Cartesia Sonic
Cartesia's real-time text-to-speech API with emotion control, built for low-latency voice agents.
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About Cartesia Sonic
Cartesia Sonic is listed in our voice category and is aimed at builders. Cartesia's real-time text-to-speech API with emotion control, built for low-latency voice agents. Pricing, as the maker states it: Freemium. Maturity: Active. We last checked the official link on 2026-10-18.
Cartesia Sonic at a glance
- Category: Voice
- Built for: Developers and teams building with AI agents
- Pricing: Freemium (as the maker states it)
- Official site: cartesia.ai/sonic
- Listed on AgentScout: Oct 18, 2026
Cartesia Sonic FAQ
What is Cartesia Sonic?
Cartesia's real-time text-to-speech API with emotion control, built for low-latency voice agents.
How much does Cartesia Sonic cost?
Cartesia Sonic's pricing, as the maker states it: Freemium. Check the official site for current plans.
What are alternatives to Cartesia Sonic?
Similar tools include Deepgram, Fish Audio, Vexa, Inworld, Qwen Audio Agent and Speechmatics.
Facts from our link-checked listing and the official site. See something wrong? Suggest an edit.
Cartesia Sonic ratings and reviews
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Cartesia Sonic alternatives
Other voice tools in our directory. See all voice tools →
Deepgram
Speech-to-text, text-to-speech and voice agent APIs for building real-time voice agents.
Fish Audio
Fish Audio is a voice AI platform for text to speech, voice cloning and speech to text, with a real-time API for voice agents. Its Drama 3 and S2 models take inline emotion and delivery tags such as whispering, laughing or pauses, it can clone a voice from a few seconds of audio, and its library has more than two million community voices for narration, characters, audiobooks and support agents. The Fish Speech models behind it are published on GitHub and Hugging Face.
Vexa
Open-source meeting transcription API with bots for Meet, Teams and Zoom.
Inworld
Platform and runtime for real-time voice AI and interactive characters, including text-to-speech and agent orchestration for consumer apps.
Qwen Audio Agent
Real-time voice runtime from the Qwen Audio team that keeps agents talking while they think and work on tasks.
Speechmatics
Speech-to-text and voice AI APIs that handle accents, multiple speakers and multilingual speech for voice agents.
Related lists
🏆 See also: Best AI Voice Agent Platforms · All best-of lists
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