Cartesia Sonic
Sonic is the fastest human-like voice API.
Unreal Speech
Better and 8x Cheaper Text-to-Speech than AWS
Updated February 2026
| Cartesia Sonic | Unreal Speech | |
|---|---|---|
| Rating | 5.0★ | 4.7★ |
| Reviews | 15 | 3 |
| Pros | 4 | 0 |
| FactScore™ | 60.2 | 28.1 |
FactScore™ Comparison
FactScore™ weighs both quality (rating) and popularity (reviews) for a fairer ranking than stars alone.
Pros & Cons
Only in Cartesia Sonic — Pros
Fast performance Real-time voice experiences Ease of use Diverse voice libraryBoth tools — Pros
—Only in Unreal Speech — Pros
No unique pros listedOnly in Cartesia Sonic — Cons
—Both tools — Cons
—Only in Unreal Speech — Cons
—Details
| Cartesia Sonic | Unreal Speech | |
|---|---|---|
| Categories | Podcasting Tools, AI Voice Agents, Text-to-Speech Software | AI Voice Agents, Text-to-Speech Software |
| Platforms | Web | Web |
| Became Popular | May 29, 2024 | June 7, 2022 |
| Website | cartesia.ai | unrealspeech.com |
Who Should Pick Which?
Choose Cartesia Sonic if...
- Fast performance
- Real-time voice experiences
- Ease of use
Choose Unreal Speech if...
- No unique pros listed
With a FactScore™ of 60.2 vs 28.1, Cartesia Sonic leads in community reception. Cartesia Sonic uniquely offers Fast performance and Real-time voice experiences, while Unreal Speech stands out for No unique pros listed.
What Users Say
Cartesia Sonic
Cartesia is amazing! They have enabled us to reduce system latency by hundreds of milliseconds – critical to making our conversations feel natural. Their streaming in, streaming out interface, pyth...
Cartesia is a game-changer for us. They provide high-quality voice APIs which are extremely fast and budget-friendly.
Fast, high-quality voice models in multiple languages. Great team and great product velocity.
Unreal Speech
Interesting approach, easy API to setup and a generous free tier plan!
Unreal speech is really great one of the things I love about unreal speech is how you can easily integrate tts to your workflow and most importantly the cost / pricing is really satisfying
Beats others in terms of pricing. Outsmarts free options with a lovely selection of pleasantly realistic voices.
Related Comparisons
Frequently Asked Questions
Which is better, Cartesia Sonic or Unreal Speech?
Based on FactScore™, Cartesia Sonic leads with a score of 60.2 vs 28.1. Cartesia Sonic has a higher rating of 5.0★ compared to 4.7★.
What are the pros of Cartesia Sonic compared to Unreal Speech?
Cartesia Sonic uniquely offers: Fast performance, Real-time voice experiences, Ease of use, Diverse voice library.
What are the pros of Unreal Speech compared to Cartesia Sonic?
Unreal Speech uniquely offers: No unique pros listed.
Is Cartesia Sonic better rated than Unreal Speech?
Cartesia Sonic is rated 5.0★ from 15 reviews. Unreal Speech is rated 4.7★ from 3 reviews.
What is the FactScore™ of Cartesia Sonic and Unreal Speech?
FactScore™ weighs rating and review volume together. Cartesia Sonic scores 60.2 and Unreal Speech scores 28.1.
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