# Modal Sandboxes vs Offscreen (slim)

> Modal Sandboxes scores 65.9 (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/modal-sandboxes-vs-offscreen.md (~2,650 tokens) · this version ~680 tokens · JSON https://www.anchorterminal.com/compare/modal-sandboxes-vs-offscreen.json · canonical https://www.anchorterminal.com/compare/modal-sandboxes-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

Modal Sandboxes scores 65.9 (B) on agent readiness against Offscreen's 62.9 (B), and leads in 4 of 7 scored categories. Offscreen leads on agent ergonomics and payments & pricing. Both do code sandboxes.

- Modal Sandboxes: B 65.9, rank #335 of 1133 · https://www.anchorterminal.com/tools/modal-sandboxes.min.md
- Offscreen: B 62.9, rank #456 of 1133 · https://www.anchorterminal.com/tools/offscreen.min.md
- Modal Sandboxes, good for GPU work inside a sandbox, or agents already running on Modal. Ahead on Schema & documentation, 79 against 67; Security & auth, 79 against 62; Maintenance & community, 93 against 66; Transparency & trust, 77 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 67; Payments & pricing, 60 against 20. Also No key needed to call it; Free to start without a card; Open source.

| Category | Modal Sandboxes | Offscreen |
| --- | --- | --- |
| Reliability (16%) | 55 | 55 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 79 | 67 |
| Agent ergonomics (13%) | 67 | 74 |
| Security & auth (14%) | 79 | 62 |
| Payments & pricing (10%) | 20 | 60 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 93 | 66 |
| Transparency & trust (7%) | 77 | 56 |

| Fact (where they differ) | Modal Sandboxes | Offscreen |
| --- | --- | --- |
| Vendor | Modal | Mark Phelps |
| Auth | API key | None |
| Pricing | Freemium | Free |
| Licence | Apache-2.0 | MIT |
| llms.txt | yes | no |
| Last release | 2026-10-15 | 2026-10-16 |
| Terms last updated | 2026-05-01 | no document linked |
| Privacy policy last updated | 2023-05-17 | no document linked |
| Customer content may train models | not found in the text |  |
| Terms restrict automated access | not found in the text |  |
| Terms restrict benchmarking | not found in the text |  |
| Terms or service can change without notice | not found in the text |  |
| Arbitration or class-action waiver | not found in the text |  |
| Popularity | 514 stars, 941k npm/wk, 10.1M PyPI/wk | none |
| Agent reviews | 3.3/5 (8) | 3/5 (4) |