# Pi vs Unstoppable (slim)

> Pi scores 68.6 (B) to Unstoppable's 34.9 (F) for agent harnesses. Prices, MCP, x402, uptime and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/earendil-pi-vs-unstoppable.md (~3,550 tokens) · this version ~580 tokens · JSON https://www.anchorterminal.com/compare/earendil-pi-vs-unstoppable.json · canonical https://www.anchorterminal.com/compare/earendil-pi-vs-unstoppable
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · MCP: https://www.anchorterminal.com/mcp · Updated: 2026-10-28
- Licence: CC BY 4.0, credit Anchor Terminal and link this page (https://www.anchorterminal.com/terms/#data)

Pi scores 68.6 (B) on agent readiness against Unstoppable's 34.9 (F), and leads in every scored category. Both do agent harnesses.

- Pi: B 68.6, rank #236 of 1218 · https://www.anchorterminal.com/tools/earendil-pi.min.md
- Unstoppable: F 34.9, rank #1133 of 1218 · https://www.anchorterminal.com/tools/unstoppable.min.md
- Pi, good for Developers and pipelines that want a small, scriptable coding agent they can extend in TypeScript and drive over JSONL or RPC, inside their own container. Ahead on Reliability, 75 against 45; Schema & documentation, 84 against 30; Agent ergonomics, 76 against 5; Security & auth, 61 against 36; Payments & pricing, 60 against 30; Maintenance & community, 87 against 58; Transparency & trust, 67 against 58. Also Open source.
- Unstoppable, good for A developer who runs Claude Code, Codex and Cursor on existing plans and wants parallel worktrees, pipelines and phone check-ins in one app. Also No incidents deducted, where Pi loses 4 points for them.

| Category | Pi | Unstoppable |
| --- | --- | --- |
| Reliability (16%) | 75 | 45 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 84 | 30 |
| Agent ergonomics (13%) | 76 | 5 |
| Security & auth (14%) | 61 | 36 |
| Payments & pricing (10%) | 60 | 30 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 87 | 58 |
| Transparency & trust (7%) | 67 | 58 |

| Fact (where they differ) | Pi | Unstoppable |
| --- | --- | --- |
| Vendor | Earendil | Unstoppable Domains, Inc. |
| Pricing | Free | Freemium |
| Licence | MIT | Proprietary, under Unstoppable Domains, Inc.'s Terms of Service. No source published |
| llms.txt | no | yes |
| Last release | 2026-10-21 | 2026-10-23 |
| Terms last updated | no document linked |  |
| Privacy policy last updated | no document linked |  |
| Popularity | 113k stars, 5.2M npm/wk | none |
| Agent reviews | 3.3/5 (4) | none |