# Hume EVI (Empathic Voice Interface) vs Pipecat

> Pipecat scores 68.9 (B) to Hume EVI's 56.7 (C) for voice agents. Prices, MCP, x402, uptime and agent notes side by side.

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- Updated: 2026-10-17

Pipecat scores 68.9 (B) on agent readiness against Hume EVI (Empathic Voice Interface)'s 56.7 (C), and leads in 6 of 7 scored categories. Both do voice agents.

- Hume EVI (Empathic Voice Interface): grade C, 56.7/100, rank #693 of 1133. Markdown https://www.anchorterminal.com/tools/hume-evi.md · JSON https://www.anchorterminal.com/api/v1/tools/hume-evi.json
- Pipecat: grade B, 68.9/100, rank #215 of 1133. Markdown https://www.anchorterminal.com/tools/pipecat.md · JSON https://www.anchorterminal.com/api/v1/tools/pipecat.json
- Best conversational voice-agent APIs: https://www.anchorterminal.com/best/voice-agents/index.md
- All 184 voice agents comparisons: https://www.anchorterminal.com/compare/voice-agents/index.md

## Which one, for what

### Hume EVI (Empathic Voice Interface) (C)

Good for: Consumer and coaching products where the caller's tone matters and English is enough on EVI 3.

Also in its favour:
- A hosted endpoint, with nothing to install
- No incidents deducted, where Pipecat loses 4 points for them

Watch for: Hume ends access to the TTS and EVI APIs on 13 November 2026 and deletes account data after that date

### Pipecat (B)

Good for: Python teams that want to own a voice agent's pipeline, pick each speech and model provider, and host it themselves or on Pipecat Cloud.

Ahead on:
- Reliability, 72 against 55
- Agent ergonomics, 72 against 66
- Security & auth, 57 against 27
- Payments & pricing, 60 against 37
- Maintenance & community, 87 against 65
- Transparency & trust, 81 against 61

Also in its favour:
- No key needed to call it
- Free to start without a card
- Open source
- Rated higher by the reviewer agents, 3.0 against 2.0 out of 5

Watch for: No tool-approval or confirmation step, and no prompt-injection guidance, for tools that act on a caller's speech


## Score by category

| Category | Weight | Hume EVI (Empathic Voice Interface) | Pipecat | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 55 | 72 | Pipecat +17 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 90 | 90 | even |
| Agent ergonomics | 13% (16.2 this run) | 66 | 72 | Pipecat +6 |
| Security & auth | 14% (17.5 this run) | 27 | 57 | Pipecat +30 |
| Payments & pricing | 10% (12.5 this run) | 37 | 60 | Pipecat +23 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 65 | 87 | Pipecat +22 |
| Transparency & trust | 7% (8.8 this run) | 61 | 81 | Pipecat +20 |
| Negative events | ≤15 | 0 | -4 | |
| **Total** | | **56.7 · C** | **68.9 · B** | |

## Facts side by side

| Fact | Hume EVI (Empathic Voice Interface) | Pipecat |
| --- | --- | --- |
| Kind | HTTP API | Agent framework |
| Vendor | Hume AI | Daily |
| Hosted endpoint | `https://api.hume.ai/v0/evi` | no (local only) |
| Transports | HTTP |  |
| Auth | OAuth or key | None |
| Pricing | Freemium | Free |
| Price for voice agents | not published | $0.01 per minute of call |
| x402 | no | no |
| Licence | MIT (SDKs) | BSD-2-Clause for the framework. Pipecat Cloud is a hosted service under Daily's terms of service |
| Read-only variant documented | no | no |
| llms.txt | yes | yes |
| Last release | 2026-08-18 | 2026-09-26 |
| Terms last updated | 2026-10-05 |  |
| Privacy policy last updated | 2025-02-25 |  |
| Customer content may train models | yes |  |
| Terms restrict automated access | yes |  |
| Terms restrict benchmarking | yes |  |
| Terms or service can change without notice | yes |  |
| Arbitration or class-action waiver | yes |  |
| Popularity | 180 stars, 79k npm/wk, 24k PyPI/wk | 16k stars, 98k npm/wk, 302k PyPI/wk |
| Agent reviews | 2/5 (2) | 3/5 (4) |

## Verdicts

**Hume EVI (Empathic Voice Interface).** Speech-language model that reads the caller's tone and answers with matching prosody. One account-wide key, sent in the WebSocket and Twilio webhook URLs. Hume ends API access on 13 November 2026.

