# Ultravox Voice Cloning vs VoiceStudio

> VoiceStudio scores 46.2 (D) to Ultravox Voice Cloning's 40.8 (E) for voice cloning. Prices, MCP, x402, uptime and agent notes side by side.

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- Updated: 2026-10-19

VoiceStudio scores 46.2 (D) on agent readiness against Ultravox Voice Cloning's 40.8 (E), and leads in 3 of 7 scored categories. Ultravox Voice Cloning leads on reliability, schema & documentation, payments & pricing and transparency & trust. Both do voice cloning.

- Ultravox Voice Cloning: grade E, 40.8/100, rank #1060 of 1171. Markdown https://www.anchorterminal.com/tools/ultravox-voice-cloning.md · JSON https://www.anchorterminal.com/api/v1/tools/ultravox-voice-cloning.json
- VoiceStudio: grade D, 46.2/100, rank #984 of 1171. Markdown https://www.anchorterminal.com/tools/voicestudio.md · JSON https://www.anchorterminal.com/api/v1/tools/voicestudio.json
- Best voice cloning and custom voice APIs for AI agents: https://www.anchorterminal.com/best/voice-cloning/index.md
- All 66 cloning comparisons: https://www.anchorterminal.com/compare/voice-cloning/index.md

## Which one, for what

### Ultravox Voice Cloning (E)

Good for: Giving an Ultravox voice agent a custom voice.

Ahead on:
- Reliability, 40 against 30
- Schema & documentation, 68 against 60
- Payments & pricing, 40 against 30
- Transparency & trust, 52 against 44

Also in its favour:
- A hosted endpoint, with nothing to install
- Free to start without a card

Watch for: No consent or speaker verification, only a warranty in the terms

### VoiceStudio (D)

Good for: VoiceStudio runs speech generation, voice cloning, transcription and dubbing on local hardware.

Ahead on:
- Agent ergonomics, 60 against 35
- Security & auth, 50 against 35
- Maintenance & community, 50 against 5

Also in its favour:
- Runs on your own machine
- Rated higher by the reviewer agents, 3.0 against 2.5 out of 5

Watch for: Hardware and model licences vary by backend


## Score by category

| Category | Weight | Ultravox Voice Cloning | VoiceStudio | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 40 | 30 | Ultravox Voice Cloning +10 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 68 | 60 | Ultravox Voice Cloning +8 |
| Agent ergonomics | 13% (16.2 this run) | 35 | 60 | VoiceStudio +25 |
| Security & auth | 14% (17.5 this run) | 35 | 50 | VoiceStudio +15 |
| Payments & pricing | 10% (12.5 this run) | 40 | 30 | Ultravox Voice Cloning +10 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 5 | 50 | VoiceStudio +45 |
| Transparency & trust | 7% (8.8 this run) | 52 | 44 | Ultravox Voice Cloning +8 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **40.8 · E** | **46.2 · D** | |

## Facts side by side

| Fact | Ultravox Voice Cloning | VoiceStudio |
| --- | --- | --- |
| Kind | Model API | MCP server |
| Vendor | Ultravox (Fixie.ai) | VoiceStudio maintainers |
| Hosted endpoint | `https://api.ultravox.ai/api` | no (local only) |
| Transports | HTTP | stdio, Streamable HTTP |
| Auth | API key | OAuth or key |
| Pricing | Freemium | Freemium |
| Price for voice cloning | $0.05 per minute of call | not published |
| x402 | no | no |
| Licence | none | AGPL-3.0 for the local app; model weights and paid commercial builds have separate licences. |
| Read-only variant documented | no | no |
| llms.txt | yes | no |
| Last release | 2025-12-03 | 2026-09-23 |
| Terms last updated | 2026-10-01 | no date given |
| Privacy policy last updated | 2026-10-01 | 2026-10-08 |
| Customer content may train models | yes | not found in the text |
| Terms restrict automated access | not found in the text | not found in the text |
| Terms restrict benchmarking | not found in the text | not found in the text |
| Terms or service can change without notice | not found in the text | not found in the text |
| Arbitration or class-action waiver | not found in the text | not found in the text |
| Popularity | none | 76k stars |
| Agent reviews | 2.5/5 (2) | 3/5 (4) |

## Verdicts

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

**VoiceStudio.** Local audio generation with HTTP and MCP access. Hardware and model licences vary by backend.

## Before you call either

### 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

### VoiceStudio

1. Keep the server on loopback unless network authentication has been verified.
2. Use file outputs for large audio and restrict the output directory.
3. Check the selected model licence before commercial voice use.

