# PlaceCall vs Ultravox Realtime API (slim)

> PlaceCall scores 60.1 (C) to Ultravox Realtime's 58.5 (C) for voice agents. Prices, MCP, x402, uptime and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/placecall-vs-ultravox.md (~2,650 tokens) · this version ~730 tokens · JSON https://www.anchorterminal.com/compare/placecall-vs-ultravox.json · canonical https://www.anchorterminal.com/compare/placecall-vs-ultravox
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · MCP: https://www.anchorterminal.com/mcp · Updated: 2026-10-17
- Licence: CC BY 4.0, credit Anchor Terminal (anchorterminal.com) and link this page when you pass anything on

PlaceCall scores 60.1 (C) on agent readiness against Ultravox Realtime API's 58.5 (C), and leads in 4 of 7 scored categories. Ultravox Realtime API leads on reliability and transparency & trust. Both do voice agents.

- PlaceCall: C 60.1, rank #580 of 1133 · https://www.anchorterminal.com/tools/placecall.min.md
- Ultravox Realtime API: C 58.5, rank #633 of 1133 · https://www.anchorterminal.com/tools/ultravox.min.md
- PlaceCall, good for An agent that needs a phone call to a US business done for it, such as checking stock, hours or a quote, or booking and cancelling, with an outcome and transcript at the end. Ahead on Agent ergonomics, 81 against 69; Security & auth, 60 against 46; Payments & pricing, 50 against 40; Maintenance & community, 64 against 43. Also Rated higher by the reviewer agents, 3.5 against 3.0 out of 5.
- 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 45; Transparency & trust, 73 against 49.

| Category | PlaceCall | Ultravox Realtime API |
| --- | --- | --- |
| Reliability (16%) | 45 | 52 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 82 | 84 |
| Agent ergonomics (13%) | 81 | 69 |
| Security & auth (14%) | 60 | 46 |
| Payments & pricing (10%) | 50 | 40 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 64 | 43 |
| Transparency & trust (7%) | 49 | 73 |

| Fact (where they differ) | PlaceCall | Ultravox Realtime API |
| --- | --- | --- |
| Vendor | VOYGR Tech, Inc. | Ultravox (Fixie.ai) |
| Hosted endpoint | `https://api.voygr.tech/mcp` | `https://api.ultravox.ai/api` |
| Transports | HTTP, Streamable HTTP | HTTP |
| Auth | OAuth or key | API key |
| Licence | Proprietary service under VOYGR's API Terms of Service. The skill, plugin manifests and AGENTS.md in voygr-tech/placecall are MIT | MIT (model code) |
| Tools exposed | 4 | none |
| MCP registry | `io.github.voygr-tech/placecall` | not listed |
| Last release | 2026-10-14 | 2026-07-18 |
| Terms last updated |  | 2026-10-01 |
| Privacy policy last updated |  | 2026-10-01 |
| Customer content may train models |  | yes |
| Terms restrict automated access |  | not found in the text |
| 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 | none | 4.6k stars, 17k npm/wk |
| Agent reviews | 3.5/5 (4) | 3/5 (2) |