# Deepgram Voice Agent API vs Retell AI API + MCP (slim)

> Retell AI API + MCP has a score of 69.4 (B) against Deepgram Voice Agent API's 68.4 (B). Both do voice agent. The largest gap is agent ergonomics, 7 points. Category scores, facts, verdicts and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/deepgram-voice-agent-vs-retell-ai.md (~1,650 tokens) · this version ~330 tokens · JSON https://www.anchorterminal.com/compare/deepgram-voice-agent-vs-retell-ai.json · canonical https://www.anchorterminal.com/compare/deepgram-voice-agent-vs-retell-ai
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-04

Retell AI API + MCP has a score of 69.4 (B) against Deepgram Voice Agent API's 68.4 (B). Both do voice agent. The largest gap is agent ergonomics, 7 points.

- Deepgram Voice Agent API: B 68.4, rank #126 of 452 · https://www.anchorterminal.com/tools/deepgram-voice-agent.min.md
- Retell AI API + MCP: B 69.4, rank #114 of 452 · https://www.anchorterminal.com/tools/retell-ai.min.md
- Pick Deepgram Voice Agent API for agent ergonomics (+7). Pick Retell AI API + MCP for reliability (+5), security & auth (+5).

| Category | Deepgram Voice Agent API | Retell AI API + MCP |
| --- | --- | --- |
| Reliability (16%) | 55 | 60 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 90 | 92 |
| Agent ergonomics (13%) | 67 | 60 |
| Security & auth (14%) | 71 | 76 |
| Payments & pricing (10%) | 40 | 40 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 85 | 85 |
| Transparency & trust (7%) | 80 | 79 |