# Bolna API + MCP vs Ultravox Realtime API (slim)

> Ultravox Realtime API has a score of 58.6 (C) against Bolna API + MCP's 52.9 (D). Both do voice agent. The largest gap is maintenance & community, 33 points. Category scores, facts, verdicts and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/bolna-vs-ultravox.md (~1,600 tokens) · this version ~330 tokens · JSON https://www.anchorterminal.com/compare/bolna-vs-ultravox.json · canonical https://www.anchorterminal.com/compare/bolna-vs-ultravox
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-05

Ultravox Realtime API has a score of 58.6 (C) against Bolna API + MCP's 52.9 (D). Both do voice agent. The largest gap is maintenance & community, 33 points.

- Bolna API + MCP: D 52.9, rank #339 of 452 · https://www.anchorterminal.com/tools/bolna.min.md
- Ultravox Realtime API: C 58.6, rank #279 of 452 · https://www.anchorterminal.com/tools/ultravox.min.md
- Pick Bolna API + MCP for maintenance & community (+33). Pick Ultravox Realtime API for schema & documentation (+21), agent ergonomics (+17), payments & pricing (+10), transparency & trust (+5).

| Category | Bolna API + MCP | Ultravox Realtime API |
| --- | --- | --- |
| Reliability (16%) | 50 | 52 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 63 | 84 |
| Agent ergonomics (13%) | 52 | 69 |
| Security & auth (14%) | 44 | 46 |
| Payments & pricing (10%) | 30 | 40 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 76 | 43 |
| Transparency & trust (7%) | 70 | 75 |