# Cartesia vs Udio

> Cartesia: Real-time speech AI for developers: fast text-to-speech, transcription and voice agents
> Udio: Generate songs with vocals from text prompts and lyrics, with in-browser editing

- Cartesia profile: https://finderatlas.com/tools/cartesia
- Udio profile: https://finderatlas.com/tools/udio
- Comparison page: https://finderatlas.com/compare/cartesia-vs-udio
- Last reviewed: October 2026

## Verdict

Cartesia and Udio are both Audio & Speech AI tools. Cartesia scores higher in FinderAtlas's editorial review (8.3 vs 6.9 out of 10), led by value for money. Both have a free plan or trial. Only Cartesia offers an API. Only Udio is available on iOS.

### Choose Cartesia if

- You want a tool built for Low-latency voice agents, real-time text-to-speech and streaming transcription inside applications.
- Published time to first audio of about 90 ms for Sonic 3.6, suited to live conversation.
- Free tier with 20K credits per month and a $5 Pro plan with commercial use and instant cloning.

### Choose Udio if

- You want a tool built for generating song drafts with vocals.
- Generates songs with vocals from a prompt and lyrics.
- Extend, remix and inpainting tools for editing tracks.

## Pricing

| | Cartesia | Udio |
| --- | --- | --- |
| Pricing model | Freemium | Freemium |
| Free plan or trial | Yes | Yes |
| Starting price | $0 | $0 |

## Features

| Feature | Cartesia | Udio |
| --- | --- | --- |
| Sonic Text-to-Speech | Yes | Not listed |
| Ink Speech-to-Text | Yes | Not listed |
| Managed Agents | Yes | Not listed |
| Voice Cloning | Yes | Not listed |
| Pronunciation Dictionaries | Yes | Not listed |
| Regional API Routing | Yes | Not listed |
| Telephony Support | Yes | Not listed |
| Python and JavaScript SDKs | Yes | Not listed |
| Usage and Access Controls | Yes | Not listed |
| Text-to-song generation | Not listed | Yes |
| Extend and Remix | Not listed | Yes |
| Audio inpainting | Not listed | Yes |
| Audio-guided generation | Not listed | Yes |
| Voices | Not listed | Yes |
| Sessions | Not listed | Yes |
| Library and sharing | Not listed | Yes |
| iOS app | Not listed | Yes |

## Platforms

| Platform | Cartesia | Udio |
| --- | --- | --- |
| Web | Yes | Yes |
| Windows | No | No |
| macOS | No | No |
| iOS | No | Yes |
| Android | No | No |
| API | Yes | No |
| Browser Extension | No | No |

## Cartesia strengths

- Published time to first audio of about 90 ms for Sonic 3.6, suited to live conversation.
- Free tier with 20K credits per month and a $5 Pro plan with commercial use and instant cloning.
- One platform covers text-to-speech, speech-to-text and managed voice agents.
- Regional endpoints in the US, EU and APAC, with on-premise and on-device options.
- Frequent releases: the changelog shows monthly model, voice and API updates in 2026.
- Ranked first on Artificial Analysis speech leaderboards according to the company.

## Cartesia limitations

- The free tier has no instant voice cloning, only 2 concurrent TTS requests and no commercial license.
- Credit-based billing with overage up to $65 per 1M credits can be hard to forecast as usage grows.
- Independent reviews note a smaller preset voice library than some narrative-focused competitors.
- Developer-oriented; there is no consumer app and no released iOS or Android app.

## Udio strengths

- Generates songs with vocals from a prompt and lyrics
- Extend, remix and inpainting tools for editing tracks
- Free plan with daily and monthly credits
- Official iOS app alongside the web app
- Paid credit limits were doubled or raised after the UMG deal

## Udio limitations

- Downloads of audio, video and stems are disabled on all plans
- Free plan is capped at three 2-minute songs per day
- No public API and no Android app
- Licensed platform and new models are announced but have no published launch date

## FAQ

**Is Cartesia better than Udio?**

It depends on your workflow. Cartesia is built for Low-latency voice agents, real-time text-to-speech and streaming transcription inside applications. Udio is built for generating song drafts with vocals.

**What are the key feature differences between Cartesia and Udio?**

Cartesia: Real-time speech AI for developers: fast text-to-speech, transcription and voice agents. Udio: Generate songs with vocals from text prompts and lyrics, with in-browser editing.

**Does Cartesia or Udio have a free plan?**

Yes, both do. Cartesia is freemium and Udio is freemium, and each has a free plan or trial.

**Which is cheaper, Cartesia or Udio?**

Both can be used for free. Paid plans differ in limits and features, so compare the tiers in the pricing table above.