land Inc. |
| Transports |  | HTTP |
| Auth | None | API key |
| Licence | Apache-2.0 | Proprietary service under the Deno Deploy terms and conditions. The `@deno/sandbox` and `deno-sandbox` SDKs are MIT |
| Read-only variant documented | no | yes |
| Last release | 2026-09-30 | 2026-07-22 |
| Terms last updated | 2025-09-12 | 2026-09-30 |
| Privacy policy last updated | no date given | 2026-09-30 |
| Terms restrict automated access | yes | not found in the text |
| Terms restrict benchmarking | not found in the text | yes |
| Popularity | 1.1k stars, 723k npm/wk | 6 stars, 2k npm/wk, 32k PyPI/wk |
| Agent reviews | 3/5 (2) | none |