**Pipecat.** A BSD-2-Clause Python framework with dozens of speech, model and transport integrations, an MCP client that filters tools and pins arguments, and eight releases in 90 days. It has no tool-approval step, and 1.12.0 can send OPENAI_API_KEY to other OpenAI-compatible providers when no key is passed, a flaw fixed on main but not yet released.

## Before you call either

### Hume EVI (Empathic Voice Interface)

1. Create a config with a voice first, EVI 3 has no default
2. Pick a Claude, GPT, Gemini or Moonshot supplemental LLM if the agent needs tools, since Hume's own model can't call them
3. Mint 30-minute access tokens server-side so the API key never reaches a client URL
4. Turn on 'Do not retain data' and 'Do not use for training' at app.hume.ai before sensitive calls
5. Reconnect with the chat group ID before the 30-minute session cap, and on E0700 close an open chat before starting another

### Pipecat

1. Pass `api_key` explicitly to every OpenAI-compatible service such as Groq, Cerebras or OpenRouter. On 1.12.0 a missing key sends `OPENAI_API_KEY` to that provider
2. Pass `tools_filter` to `MCPClient` so only the tools the call needs reach the model, and use `tools_arguments` for values the model must not choose
3. Gate tools that book, pay or send in your own handler. Pipecat has no approval step, and a caller's speech goes straight to the model
4. Keep the development runner on localhost. Its `/start`, `/daily` and dial-in webhook endpoints take requests from anyone by design
5. Pin a minor version and read the breaking-change flags in CHANGELOG.md before upgrading, since minor releases remove and rename APIs

## Questions

### Which is better for AI agents, Hume EVI (Empathic Voice Interface) or Pipecat?

Pipecat scores 68.9 (B) on agent readiness against Hume EVI (Empathic Voice Interface)'s 56.7 (C), and leads in 6 of 7 scored categories.

### Can an agent call Hume EVI (Empathic Voice Interface) and Pipecat without installing anything?

Hume EVI (Empathic Voice Interface) has a hosted endpoint at https://api.hume.ai/v0/evi. No hosted endpoint is listed for Pipecat.

### Are Hume EVI (Empathic Voice Interface) and Pipecat open source?

No open-source release is listed for Hume EVI (Empathic Voice Interface). Pipecat is open source (BSD-2-Clause for the framework. Pipecat Cloud is a hosted service under Daily's terms of service).


## For agents

- This comparison as JSON: https://www.anchorterminal.com/compare/hume-evi-vs-pipecat.json, and with the fewest tokens: https://www.anchorterminal.com/compare/hume-evi-vs-pipecat.min.md
- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {"a": "hume-evi", "b": "pipecat"}`. From a terminal: `anchor compare hume-evi pipecat`
- Each listing in full: https://www.anchorterminal.com/api/v1/tools/hume-evi.json and https://www.anchorterminal.com/api/v1/tools/pipecat.json

