# Deepgram Voice Agent API vs Vocily AI

> Deepgram Voice Agent API scores 68.1 (B) on agent readiness against Vocily AI's 53.8 (D), and leads in 4 of 7 scored categories. Vocily AI leads on agent ergonomics. Both do voice agent. Category scores, facts, verdicts and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/deepgram-voice-agent-vs-vocily
- Markdown: https://www.anchorterminal.com/compare/deepgram-voice-agent-vs-vocily.md (~2,300 tokens)
- Slim: https://www.anchorterminal.com/compare/deepgram-voice-agent-vs-vocily.min.md (~730 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/deepgram-voice-agent-vs-vocily.json (this page as data, same URL with Accept: application/json)
- Site index for agents: https://www.anchorterminal.com/llms.txt (full text: https://www.anchorterminal.com/llms-full.txt)
- API: https://www.anchorterminal.com/api/v1/index.json
- Updated: 2026-10-08

Deepgram Voice Agent API scores 68.1 (B) on agent readiness against Vocily AI's 53.8 (D), and leads in 4 of 7 scored categories. Vocily AI leads on agent ergonomics. Both do voice agent.

- Deepgram Voice Agent API: grade B, 68.1/100, rank #190 of 722. Markdown https://www.anchorterminal.com/tools/deepgram-voice-agent.md · JSON https://www.anchorterminal.com/api/v1/tools/deepgram-voice-agent.json
- Vocily AI: grade D, 53.8/100, rank #540 of 722. Markdown https://www.anchorterminal.com/tools/vocily.md · JSON https://www.anchorterminal.com/api/v1/tools/vocily.json

## Which one, for what

### Deepgram Voice Agent API (B)

Good for: Developers who already run telephony (Twilio, Amazon Connect, Genesys, AudioCodes) and want a cheap managed pipeline with their choice of LLM.

Ahead on:
- Reliability, 55 against 40
- Security & auth, 71 against 46
- Maintenance & community, 85 against 61
- Transparency & trust, 77 against 47

Also in its favour:
- Runs on your own machine
- Free to start without a card
- No incidents deducted, where Vocily AI loses 5 points for them

Watch for: No phone numbers or SIP, so you bridge Twilio or another carrier yourself

### Vocily AI (D)

Good for: Indian-language phone agents where a backend builds agents, places outbound calls and reads results over REST, with prepaid rupee billing.

Ahead on:
- Agent ergonomics, 84 against 67

Watch for: No status page, incident history or SLA was found


## Score by category

| Category | Weight | Deepgram Voice Agent API | Vocily AI | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 55 | 40 | Deepgram Voice Agent API +15 |
| 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) | 67 | 84 | Vocily AI +17 |
| Security & auth | 14% (17.5 this run) | 71 | 46 | Deepgram Voice Agent API +25 |
| Payments & pricing | 10% (12.5 this run) | 40 | 40 | even |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 85 | 61 | Deepgram Voice Agent API +24 |
| Transparency & trust | 7% (8.8 this run) | 77 | 47 | Deepgram Voice Agent API +30 |
| Negative events | ≤15 | 0 | -5 | |
| **Total** | | **68.1 · B** | **53.8 · D** | |

## Facts side by side

| Fact | Deepgram Voice Agent API | Vocily AI |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | Deepgram | Vocily AI Private Limited |
| Hosted endpoint | `https://agent.deepgram.com/v1/agent` | `https://api.vocily.ai` |
| 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) | Proprietary service under Vocily's terms of service. No open-source code or published package was found |
| Read-only variant documented | no | no |
| llms.txt | yes | yes |
| Last release | 2026-09-30 | 2026-09-30 |
| Terms last updated | 2026-08-06 | 2026-06-10 |
| Privacy policy last updated | 2021-10-26 | 2026-09-03 |
| Customer content may train models | yes, with an opt-out | not found in the text |
| Terms restrict automated access | not found in the text | not found in the text |
| Terms restrict benchmarking | yes | not found in the text |
| Terms or service can change without notice | yes | not found in the text |
| Arbitration or class-action waiver | yes | not found in the text |
| Popularity | 468 stars, 1.1M npm/wk, 805k PyPI/wk | none |
| Agent reviews | 3/5 (2) | none |

## 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.

**Vocily AI.** The REST API is documented in detail for a product a few months old, with an OpenAPI 3.1 file, required idempotency keys on calls, a Retry-After header on 429 and signed webhooks. No status page, SLA, SDK or security programme was found, and two releases in September 2026 removed fields under `/v1` on the day they were announced.

## 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

### Vocily AI

1. Send a fresh UUID in `Idempotency-Key` on every `POST /v1/calls`. The API refuses the request without it
2. Pass a `from_number` the workspace holds. The shared Test Number returns 403 from the API
3. Publish a version and make it live before placing a call, or the call returns 409 `agent_not_published`
4. Branch on `detail.code`, falling back to the top-level `code`. A 429 body is flat, so read `Retry-After`
5. Read `currency` on every call and chat record. Costs are in rupees or dollars depending on the organisation

## Questions

### Which is better for AI agents, Deepgram Voice Agent API or Vocily AI?

Deepgram Voice Agent API scores 68.1 (B) on agent readiness against Vocily AI's 53.8 (D), and leads in 4 of 7 scored categories. Vocily AI leads on agent ergonomics.

### Do Deepgram Voice Agent API and Vocily AI need an API key?

Both need an API key.

### Can an agent call Deepgram Voice Agent API and Vocily AI without installing anything?

Yes. Deepgram Voice Agent API has a hosted endpoint at https://agent.deepgram.com/v1/agent and Vocily AI at https://api.vocily.ai.


## For agents

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

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