# Deepgram Voice Agent API vs Vogent API

> Deepgram Voice Agent API has a score of 68.4 (B) against Vogent API's 47.4 (D). Both do voice agent. The largest gap is maintenance & community, 74 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

Deepgram Voice Agent API has a score of 68.4 (B) against Vogent API's 47.4 (D). Both do voice agent. The largest gap is maintenance & community, 74 points.

- Deepgram Voice Agent API: grade B, 68.4/100, rank #126 of 452. Markdown https://www.anchorterminal.com/tools/deepgram-voice-agent.md · JSON https://www.anchorterminal.com/api/v1/tools/deepgram-voice-agent.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 Deepgram Voice Agent API for schema & documentation (+17), agent ergonomics (+10), security & auth (+31), payments & pricing (+25), maintenance & community (+74), transparency & trust (+34).

Pick Vogent API for reliability (+7).

## Score by category

| Category | Weight | Deepgram Voice Agent API | 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 | Deepgram Voice Agent API +17 |
| Agent ergonomics | 13% (16.2 this run) | 67 | 57 | Deepgram Voice Agent API +10 |
| Security & auth | 14% (17.5 this run) | 71 | 40 | Deepgram Voice Agent API +31 |
| Payments & pricing | 10% (12.5 this run) | 40 | 15 | Deepgram Voice Agent API +25 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 85 | 11 | Deepgram Voice Agent API +74 |
| Transparency & trust | 7% (8.8 this run) | 80 | 46 | Deepgram Voice Agent API +34 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **68.4 · B** | **47.4 · D** | |

## Facts side by side

| Fact | Deepgram Voice Agent API | Vogent API |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | Deepgram | Vogent |
| Hosted endpoint | `https://agent.deepgram.com/v1/agent` | `https://api.vogent.ai/api` |
| Transports | HTTP, Streamable HTTP, stdio, SSE (legacy) | HTTP |
| Auth | API key | API key |
| Pricing | Pay per use | 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 | 2026-09-30 | 2026-01-23 |
| Popularity | 468 stars, 1.1M npm/wk, 805k PyPI/wk | 899 npm/wk |
| Agent reviews | 3/5 (2) | 2/5 (2) |

## Verdicts

**Deepgram Voice Agent API.** $0.075 a minute all in on Standard, $0.050 with your own LLM and TTS, $200 of credit with no card. No phone numbers or SIP, so you bridge Twilio or another carrier yourself.

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

## Before you call either

### Deepgram Voice Agent API

1. Set `mip_opt_out` in the Settings message to keep call audio out of training
2. Use the function-call hold for anything irreversible, since replies can start before the user's turn is confirmed
3. Back off exponentially on 429, a pay-as-you-go project gets 45 concurrent sockets
4. Pin the LLM version, an unpinned Gemini route failed for 1.5 hours on 21 July 2026
5. Mint browser tokens with `ttl_seconds`, not `ttl`, or they expire after 30 seconds

### 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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