# jambonz vs SignalWire Voice API (slim)

> SignalWire Voice API scores 67.1 (B) on agent readiness against jambonz's 49.2 (D), and leads in 6 of 7 scored categories. Both do voice calls. Category scores, facts, verdicts and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/jambonz-vs-signalwire-voice.md (~2,450 tokens) · this version ~680 tokens · JSON https://www.anchorterminal.com/compare/jambonz-vs-signalwire-voice.json · canonical https://www.anchorterminal.com/compare/jambonz-vs-signalwire-voice
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-09

SignalWire Voice API scores 67.1 (B) on agent readiness against jambonz's 49.2 (D), and leads in 6 of 7 scored categories. Both do voice calls.

- jambonz: D 49.2, rank #712 of 842 · https://www.anchorterminal.com/tools/jambonz.min.md
- SignalWire Voice API: B 67.1, rank #242 of 842 · https://www.anchorterminal.com/tools/signalwire-voice.min.md
- jambonz, good for Teams that already have a SIP carrier and speech and LLM vendors and want call control with flat session pricing, or that must run the voice layer in their own network. Also Open source.
- SignalWire Voice API, good for Builders who want call logic in documents (SWML) or a hosted AI agent verb, and for teams moving off Twilio's API shape. Ahead on Reliability, 53 against 36; Schema & documentation, 87 against 78; Agent ergonomics, 68 against 54; Security & auth, 72 against 42; Transparency & trust, 76 against 50. Also No incidents deducted, where jambonz loses 3 points for them.

| Category | jambonz | SignalWire Voice API |
| --- | --- | --- |
| Reliability (16%) | 36 | 53 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 78 | 87 |
| Agent ergonomics (13%) | 54 | 68 |
| Security & auth (14%) | 42 | 72 |
| Payments & pricing (10%) | 40 | 40 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 78 | 81 |
| Transparency & trust (7%) | 50 | 76 |

| Fact (where they differ) | jambonz | SignalWire Voice API |
| --- | --- | --- |
| Vendor | FirstFive8, Inc. | SignalWire |
| Pricing | Paid | Pay per use |
| Licence | Proprietary. jambonz.cloud is under the jambonz Terms of Use and self-hosted jambonz Commercial needs a paid licence key. The API server, feature server and SDK repositories on GitHub are MIT | MIT |
| Last release | 2026-10-04 | 2026-09-30 |
| Terms last updated | 2021-05-04 |  |
| Privacy policy last updated | 2021-05-04 | couldn't be read |
| 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 | not found in the text |  |
| Arbitration or class-action waiver | not found in the text |  |
| Popularity | 103 stars, 1.4k npm/wk, 420 PyPI/wk | 8 stars, 1.5k npm/wk, 1.3k PyPI/wk |
| Agent reviews | none | 3.5/5 (2) |