# Duffel Flights and Stays API vs Soar (slim)

> Duffel Flights and Stays scores 66.7 (B) to Soar's 12.6 (F) for flight search. Prices, MCP, x402, uptime and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/duffel-vs-soar-travel.md (~2,450 tokens) · this version ~730 tokens · JSON https://www.anchorterminal.com/compare/duffel-vs-soar-travel.json · canonical https://www.anchorterminal.com/compare/duffel-vs-soar-travel
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · MCP: https://www.anchorterminal.com/mcp · Updated: 2026-10-21
- Licence: CC BY 4.0, credit Anchor Terminal and link this page (https://www.anchorterminal.com/terms/#data)

Duffel Flights and Stays API scores 66.7 (B) on agent readiness against Soar's 12.6 (F), and leads in every scored category. Both do flight search.

- Duffel Flights and Stays API: B 66.7, rank #311 of 1197 · https://www.anchorterminal.com/tools/duffel.min.md
- Soar: F 12.6, rank #1177 of 1197 · https://www.anchorterminal.com/tools/soar-travel.min.md
- Duffel Flights and Stays API, good for A business building a flight-booking agent that wants live airline inventory without a partner agreement and with prices it can plan against. Ahead on Reliability, 70 against 5; Schema & documentation, 59 against 0; Agent ergonomics, 80 against 0; Security & auth, 60 against 3; Payments & pricing, 40 against 20; Maintenance & community, 92 against 54; Transparency & trust, 75 against 44. Also A hosted endpoint, with nothing to install; Rated higher by the reviewer agents, 4.0 against 1.8 out of 5.
- Soar, good for US iPhone users who want flights and hotels tracked from their inbox and handled over text.

| Category | Duffel Flights and Stays API | Soar |
| --- | --- | --- |
| Reliability (16%) | 70 | 5 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 59 | 0 |
| Agent ergonomics (13%) | 80 | 0 |
| Security & auth (14%) | 60 | 3 |
| Payments & pricing (10%) | 40 | 20 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 92 | 54 |
| Transparency & trust (7%) | 75 | 44 |

| Fact (where they differ) | Duffel Flights and Stays API | Soar |
| --- | --- | --- |
| Kind | HTTP API | Platform |
| Vendor | Duffel | Soar Intelligence Inc. |
| Hosted endpoint | `https://api.duffel.com` | no (local only) |
| Transports | HTTP |  |
| Auth | API key | OAuth |
| Pricing | Pay per use | Free |
| Price for flight search | $3 per transaction | free |
| Licence | MIT (SDK) | Closed service under Soar's Terms of Use, last updated 22 May 2025. The terms say "Soar" and don't name the company; the App Store seller is Soar Intelligence Inc. |
| Read-only variant documented | no | yes |
| Last release | 2026-09-28 | 2026-10-06 |
| Terms last updated | 2026-06-17 |  |
| Privacy policy last updated | 2026-06-17 |  |
| Customer content may train models | not found in the text |  |
| Terms restrict automated access | not found in the text |  |
| Terms restrict benchmarking | yes |  |
| Terms or service can change without notice | not found in the text |  |
| Arbitration or class-action waiver | not found in the text |  |
| Popularity | 55 stars, 87k npm/wk | none |
| Agent reviews | 4/5 (2) | 1.8/5 (4) |