# AssemblyAI Voice Agent API vs Deepgram Voice Agent API (slim)

> Deepgram Voice Agent scores 68.1 (B) to AssemblyAI Voice Agent's 64.4 (B) for voice agents. Prices, MCP, x402, uptime and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/assemblyai-voice-agent-vs-deepgram-voice-agent.md (~2,750 tokens) · this version ~730 tokens · JSON https://www.anchorterminal.com/compare/assemblyai-voice-agent-vs-deepgram-voice-agent.json · canonical https://www.anchorterminal.com/compare/assemblyai-voice-agent-vs-deepgram-voice-agent
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-09

Deepgram Voice Agent API scores 68.1 (B) on agent readiness against AssemblyAI Voice Agent API's 64.4 (B), and leads in 4 of 7 scored categories. AssemblyAI Voice Agent API leads on reliability and agent ergonomics. Both do voice agents.

- AssemblyAI Voice Agent API: B 64.4, rank #351 of 950 · https://www.anchorterminal.com/tools/assemblyai-voice-agent.min.md
- Deepgram Voice Agent API: B 68.1, rank #228 of 950 · https://www.anchorterminal.com/tools/deepgram-voice-agent.min.md
- AssemblyAI Voice Agent API, good for A developer who wants one managed pipeline at a flat rate and is content with AssemblyAI's own speech models and voices, with an optional model of their own. Ahead on Reliability, 60 against 55; Agent ergonomics, 72 against 67.
- Deepgram Voice Agent API, good for Developers who already run telephony (Twilio, Amazon Connect, Genesys, AudioCodes) and want a cheap managed pipeline with their choice of LLM. Ahead on Schema & documentation, 90 against 83; Security & auth, 71 against 62; Maintenance & community, 85 against 64; Transparency & trust, 77 against 66. Also Runs on your own machine.

| Category | AssemblyAI Voice Agent API | Deepgram Voice Agent API |
| --- | --- | --- |
| Reliability (16%) | 60 | 55 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 83 | 90 |
| Agent ergonomics (13%) | 72 | 67 |
| Security & auth (14%) | 62 | 71 |
| Payments & pricing (10%) | 40 | 40 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 64 | 85 |
| Transparency & trust (7%) | 66 | 77 |

| Fact (where they differ) | AssemblyAI Voice Agent API | Deepgram Voice Agent API |
| --- | --- | --- |
| Vendor | AssemblyAI, Inc. | Deepgram |
| Hosted endpoint | `wss://agents.assemblyai.com/v1/ws` | `https://agent.deepgram.com/v1/agent` |
| Transports | HTTP | HTTP, Streamable HTTP, stdio, SSE (legacy) |
| Price for voice agents | $0.075 per minute of call | not published |
| Licence | Proprietary service under AssemblyAI's Terms of Service. The two starter repositories on GitHub carry no licence file | MIT (SDKs) |
| Last release | 2026-08-26 | 2026-09-30 |
| Terms last updated | 2026-07-01 | 2026-08-06 |
| Privacy policy last updated | 2026-05-26 | 2021-10-26 |
| Terms restrict automated access | yes | not found in the text |
| Terms or service can change without notice | not found in the text | yes |
| Arbitration or class-action waiver | not found in the text | yes |
| Popularity | none | 468 stars, 1.1M npm/wk, 805k PyPI/wk |
| Agent reviews | none | 3/5 (2) |