Cartesia Review·Audio Tool
Cartesia
The fastest voice model on the market — sub-90ms latency.
4.0/ 5
Ground Truth verdict
Reviewed by Kamran Arshad. See how we evaluate · Updated 2026-06-05.
RealtimeLow latencyVoice agents
- Type
- Audio Tool
- Category
- voice audio
- Starts at
- Free
- Platforms
- Web
- Launched
- May 2024
- Last reviewed
- 2026-06-05
Verdict
The voice model voice-agent startups actually use.
Cartesia's Sonic model hits the sub-100ms latency that makes voice agents feel like phone calls instead of walkie-talkies. The quality holds up at that speed, which is the part nobody else has cracked.
The product, in motion
What Cartesia actually looks like
Scroll inside the panel to see the full homepage. Live screenshot — updates as the product evolves.
cartesia.ai
Who it's for
Best for
- Voice agents
- Realtime conversation products
Not for
- Offline batch generation
The scorecard
Stack score
Composite of editorial review, hands-on testing, and reader-reported value. Each sub-score is rated 0–5 against Ground Truth's published criteria.
- Overall
- 4.0/5
- Output quality
- 4.0/5
- Utility & features
- 4.0/5
- Usability & UX
- 4.0/5
- Performance & reliability
- 4.0/5
- Cost vs. value
- 4.0/5
Pricing
Model
freemium
Free tier · Paid from
$49/mo
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