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About Cartesia
Cartesia offers speech models through a single API. Sonic generates speech from text, Ink transcribes speech to text, and Managed Agents builds voice agents on top of both. The company says the models are fast enough for live conversation, and the website has a voice library, a language list and a talking demo agent.
It is aimed at developers and companies building voice products such as phone agents for finance, healthcare and government. There is a self-serve way to try it, and a sales contact for larger deployments.
Strengths
- One API covers text-to-speech, transcription and voice agents
- Built for low-latency, real-time conversation
- Documentation for developers is published
Limitations
- Mainly an API for developers rather than a consumer app
- Cloud only, with no local option
- Larger deployments go through sales
Details
- Pricing
- PaidPlans are listed on the pricing page, with a sales contact for larger deployments.
- License
- Proprietary
- Developer
- Cartesia
- Platforms
- Web
- How it runs
- Hosted service
- Account
- Required
- Works offline
- No
- Best suited for
- Developers building real-time voice agents and speech features
- Categories
- AI voice, AI developer tools
- Last verified
- Added
- Sources
Alternatives to Cartesia
Compare allSoftware that can replace Cartesia for an important use case, and what changes if you switch.
ElevenLabs
An AI voice platform for text to speech, voice cloning, dubbing, speech to text and music.
ElevenLabs is a freemium online platform with a large voice library in over 70 languages, voice cloning, dubbing and music, plus an API and SDKs for developers.
Fish Audio
A web platform for AI text-to-speech, voice cloning and speech-to-text with a large community voice library.
Fish Audio offers text-to-speech, voice cloning and speech-to-text with a documented API on a freemium plan, plus over two million community voices and inline emotion tags.
Speaches
A self-hosted, OpenAI API-compatible server for local speech-to-text, translation and text-to-speech models.
Speaches is a free MIT-licensed self-hosted server with an OpenAI-style API for local speech-to-text and text-to-speech, removing the cloud dependency but requiring Docker setup.
Murf AI
A web studio for creating AI voiceovers and dubbing videos, with a voice API for developers.
Murf AI is a freemium web voiceover studio with a dubbing tool and a voice API, aimed more at creators making narration than at real-time voice agents.
WellSaid
A web-based AI voice generator for producing voiceovers from scripts in several styles and dialects.
WellSaid provides voices made with professional voice actors and an API for integration, focused on marketing and training voiceovers rather than real-time transcription or agents.
Voice.ai
An AI voice changer and text-to-speech service with a large library of voices and a desktop installer.
Voice.ai combines a voice changer and text-to-speech with APIs and SDKs on a freemium plan, and has shifted its focus toward business voice agents.
Cartesia as an alternative
Listings that name Cartesia as an alternative.
Kokoro-FastAPI
A Dockerized, OpenAI-compatible server for running the Kokoro-82M text-to-speech model on your own hardware.
Cartesia is a paid cloud API for real-time text-to-speech, transcription and voice agents, replacing your own hardware with a hosted service and no local option.
Similar software
Related functionality, not necessarily a direct replacement.
CosyVoice
An open-source multilingual text-to-speech model with zero-shot voice cloning, inference and training code.
Orpheus TTS
An open text-to-speech model built on a language model, aimed at natural, emotionally expressive speech.
Whisper
An open-source speech recognition model from OpenAI for transcribing and translating audio on your own machine.
Rev
An AI and human transcription service with captioning, a transcript editor and a mobile voice recorder app.
Sonix
An online transcription service that converts audio and video to text in over 54 languages.
