Cartesia Sonic
Sonic is the fastest human-like voice API.
Play
Making AI speak better than humans.
Updated February 2026
| Cartesia Sonic | Play | |
|---|---|---|
| Rating | 5.0★ | 3.3★ |
| Reviews | 15 | 4 |
| Pros | 4 | 4 |
| FactScore™ | 60.2 | 22.7 |
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 Play — Pros
Realistic voice quality Easy implementation Voice response capability Voice speedOnly in Cartesia Sonic — Cons
—Both tools — Cons
—Only in Play — Cons
Unreliable voice output Licensing issues Poor customer service Poor documentation Slow performanceDetails
| Cartesia Sonic | Play | |
|---|---|---|
| Categories | Podcasting Tools, AI Voice Agents, Text-to-Speech Software | AI Voice Agents |
| Platforms | Web | Web |
| Became Popular | May 29, 2024 | September 30, 2016 |
| Website | cartesia.ai | play.ai |
Who Should Pick Which?
Choose Cartesia Sonic if...
- Fast performance
- Real-time voice experiences
- Ease of use
Choose Play if...
- Realistic voice quality
- Easy implementation
- Voice response capability
With a FactScore™ of 60.2 vs 22.7, Cartesia Sonic leads in community reception. Cartesia Sonic uniquely offers Fast performance and Real-time voice experiences, while Play stands out for Realistic voice quality and Easy implementation.
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.
Play
Past the initial wow effect on the demo, it was a pretty bad experience for me. My use case was super basic with TTS API. A lot of settings are poorly explained, the JS library was unusable. And in...
We use Play to make realistic voices for our voice agents. It makes the testing process more authentic.
Play has superior voice quality for the narration of stories, making it perfect for our app's use-case
Related Comparisons
Frequently Asked Questions
Which is better, Cartesia Sonic or Play?
Based on FactScore™, Cartesia Sonic leads with a score of 60.2 vs 22.7. Cartesia Sonic has a higher rating of 5.0★ compared to 3.3★.
What are the pros of Cartesia Sonic compared to Play?
Cartesia Sonic uniquely offers: Fast performance, Real-time voice experiences, Ease of use, Diverse voice library.
What are the pros of Play compared to Cartesia Sonic?
Play uniquely offers: Realistic voice quality, Easy implementation, Voice response capability, Voice speed.
Is Cartesia Sonic better rated than Play?
Cartesia Sonic is rated 5.0★ from 15 reviews. Play is rated 3.3★ from 4 reviews.
What is the FactScore™ of Cartesia Sonic and Play?
FactScore™ weighs rating and review volume together. Cartesia Sonic scores 60.2 and Play scores 22.7.
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