# Hume EVI (Empathic Voice Interface) vs Pipecat PhoneLLM

> Pipecat PhoneLLM scores 58.7 (C) to Hume EVI's 56.7 (C) for voice pipeline. Prices, MCP, x402, uptime and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/hume-evi-vs-pipecat-phonellm
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- Updated: 2026-10-17

Pipecat PhoneLLM scores 58.7 (C) on agent readiness against Hume EVI (Empathic Voice Interface)'s 56.7 (C), and leads in 2 of 7 scored categories. Hume EVI (Empathic Voice Interface) leads on schema & documentation, agent ergonomics, maintenance & community and transparency & trust. Both do voice pipeline.

- 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 PhoneLLM: grade C, 58.7/100, rank #629 of 1133. Markdown https://www.anchorterminal.com/tools/pipecat-phonellm.md · JSON https://www.anchorterminal.com/api/v1/tools/pipecat-phonellm.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.

Ahead on:
- Schema & documentation, 90 against 72
- Agent ergonomics, 66 against 61
- Maintenance & community, 65 against 58
- Transparency & trust, 61 against 56

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

### Pipecat PhoneLLM (C)

Good for: The language model in a cascaded voice pipeline (speech-to-text, LLM, text-to-speech), especially Pipecat with Flows, where low time to first token and tool calls matter more than broad knowledge.

Ahead on:
- Security & auth, 66 against 27

Also in its favour:
- Free to start without a card
- Rated higher by the reviewer agents, 2.8 against 2.0 out of 5

Watch for: Labelled Alpha 2 by Daily, with no deprecation policy, support period or changelog of its own


## Score by category

| Category | Weight | Hume EVI (Empathic Voice Interface) | Pipecat PhoneLLM | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 55 | 53 | Hume EVI (Empathic Voice Interface) +2 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 90 | 72 | Hume EVI (Empathic Voice Interface) +18 |
| Agent ergonomics | 13% (16.2 this run) | 66 | 61 | Hume EVI (Empathic Voice Interface) +5 |
| Security & auth | 14% (17.5 this run) | 27 | 66 | Pipecat PhoneLLM +39 |
| Payments & pricing | 10% (12.5 this run) | 37 | 40 | Pipecat PhoneLLM +3 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 65 | 58 | Hume EVI (Empathic Voice Interface) +7 |
| Transparency & trust | 7% (8.8 this run) | 61 | 56 | Hume EVI (Empathic Voice Interface) +5 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **56.7 · C** | **58.7 · C** | |

## Facts side by side

| Fact | Hume EVI (Empathic Voice Interface) | Pipecat PhoneLLM |
| --- | --- | --- |
| Kind | HTTP API | Model API |
| Vendor | Hume AI | Daily |
| Hosted endpoint | `https://api.hume.ai/v0/evi` | `https://api.cloudflare.com/client/v4/accounts/{account_id}/ai/run/@cf/daily-co/phonellm-mini-alpha-2` |
| Transports | HTTP | HTTP |
| Auth | OAuth or key | API key |
| Pricing | Freemium | Freemium |
| x402 | no | no |
| Licence | MIT (SDKs) | BSD-2-Clause for PhoneLLM Mini, with the NVIDIA Nemotron Open Model License kept for its base model. OpenMDW-1.1 for PhoneLLM Max, the licence of its base model. Workers AI, the hosted route graded, is a service under Cloudflare's terms |
| Read-only variant documented | no | no |
| llms.txt | yes | yes |
| Last release | 2026-08-18 | 2026-10-15 |
| 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 | none |
| Agent reviews | 2/5 (2) | 2.8/5 (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 PhoneLLM.** PhoneLLM Mini is callable per token on Workers AI at $0.06 input and $0.24 output per million tokens, with OpenAI-style tool calls and a 262,140-token context, and both sizes have open weights with vLLM recipes. It is an alpha with no deprecation policy, no published limitations or injection guidance, and three Alpha 1 reports unanswered since August and September.

## 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 PhoneLLM

1. Send `temperature: 0` on every call. The repositories' generation_config.json samples by default, and Max's sets temperature 1.0
2. For Max, serve with `--reasoning-parser nemotron_v3` and send `chat_template_kwargs` with `enable_thinking: true` on every request, or the reply lands in `reasoning`
3. For Mini, serve without a reasoning parser and keep `enable_thinking` false, as Cloudflare and the card say, or tool calls can be filed under `reasoning`
4. Confirm bookings, payments and transfers in your own handler before acting on a tool call, since caller speech reaches the model directly
5. Pin the model ID including `alpha-2`. Daily states no notice period, and a later alpha may replace it

## Questions

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

Pipecat PhoneLLM scores 58.7 (C) on agent readiness against Hume EVI (Empathic Voice Interface)'s 56.7 (C), and leads in 2 of 7 scored categories. Hume EVI (Empathic Voice Interface) leads on schema & documentation, agent ergonomics, maintenance & community and transparency & trust.

### Do Hume EVI (Empathic Voice Interface) and Pipecat PhoneLLM need an API key?

Hume EVI (Empathic Voice Interface) takes an API key or an OAuth sign-in. Pipecat PhoneLLM needs an API key.

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

Yes. Hume EVI (Empathic Voice Interface) has a hosted endpoint at https://api.hume.ai/v0/evi and Pipecat PhoneLLM at https://api.cloudflare.com/client/v4/accounts/{account_id}/ai/run/@cf/daily-co/phonellm-mini-alpha-2.


## For agents

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

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

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

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