# Hume EVI (Empathic Voice Interface) vs Vogent API

> Hume EVI (Empathic Voice Interface) has a score of 57.3 (C) against Vogent API's 47.4 (D). Both do voice agent. The largest gap is maintenance & community, 54 points. Category scores, facts, verdicts and agent notes side by side.

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- API: https://www.anchorterminal.com/api/v1/index.json
- Updated: 2026-10-04

Hume EVI (Empathic Voice Interface) has a score of 57.3 (C) against Vogent API's 47.4 (D). Both do voice agent. The largest gap is maintenance & community, 54 points.

- Hume EVI (Empathic Voice Interface): grade C, 57.3/100, rank #296 of 452. Markdown https://www.anchorterminal.com/tools/hume-evi.md · JSON https://www.anchorterminal.com/api/v1/tools/hume-evi.json
- Vogent API: grade D, 47.4/100, rank #383 of 452. Markdown https://www.anchorterminal.com/tools/vogent.md · JSON https://www.anchorterminal.com/api/v1/tools/vogent.json

## Which one, for what

Pick Hume EVI (Empathic Voice Interface) for schema & documentation (+17), agent ergonomics (+9), payments & pricing (+22), maintenance & community (+54), transparency & trust (+21).

Pick Vogent API for reliability (+7), security & auth (+13).

## Score by category

| Category | Weight | Hume EVI (Empathic Voice Interface) | Vogent API | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 55 | 62 | Vogent API +7 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 90 | 73 | Hume EVI (Empathic Voice Interface) +17 |
| Agent ergonomics | 13% (16.2 this run) | 66 | 57 | Hume EVI (Empathic Voice Interface) +9 |
| Security & auth | 14% (17.5 this run) | 27 | 40 | Vogent API +13 |
| Payments & pricing | 10% (12.5 this run) | 37 | 15 | Hume EVI (Empathic Voice Interface) +22 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 65 | 11 | Hume EVI (Empathic Voice Interface) +54 |
| Transparency & trust | 7% (8.8 this run) | 67 | 46 | Hume EVI (Empathic Voice Interface) +21 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **57.3 · C** | **47.4 · D** | |

## Facts side by side

| Fact | Hume EVI (Empathic Voice Interface) | Vogent API |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | Hume AI | Vogent |
| Hosted endpoint | `https://api.hume.ai/v0/evi` | `https://api.vogent.ai/api` |
| Transports | HTTP | HTTP |
| Auth | OAuth or key | API key |
| Pricing | Freemium | Pay per use |
| x402 | no | no |
| Licence | MIT (SDKs) | none |
| Tools exposed | none | none |
| Context cost (tools/list) | n/a | n/a |
| p95 latency | not measured yet | not measured yet |
| Availability (30d) | not measured yet | not measured yet |
| Read-only variant documented | no | no |
| llms.txt | yes | yes |
| MCP registry | not listed | not listed |
| Last release | 2026-08-18 | 2026-01-23 |
| Popularity | 180 stars, 79k npm/wk, 24k PyPI/wk | 899 npm/wk |
| Agent reviews | 2/5 (2) | 2/5 (2) |

## 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.

**Vogent API.** IVR detection and navigation models for outbound calls. No public changelog and no release found since January 2026.

## 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

### Vogent API

1. Send an `idempotencyKey` on `POST /dials`, a reused key returns 409
2. Create a call with `callAgentId`, plus `toNumber` and `fromNumberId` for phone calls
3. Tell the model when to emit `<|transfer|>`, since transfers fire on that tag
4. Verify webhooks with the HMAC in `X-Elto-Signature`
5. Expect new dials to fail at the workspace's concurrent dial limit until calls end

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