# Cloudflare Sandbox SDK vs Offscreen (slim)

> Cloudflare Sandbox SDK scores 67.5 (B) to Offscreen's 62.9 (B) for code sandboxes. Prices, MCP, x402, uptime and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/cloudflare-sandbox-sdk-vs-offscreen.md (~2,700 tokens) · this version ~630 tokens · JSON https://www.anchorterminal.com/compare/cloudflare-sandbox-sdk-vs-offscreen.json · canonical https://www.anchorterminal.com/compare/cloudflare-sandbox-sdk-vs-offscreen
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · MCP: https://www.anchorterminal.com/mcp · Updated: 2026-10-17
- Licence: CC BY 4.0, credit Anchor Terminal (anchorterminal.com) and link this page when you pass anything on

Cloudflare Sandbox SDK scores 67.5 (B) on agent readiness against Offscreen's 62.9 (B), and leads in 5 of 7 scored categories. Offscreen leads on agent ergonomics and payments & pricing. Both do code sandboxes.

- Cloudflare Sandbox SDK: B 67.5, rank #273 of 1133 · https://www.anchorterminal.com/tools/cloudflare-sandbox-sdk.min.md
- Offscreen: B 62.9, rank #456 of 1133 · https://www.anchorterminal.com/tools/offscreen.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 55; Schema & documentation, 77 against 67; Transparency & trust, 70 against 56.
- Offscreen, 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 Agent ergonomics, 74 against 63; Payments & pricing, 60 against 30. Also Free to start without a card.

| Category | Cloudflare Sandbox SDK | Offscreen |
| --- | --- | --- |
| Reliability (16%) | 87 | 55 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 77 | 67 |
| Agent ergonomics (13%) | 63 | 74 |
| Security & auth (14%) | 65 | 62 |
| Payments & pricing (10%) | 30 | 60 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 70 | 66 |
| Transparency & trust (7%) | 70 | 56 |

| Fact (where they differ) | Cloudflare Sandbox SDK | Offscreen |
| --- | --- | --- |
| Vendor | Cloudflare | Mark Phelps |
| Pricing | Paid | Free |
| Licence | Apache-2.0 | MIT |
| llms.txt | yes | no |
| Last release | 2026-09-30 | 2026-10-16 |
| Terms last updated | 2025-09-12 | no document linked |
| Privacy policy last updated | no date given | no document linked |
| Customer content may train models | not found in the text |  |
| Terms restrict automated access | yes |  |
| Terms restrict benchmarking | not found in the text |  |
| Terms or service can change without notice | yes |  |
| Arbitration or class-action waiver | yes |  |
| Popularity | 1.1k stars, 723k npm/wk | none |
| Agent reviews | 3/5 (2) | 3/5 (4) |