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Cartesia AI that learns and interacts like humans

Real-time text-to-speech API in 40+ languages

Cartesia’s Sonic-3.5 streaming TTS API generates natural, expressive voices with support for laughter and emotion across 40+ languages. Built for AI agents and interactive applications.

Free tier

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Feature
Cartesia AI that learns and interacts like humans
Cursor
PricingFreemiumFreemium
Price from$20/mo
Free tierYesYes
APIYesYes
Open sourceNoNo
PlatformsAPIBrowser Extension
ModelsCartesiaCursor
Context window1M128k
Launched20242024
IntegrationsSlack, GitHub

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Tags: Speech-to-text / Tts

Specs

PricingFreemium
Free tierYes
APIYes
Open sourceNo
PlatformsAPI
ModelsCartesia
Context window1M
Launched2024