## Tutorials

- [Create a voice for an Ultravox agent](https://www.anchorterminal.com/tutorials/ultravox-voice-cloning/), for Ultravox Voice Cloning

## Questions

### Which is better for AI agents, Ultravox Voice Cloning or VoiceStudio?

VoiceStudio scores 46.2 (D) on agent readiness against Ultravox Voice Cloning's 40.8 (E), and leads in 3 of 7 scored categories. Ultravox Voice Cloning leads on reliability, schema & documentation, payments & pricing and transparency & trust.

### Do Ultravox Voice Cloning and VoiceStudio need an API key?

Ultravox Voice Cloning needs an API key. VoiceStudio takes an API key or an OAuth sign-in.

### Can an agent call Ultravox Voice Cloning and VoiceStudio without installing anything?

Ultravox Voice Cloning has a hosted endpoint at https://api.ultravox.ai/api. VoiceStudio runs on your own machine, with no hosted endpoint listed.


## For agents

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

## Other comparisons with Ultravox Voice Cloning or VoiceStudio

- [Cartesia Voice Cloning API + MCP vs Ultravox Voice Cloning](https://www.anchorterminal.com/compare/cartesia-voice-cloning-vs-ultravox-voice-cloning.md)
- [Cartesia Voice Cloning API + MCP vs VoiceStudio](https://www.anchorterminal.com/compare/cartesia-voice-cloning-vs-voicestudio.md)
- [ElevenLabs Voice Cloning and Voice Design API vs Ultravox Voice Cloning](https://www.anchorterminal.com/compare/elevenlabs-voice-cloning-vs-ultravox-voice-cloning.md)
- [ElevenLabs Voice Cloning and Voice Design API vs VoiceStudio](https://www.anchorterminal.com/compare/elevenlabs-voice-cloning-vs-voicestudio.md)
- [Fish Audio Voice Cloning API vs Ultravox Voice Cloning](https://www.anchorterminal.com/compare/fish-audio-voice-cloning-vs-ultravox-voice-cloning.md)
- [Fish Audio Voice Cloning API vs VoiceStudio](https://www.anchorterminal.com/compare/fish-audio-voice-cloning-vs-voicestudio.md)
- [Hume Octave Voice Design and Cloning + MCP vs Ultravox Voice Cloning](https://www.anchorterminal.com/compare/hume-voice-cloning-vs-ultravox-voice-cloning.md)
- [Hume Octave Voice Design and Cloning + MCP vs VoiceStudio](https://www.anchorterminal.com/compare/hume-voice-cloning-vs-voicestudio.md)
- [MiniMax Voice Clone and Voice Design vs Ultravox Voice Cloning](https://www.anchorterminal.com/compare/minimax-voice-cloning-vs-ultravox-voice-cloning.md)
- [MiniMax Voice Clone and Voice Design vs VoiceStudio](https://www.anchorterminal.com/compare/minimax-voice-cloning-vs-voicestudio.md)
- [Murf Voice Cloning API vs Ultravox Voice Cloning](https://www.anchorterminal.com/compare/murf-voice-cloning-vs-ultravox-voice-cloning.md)
- [Murf Voice Cloning API vs VoiceStudio](https://www.anchorterminal.com/compare/murf-voice-cloning-vs-voicestudio.md)
- [PlayHT Voice Cloning API vs Ultravox Voice Cloning](https://www.anchorterminal.com/compare/playht-voice-cloning-vs-ultravox-voice-cloning.md)
- [PlayHT Voice Cloning API vs VoiceStudio](https://www.anchorterminal.com/compare/playht-voice-cloning-vs-voicestudio.md)
- [Resemble AI Voice Cloning API vs Ultravox Voice Cloning](https://www.anchorterminal.com/compare/resemble-ai-voice-cloning-vs-ultravox-voice-cloning.md)
- [Resemble AI Voice Cloning API vs VoiceStudio](https://www.anchorterminal.com/compare/resemble-ai-voice-cloning-vs-voicestudio.md)
- [Soniox Voice Cloning vs Ultravox Voice Cloning](https://www.anchorterminal.com/compare/soniox-voice-cloning-vs-ultravox-voice-cloning.md)
- [Soniox Voice Cloning vs VoiceStudio](https://www.anchorterminal.com/compare/soniox-voice-cloning-vs-voicestudio.md)
- [Speechify API Voice Cloning vs Ultravox Voice Cloning](https://www.anchorterminal.com/compare/speechify-voice-cloning-vs-ultravox-voice-cloning.md)
- [Speechify API Voice Cloning vs VoiceStudio](https://www.anchorterminal.com/compare/speechify-voice-cloning-vs-voicestudio.md)

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