Cartesia
Voice AI APIs · Freemium
About
Low-latency text-to-speech and voice APIs built for real-time voice agents.
Key features
- Ultra-low-latency TTS
- Voice cloning
- Many languages
- Speech-to-text
Best for
- — Real-time voice agents
- — Developers needing fast TTS
- Pricing
- Freemium
- Platforms
- API, Web
- Last checked
- 2026-10-29
- Status
- Listed, not yet tested
Our take
Very fast, which matters for conversation. Developer-focused with little for non-coders.
Features and pricing change often — confirm on cartesia.ai before you commit.
Alternatives to Cartesia
| Tool | Type | Pricing | Best for |
|---|---|---|---|
| Cartesia (this) | Voice AI APIs | Freemium | Real-time voice agents |
| Deepgram | Voice AI APIs | Freemium | Real-time transcription in apps |
| AssemblyAI | Voice AI APIs | Freemium | Developers transcribing recordings |
| ElevenLabs | Text-to-speech | Freemium | Voice-overs for videos |
| Suno | Music generation | Freemium | Background music drafts |
| Descript | Audio editing | Freemium | Podcast editing |
| Otter.ai | Transcription & meeting notes | Freemium | Meeting transcription |