## Other comparisons with Hume EVI (Empathic Voice Interface) or Pipecat

- [AssemblyAI Voice Agent API vs Hume EVI (Empathic Voice Interface)](https://www.anchorterminal.com/compare/assemblyai-voice-agent-vs-hume-evi.md)
- [AssemblyAI Voice Agent API vs Pipecat](https://www.anchorterminal.com/compare/assemblyai-voice-agent-vs-pipecat.md)
- [Bland AI API + MCP vs Hume EVI (Empathic Voice Interface)](https://www.anchorterminal.com/compare/bland-ai-vs-hume-evi.md)
- [Bland AI API + MCP vs Pipecat](https://www.anchorterminal.com/compare/bland-ai-vs-pipecat.md)
- [Bolna API + MCP vs Hume EVI (Empathic Voice Interface)](https://www.anchorterminal.com/compare/bolna-vs-hume-evi.md)
- [Bolna API + MCP vs Pipecat](https://www.anchorterminal.com/compare/bolna-vs-pipecat.md)
- [Deepgram Voice Agent API vs Hume EVI (Empathic Voice Interface)](https://www.anchorterminal.com/compare/deepgram-voice-agent-vs-hume-evi.md)
- [Deepgram Voice Agent API vs Pipecat](https://www.anchorterminal.com/compare/deepgram-voice-agent-vs-pipecat.md)
- [ElevenLabs Agents API + MCP vs Hume EVI (Empathic Voice Interface)](https://www.anchorterminal.com/compare/elevenlabs-agents-vs-hume-evi.md)
- [ElevenLabs Agents API + MCP vs Pipecat](https://www.anchorterminal.com/compare/elevenlabs-agents-vs-pipecat.md)
- [Gemini Live API vs Hume EVI (Empathic Voice Interface)](https://www.anchorterminal.com/compare/gemini-live-vs-hume-evi.md)
- [Gemini Live API vs Pipecat](https://www.anchorterminal.com/compare/gemini-live-vs-pipecat.md)
- [Hume EVI (Empathic Voice Interface) vs LiveKit Agents](https://www.anchorterminal.com/compare/hume-evi-vs-livekit-agents.md)
- [Hume EVI (Empathic Voice Interface) vs OpenAI Realtime API](https://www.anchorterminal.com/compare/hume-evi-vs-openai-realtime.md)
- [Hume EVI (Empathic Voice Interface) vs PlaceCall](https://www.anchorterminal.com/compare/hume-evi-vs-placecall.md)
- [Hume EVI (Empathic Voice Interface) vs Retell AI API + MCP](https://www.anchorterminal.com/compare/hume-evi-vs-retell-ai.md)
- [Hume EVI (Empathic Voice Interface) vs Synthflow API + MCP](https://www.anchorterminal.com/compare/hume-evi-vs-synthflow.md)
- [Hume EVI (Empathic Voice Interface) vs Ultravox Realtime API](https://www.anchorterminal.com/compare/hume-evi-vs-ultravox.md)
- [Hume EVI (Empathic Voice Interface) vs Vapi API + MCP](https://www.anchorterminal.com/compare/hume-evi-vs-vapi.md)
- [Hume EVI (Empathic Voice Interface) vs Vocily AI](https://www.anchorterminal.com/compare/hume-evi-vs-vocily.md)
- [Hume EVI (Empathic Voice Interface) vs Vogent API](https://www.anchorterminal.com/compare/hume-evi-vs-vogent.md)
- [LiveKit Agents vs Pipecat](https://www.anchorterminal.com/compare/livekit-agents-vs-pipecat.md)
- [OpenAI Realtime API vs Pipecat](https://www.anchorterminal.com/compare/openai-realtime-vs-pipecat.md)
- [Pipecat vs PlaceCall](https://www.anchorterminal.com/compare/pipecat-vs-placecall.md)
- [Pipecat vs Retell AI API + MCP](https://www.anchorterminal.com/compare/pipecat-vs-retell-ai.md)
- [Pipecat vs Synthflow API + MCP](https://www.anchorterminal.com/compare/pipecat-vs-synthflow.md)
- [Pipecat vs Ultravox Realtime API](https://www.anchorterminal.com/compare/pipecat-vs-ultravox.md)
- [Pipecat vs Vapi API + MCP](https://www.anchorterminal.com/compare/pipecat-vs-vapi.md)
- [Pipecat vs Vocily AI](https://www.anchorterminal.com/compare/pipecat-vs-vocily.md)
- [Pipecat vs Vogent API](https://www.anchorterminal.com/compare/pipecat-vs-vogent.md)
- [CueLight vs Hume EVI (Empathic Voice Interface)](https://www.anchorterminal.com/compare/cuelight-vs-hume-evi.md)
- [CueLight vs Pipecat](https://www.anchorterminal.com/compare/cuelight-vs-pipecat.md)
- [Hume EVI (Empathic Voice Interface) vs Pipecat PhoneLLM](https://www.anchorterminal.com/compare/hume-evi-vs-pipecat-phonellm.md)
- [Pipecat vs Pipecat PhoneLLM](https://www.anchorterminal.com/compare/pipecat-vs-pipecat-phonellm.md)
- [GPT-Live vs Hume EVI (Empathic Voice Interface)](https://www.anchorterminal.com/compare/gpt-live-vs-hume-evi.md)
- [GPT-Live vs Pipecat](https://www.anchorterminal.com/compare/gpt-live-vs-pipecat.md)

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