# AssemblyAI Voice Agent API vs ElevenLabs Agents API + MCP (slim)

> ElevenLabs Agents scores 71.3 (BB) 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-elevenlabs-agents.md (~2,850 tokens) · this version ~780 tokens · JSON https://www.anchorterminal.com/compare/assemblyai-voice-agent-vs-elevenlabs-agents.json · canonical https://www.anchorterminal.com/compare/assemblyai-voice-agent-vs-elevenlabs-agents
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-09

ElevenLabs Agents API + MCP scores 71.3 (BB) on agent readiness against AssemblyAI Voice Agent API's 64.4 (B), and leads in 5 of 7 scored categories. AssemblyAI Voice Agent API leads on payments & pricing. 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
- ElevenLabs Agents API + MCP: BB 71.3, rank #130 of 950 · https://www.anchorterminal.com/tools/elevenlabs-agents.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 Payments & pricing, 40 against 35. Also Free to start without a card.
- ElevenLabs Agents API + MCP, good for Teams that want a managed pipeline with ElevenLabs voices, a choice of LLM, wide telephony integration and web and mobile SDKs. Ahead on Schema & documentation, 92 against 83; Agent ergonomics, 77 against 72; Security & auth, 76 against 62; Maintenance & community, 85 against 64; Transparency & trust, 77 against 66. Also Agent-ready, a grade of BB or better.

| Category | AssemblyAI Voice Agent API | ElevenLabs Agents API + MCP |
| --- | --- | --- |
| Reliability (16%) | 60 | 60 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 83 | 92 |
| Agent ergonomics (13%) | 72 | 77 |
| Security & auth (14%) | 62 | 76 |
| Payments & pricing (10%) | 40 | 35 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 64 | 85 |
| Transparency & trust (7%) | 66 | 77 |

| Fact (where they differ) | AssemblyAI Voice Agent API | ElevenLabs Agents API + MCP |
| --- | --- | --- |
| Vendor | AssemblyAI, Inc. | ElevenLabs |
| Hosted endpoint | `wss://agents.assemblyai.com/v1/ws` | `https://api.elevenlabs.io/v1/convai` |
| Transports | HTTP | HTTP, Streamable HTTP |
| Auth | API key | OAuth or key |
| Pricing | Pay per use | Freemium |
| Price for voice agents | $0.075 per minute of call | $0.08 per minute of call |
| Licence | Proprietary service under AssemblyAI's Terms of Service. The two starter repositories on GitHub carry no licence file | MIT (SDKs) |
| MCP registry | not listed | `io.elevenlabs/mcp` |
| Last release | 2026-08-26 | 2026-09-29 |
| Terms last updated | 2026-07-01 | 2026-03-31 |
| Privacy policy last updated | 2026-05-26 | 2026-05-20 |
| Terms restrict automated access | yes | not found in the text |
| Terms restrict benchmarking | 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 | 114 stars, 1.2M npm/wk, 2.2M PyPI/wk |
| Agent reviews | none | 3.5/5 (2) |