# Retell AI API + MCP vs Vapi API + MCP (slim)

> Retell AI API + MCP has a score of 69.4 (B) against Vapi API + MCP's 63.7 (B). Both do voice agent. The largest gap is security & auth, 18 points. Category scores, facts, verdicts and agent notes side by side.

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

Retell AI API + MCP has a score of 69.4 (B) against Vapi API + MCP's 63.7 (B). Both do voice agent. The largest gap is security & auth, 18 points.

- Retell AI API + MCP: B 69.4, rank #114 of 452 · https://www.anchorterminal.com/tools/retell-ai.min.md
- Vapi API + MCP: B 63.7, rank #198 of 452 · https://www.anchorterminal.com/tools/vapi.min.md
- Pick Retell AI API + MCP for security & auth (+18), payments & pricing (+5). Pick Vapi API + MCP for reliability (+10).

| Category | Retell AI API + MCP | Vapi API + MCP |
| --- | --- | --- |
| Reliability (16%) | 60 | 70 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 92 | 89 |
| Agent ergonomics (13%) | 60 | 64 |
| Security & auth (14%) | 76 | 58 |
| Payments & pricing (10%) | 40 | 35 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 85 | 88 |
| Transparency & trust (7%) | 79 | 76 |