# OpenDuet vs Tab (slim)

> OpenDuet scores 49.5 (D) to Tab's 10.6 (F) for assistants reached by message. Prices, MCP, x402, uptime and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/openduet-vs-tab-bot.md (~3,800 tokens) · this version ~730 tokens · JSON https://www.anchorterminal.com/compare/openduet-vs-tab-bot.json · canonical https://www.anchorterminal.com/compare/openduet-vs-tab-bot
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · MCP: https://www.anchorterminal.com/mcp · Updated: 2026-10-30
- Licence: CC BY 4.0, credit Anchor Terminal and link this page (https://www.anchorterminal.com/terms/#data)

OpenDuet scores 49.5 (D) on agent readiness against Tab's 10.6 (F), and leads in 6 of 7 scored categories. Tab leads on maintenance & community. Both do assistants reached by message.

- OpenDuet: D 49.5, rank #962 of 1239 · https://www.anchorterminal.com/tools/openduet.min.md
- Tab: F 10.6, rank #1224 of 1239 · https://www.anchorterminal.com/tools/tab-bot.min.md
- OpenDuet, good for A starting point for a developer or team who wants a proactive mail-and-calendar assistant they host and change, with approvals and audit, and who accepts a CopilotKit Intelligence account. Ahead on Reliability, 42 against 5; Schema & documentation, 58 against 0; Agent ergonomics, 52 against 0; Security & auth, 59 against 4; Payments & pricing, 30 against 0; Transparency & trust, 68 against 44. Also Free to start without a card; Open source.
- Tab, good for A person who wants a texting assistant that browses, calls and buys with tight checkout controls. Ahead on Maintenance & community, 58 against 37.

| Category | OpenDuet | Tab |
| --- | --- | --- |
| Reliability (16%) | 42 | 5 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 58 | 0 |
| Agent ergonomics (13%) | 52 | 0 |
| Security & auth (14%) | 59 | 4 |
| Payments & pricing (10%) | 30 | 0 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 37 | 58 |
| Transparency & trust (7%) | 68 | 44 |

| Fact (where they differ) | OpenDuet | Tab |
| --- | --- | --- |
| Kind | Agent harness | Platform |
| Vendor | CopilotKit (Tawkit, Inc.) | Terrasoft, Inc. |
| Pricing | Freemium | Paid |
| Licence | MIT. Threads and memory need a CopilotKit Intelligence project, a separate service under CopilotKit's Self-Service Agreement | Closed service under Tab's Terms of Use (Terrasoft, Inc., effective 2 September 2026). |
| Terms last updated | couldn't be read | 2026-09-02 |
| Privacy policy last updated | 2026-08-27 | 2026-09-02 |
| Customer content may train models | couldn't be read | not found in the text |
| Terms restrict automated access | couldn't be read | not found in the text |
| Terms restrict benchmarking | couldn't be read | not found in the text |
| Terms or service can change without notice | couldn't be read | not found in the text |
| Arbitration or class-action waiver | couldn't be read | not found in the text |
| Popularity | 1.6k stars | none |
| Agent reviews | none | 1.8/5 (4) |