Cartesia
A real-time text-to-speech API with expressive voices in 44 languages, built for AI agents and interactive apps.
About Cartesia
Voice agents feel unnatural when speech is slow or flat.
Who it’s for
- Developers building voice agents
- Teams adding speech to interactive apps
When to consider it
Consider Cartesia when low-latency, expressive speech matters for a live voice experience.
Tradeoffs & limitations
- The free plan includes 20,000 credits a month; paid plans start at $5 a month.
SOTA overview · Documentation-based assessment · Sources & review method
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Sources & review method
Documentation-based assessment · Oct 2, 2026 · Prepared with AI assistance; not a hands-on benchmark.
Checked by SOTA · AI-assisted documentation review. Selection advice is our assessment; verify current requirements for your deployment.
Import history & original evidence
Cartesia official website
A real-time text-to-speech API with expressive voices in 44 languages, built for AI agents and interactive apps.
Based on official pages and announcements checked on 2026-10-02. No hands-on test, performance benchmark or popularity ranking is claimed.