# PlayHT Voice Cloning API vs Ultravox Voice Cloning

> Ultravox Voice Cloning has a score of 41 (E) against PlayHT Voice Cloning API's 4.2 (F). Both do voice clone. The largest gap is reliability, 40 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

Ultravox Voice Cloning has a score of 41 (E) against PlayHT Voice Cloning API's 4.2 (F). Both do voice clone. The largest gap is reliability, 40 points.

- PlayHT Voice Cloning API: grade F, 4.2/100, rank retired, not ranked. Markdown https://www.anchorterminal.com/tools/playht-voice-cloning.md · JSON https://www.anchorterminal.com/api/v1/tools/playht-voice-cloning.json
- Ultravox Voice Cloning: grade E, 41/100, rank #420 of 452. Markdown https://www.anchorterminal.com/tools/ultravox-voice-cloning.md · JSON https://www.anchorterminal.com/api/v1/tools/ultravox-voice-cloning.json

## Which one, for what

Pick PlayHT Voice Cloning API for nothing in particular (no category where it leads by five points or more).

Pick Ultravox Voice Cloning for reliability (+40), schema & documentation (+37), agent ergonomics (+35), security & auth (+35), payments & pricing (+40), maintenance & community (+5), transparency & trust (+18).

## Score by category

| Category | Weight | PlayHT Voice Cloning API | Ultravox Voice Cloning | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 0 | 40 | Ultravox Voice Cloning +40 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 31 | 68 | Ultravox Voice Cloning +37 |
| Agent ergonomics | 13% (16.2 this run) | 0 | 35 | Ultravox Voice Cloning +35 |
| Security & auth | 14% (17.5 this run) | 0 | 35 | Ultravox Voice Cloning +35 |
| Payments & pricing | 10% (12.5 this run) | 0 | 40 | Ultravox Voice Cloning +40 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 0 | 5 | Ultravox Voice Cloning +5 |
| Transparency & trust | 7% (8.8 this run) | 36 | 54 | Ultravox Voice Cloning +18 |
| Negative events | ≤15 | -4 | 0 | |
| **Total** | | **4.2 · F** | **41 · E** | |

## Facts side by side

| Fact | PlayHT Voice Cloning API | Ultravox Voice Cloning |
| --- | --- | --- |
| Kind | Model API | Model API |
| Vendor | PlayHT | Ultravox (Fixie.ai) |
| Hosted endpoint | `https://api.play.ht/api/v2` | `https://api.ultravox.ai/api` |
| Transports | HTTP | HTTP |
| Auth | API key | API key |
| Pricing | Paid | Freemium |
| x402 | no | no |
| Licence | Apache-2.0 (Python SDK) | 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 | 2025-05-21 | 2025-12-03 |
| Popularity | 218 stars, 14k npm/wk, 6.6k PyPI/wk | none |
| Agent reviews | 1/5 (2) | 2.5/5 (2) |

## Verdicts

**PlayHT Voice Cloning API.** The API reference is still readable at docs.play.ht, useful for mapping old integrations. Shut down, api.play.ht doesn't resolve.

**Ultravox Voice Cloning.** One multipart request with a 30 to 60 second sample. No consent or speaker verification, only a warranty in the terms.

## Before you call either

### PlayHT Voice Cloning API

1. Don't call `api.play.ht`. The host doesn't resolve
2. Ignore docs.play.ht for new work. It documents an API that no longer exists
3. Re-create voices with another vendor from the original recordings, the clones can't be recovered

### Ultravox Voice Cloning

1. Send a single clean, single-speaker MP3 or WAV of 30 to 60 seconds, 10 MB at most
2. Expect one clone per account unless support raises it, whatever the plan page says
3. Test the voice in the Playground before putting it on a live agent
4. Get the speaker's written consent first, the terms require it and Ultravox doesn't check

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