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Cartesia pricing, features, company info, and alternatives
A factual product page for Cartesia.
Last updated April 2026 · Pricing and features verified against official documentation
Pricing
Current public pricing tiers on file for Cartesia, last verified Apr 24, 2026.
Free
$0 / month
Includes 20K model credits and $1 prepaid for agents.
Pro
$4 / month
Billed yearly; includes 100K model credits, $5 prepaid for agents, and instant voice cloning.
Startup
$39 / month
Billed yearly; includes 1.25M model credits, $49 prepaid for agents, and organization support.
Scale
$239 / month
Billed yearly; includes 8M model credits, $299 prepaid for agents, and higher concurrency.
Enterprise
Custom
Custom usage pricing, concurrency, enterprise support, and compliance options.
What You Can Do With It
The main capabilities that shape how people use Cartesia today.
Serve Sonic text-to-speech and Ink speech-to-text models from the same real-time API platform.
Build voice agents with the Line SDK, agent runtime, telephony support, evaluations, and observability workflows.
Stream expressive speech quickly enough for conversational interfaces, with Sonic 3 positioned for low-latency voice apps.
Keep speech models, agent runtime, and agent configuration inside one developer stack instead of stitching together multiple vendors.
Best For
Who Cartesia is most clearly built for.
Developers building production voice agents with tight latency budgets.
Teams that want one vendor for speech models plus agent runtime infrastructure.
Apps that need streaming voice cloning and agent tooling in the same platform.
Company
Leadership and company context for Cartesia AI, Inc..
CEO
Karan Goel
Founders
Karan Goel, Albert Gu, Arjun Desai, Brandon Yang
Platforms
Where you can use Cartesia today.
Web
API
SDK
Privacy Notes
Publicly stated data-handling notes that matter when evaluating Cartesia.
Cartesia says prompts, recordings, outputs, and related content may be used to improve and train the models behind its services.
The privacy policy says users can request that selected categories of content stop being used for future model training.
Access
How to integrate or build around Cartesia.
Public API
Yes
Docs
Available
Alternatives
Other tools worth considering alongside Cartesia.
Voice and audio AI platform for speech, cloning, dubbing, and agents.
Voice AI platform for speech-to-text, text-to-speech, voice agents, and audio intelligence.
Speech AI platform for transcription, streaming audio, and speech understanding.
Voice AI platform for building, testing, and running phone agents.
Product Snapshot
Cartesia is a developer voice AI platform centered on real-time speech models and agent infrastructure. It combines text-to-speech, speech-to-text, and voice-agent runtime tooling for teams building production conversational audio systems.
What You Can Do With It
- Generate expressive streaming speech with Sonic models and run streaming transcription with Ink models.
- Build voice agents with Cartesia’s Line SDK and agent runtime instead of wiring together separate speech and runtime vendors.
- Configure telephony-aware agent behavior, evaluations, and observability workflows for conversational systems.
- Clone voices and ship low-latency audio experiences through the same API stack used for agent execution.
Why It Stands Out
Cartesia packages speech models and agent infrastructure together rather than stopping at TTS or STT APIs. That makes it more of a voice application platform than a single-model provider, especially for teams optimizing around response time and production agent behavior.
Tradeoffs To Know
- Self-serve paid plans are billed yearly even when prices are presented as monthly equivalents.
- Agent pricing combines prepaid credits and usage-based voice runtime fees rather than one flat subscription.
- Cartesia’s privacy policy says the services are designed for users in the United States only.
- Some enterprise controls and compliance options are reserved for custom plans.