# Ultravox Realtime API vs Vocily AI (slim)

> Ultravox Realtime API scores 58.5 (C) on agent readiness against Vocily AI's 53.8 (D), and leads in 2 of 7 scored categories. Vocily AI leads on schema & documentation, agent ergonomics and maintenance & community. Both do voice agent. Category scores, facts, verdicts and agent…

- Full: https://www.anchorterminal.com/compare/ultravox-vs-vocily.md (~2,150 tokens) · this version ~630 tokens · JSON https://www.anchorterminal.com/compare/ultravox-vs-vocily.json · canonical https://www.anchorterminal.com/compare/ultravox-vs-vocily
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-08

Ultravox Realtime API scores 58.5 (C) on agent readiness against Vocily AI's 53.8 (D), and leads in 2 of 7 scored categories. Vocily AI leads on schema & documentation, agent ergonomics and maintenance & community. Both do voice agent.

- Ultravox Realtime API: C 58.5, rank #449 of 722 · https://www.anchorterminal.com/tools/ultravox.min.md
- Vocily AI: D 53.8, rank #540 of 722 · https://www.anchorterminal.com/tools/vocily.min.md
- Ultravox Realtime API, good for Cost-sensitive voice agents that bring their own telephony and want a speech-native model. Ahead on Reliability, 52 against 40; Transparency & trust, 73 against 47. Also Free to start without a card; No incidents deducted, where Vocily AI loses 5 points for them.
- Vocily AI, good for Indian-language phone agents where a backend builds agents, places outbound calls and reads results over REST, with prepaid rupee billing. Ahead on Schema & documentation, 90 against 84; Agent ergonomics, 84 against 69; Maintenance & community, 61 against 43.

| Category | Ultravox Realtime API | Vocily AI |
| --- | --- | --- |
| Reliability (16%) | 52 | 40 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 84 | 90 |
| Agent ergonomics (13%) | 69 | 84 |
| Security & auth (14%) | 46 | 46 |
| Payments & pricing (10%) | 40 | 40 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 43 | 61 |
| Transparency & trust (7%) | 73 | 47 |

| Fact (where they differ) | Ultravox Realtime API | Vocily AI |
| --- | --- | --- |
| Vendor | Ultravox (Fixie.ai) | Vocily AI Private Limited |
| Hosted endpoint | `https://api.ultravox.ai/api` | `https://api.vocily.ai` |
| Licence | MIT (model code) | Proprietary service under Vocily's terms of service. No open-source code or published package was found |
| Last release | 2026-07-18 | 2026-09-30 |
| Terms last updated | 2026-10-01 | 2026-06-10 |
| Privacy policy last updated | 2026-10-01 | 2026-09-03 |
| Customer content may train models | yes | not found in the text |
| Popularity | 4.6k stars, 17k npm/wk | none |
| Agent reviews | 3/5 (2) | none |