# CueLight vs Vocily AI

> Vocily AI scores 53.8 (D) to CueLight's 48.8 (D) for voice pipeline. Prices, MCP, x402, uptime and agent notes side by side.

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- Updated: 2026-10-15

Vocily AI scores 53.8 (D) on agent readiness against CueLight's 48.8 (D), and leads in 4 of 7 scored categories. CueLight leads on payments & pricing and transparency & trust. Both do voice pipeline.

- CueLight: grade D, 48.8/100, rank #873 of 1094. Markdown https://www.anchorterminal.com/tools/cuelight.md · JSON https://www.anchorterminal.com/api/v1/tools/cuelight.json
- Vocily AI: grade D, 53.8/100, rank #751 of 1094. Markdown https://www.anchorterminal.com/tools/vocily.md · JSON https://www.anchorterminal.com/api/v1/tools/vocily.json
- Best conversational voice-agent APIs: https://www.anchorterminal.com/best/voice-agents/index.md
- All 102 voice agents comparisons: https://www.anchorterminal.com/compare/voice-agents/index.md

## Which one, for what

### CueLight (D)

Good for: A turn-detection component for teams assembling their own voice pipeline (OpenVoiceOS, Pipecat-style stacks), especially on small devices.

Ahead on:
- Payments & pricing, 60 against 40
- Transparency & trust, 54 against 47

Also in its favour:
- No key needed to call it
- Free to start without a card
- Open source
- No incidents deducted, where Vocily AI loses 5 points for them

Watch for: English only, and the author does not plan other languages soon

### 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:
- Reliability, 40 against 29
- Schema & documentation, 90 against 50
- Agent ergonomics, 84 against 61
- Maintenance & community, 61 against 46

Also in its favour:
- A hosted endpoint, with nothing to install

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


## Score by category

| Category | Weight | CueLight | Vocily AI | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 29 | 40 | Vocily AI +11 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 50 | 90 | Vocily AI +40 |
| Agent ergonomics | 13% (16.2 this run) | 61 | 84 | Vocily AI +23 |
| Security & auth | 14% (17.5 this run) | 50 | 46 | CueLight +4 |
| Payments & pricing | 10% (12.5 this run) | 60 | 40 | CueLight +20 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 46 | 61 | Vocily AI +15 |
| Transparency & trust | 7% (8.8 this run) | 54 | 47 | CueLight +7 |
| Negative events | ≤15 | 0 | -5 | |
| **Total** | | **48.8 · D** | **53.8 · D** | |

## Facts side by side

| Fact | CueLight | Vocily AI |
| --- | --- | --- |
| Kind | SDK + MCP | HTTP API |
| Vendor | sshah03 (individual developer, name not stated) | Vocily AI Private Limited |
| Hosted endpoint | no (local only) | `https://api.vocily.ai` |
| Transports |  | HTTP |
| Auth | None | API key |
| Pricing | Free | Pay per use |
| x402 | no | no |
| Licence | Apache-2.0 | 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 | no | yes |
| Last release | 2026-10-14 | 2026-09-30 |
| Terms last updated | no document linked | 2026-06-10 |
| Privacy policy last updated | no document linked | 2026-09-03 |
| Customer content may train models |  | not found in the text |
| Terms restrict automated access |  | not found in the text |
| Terms restrict benchmarking |  | not found in the text |
| Terms or service can change without notice |  | not found in the text |
| Arbitration or class-action waiver |  | not found in the text |
| Popularity | 10 stars | none |

## Verdicts

**CueLight.** CueLight gives a voice pipeline a local end-of-turn probability every 20 ms from audio alone, with a 1.9 MB model and Apache-2.0 weights. It is one day old, English only, installs from Git rather than PyPI, has no CI or changelog, and its accuracy figures are the author's own.

**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

### CueLight

1. Feed 320 float32 samples at 16 kHz mono per `push`. Resample first, or the call raises an AssertionError
2. Spell the preset as `snappy` or `careful`. Any other name silently uses default thresholds
3. Call `clear()` before a new call or session. Pass `reset_on_turn_start=False` if your pipeline already resets per turn
4. Pin weights by downloading them to a local folder and passing that path to `from_pretrained`
5. Don't use it to identify speakers or clone voices. The training data's conditions forbid it

### 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, CueLight or Vocily AI?

Vocily AI scores 53.8 (D) on agent readiness against CueLight's 48.8 (D), and leads in 4 of 7 scored categories. CueLight leads on payments & pricing and transparency & trust.

### Can an agent call CueLight and Vocily AI without installing anything?

No hosted endpoint is listed for CueLight. Vocily AI has a hosted endpoint at https://api.vocily.ai.

### Are CueLight and Vocily AI open source?

CueLight is open source (Apache-2.0). No open-source release is listed for Vocily AI.


## For agents

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

## Other comparisons with CueLight or Vocily AI

- [AssemblyAI Voice Agent API vs Vocily AI](https://www.anchorterminal.com/compare/assemblyai-voice-agent-vs-vocily.md)
- [Bland AI API + MCP vs Vocily AI](https://www.anchorterminal.com/compare/bland-ai-vs-vocily.md)
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