Cartesia AIReal-time multimodal AI models built for low-latency, on-device intelligence.
Overview
Key features
- Real-time text-to-speech streaming
- Custom voice cloning
- State space model architecture
- Multilingual voice support
- On-device and edge deployment options
- API and SDK access for developers
Pricing
- Model
- Free
- Category
- Voice AI Agents
- Rating
- 4.8 / 5 (5)
Use cases
Real-time fraud detection
Detect and prevent financial fraud with Cartesia's accurate streaming transcription model and voice agents that improve customer experience and enhance security.
Building voice agents for customer service
Streamline customer service operations and improve customer experience with Cartesia's voice agents that integrate with existing systems and handle complex conversations.
Voice experiences in financial services
Enhance security and streamline operations across the financial ecosystem with Cartesia's voice agents and real-time speech and transcription models.
Pros & Cons
Pros
- Low-latency streaming inference
- High-quality, natural voice synthesis
- Efficient architecture suited for edge devices
- Developer-friendly API and SDKs
Cons
- Smaller model ecosystem than larger competitors
- Voice cloning features raise ethical considerations
- Advanced usage may require technical expertise
Reviews
Average from 5 ratings.
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Does the job
Pretty happy overall. API and SDK access for developers just works and high-quality, natural voice synthesis. Smaller model ecosystem than larger competitors can be annoying, but no dealbreakers — I'd recommend it to a friend without hesitating.
Does the job
Pretty happy overall. API and SDK access for developers just works and efficient architecture suited for edge devices. Voice cloning features raise ethical considerations can be annoying, but no dealbreakers — I'd recommend it to a friend without hesitating.
Skeptical, then convinced
I went in skeptical — most tools in this space overpromise. It actually delivers on on-device and edge deployment options, and developer-friendly API and SDKs caught me off guard. still, I'd recommend giving it a real trial.
Compared a few options
Evaluated this against two competitors. Where it wins: on-device and edge deployment options and low-latency streaming inference. On balance the feature set — especially real-time text-to-speech streaming — justifies the 5 stars for our use case.
Solid for our team
We rolled this out across the team last quarter and high-quality, natural voice synthesis. Real-time text-to-speech streaming fits neatly into how we already work, and real-time text-to-speech streaming removed a step we used to do by hand. but it has held up under daily use.
Q&A
How many credits do I need?
Sonic text-to-speech: One minute of audio generation requires 750-800 credits. 1 credit equals 1 character. This excludes Pro Voice Cloning. Ink speech-to-text: One hour of audio is only $0.39 on the Scale plan. 3 credits equals 1 second of audio.
Asked by Faisal Rahman · Jan 30, 2026
How many credits do I need for Pro Voice Cloning?
It costs 1M credits to train one Professional Voice Clone. Each character of TTS using a Professional Voice Clone will cost 1.5 credits.
Asked by Jasper Vermeer · Jan 17, 2026
What happens to my rollover credits if I change my pricing tier?
You’ll keep all the credits you’ve already paid for when switching tiers. Existing credits remain: Nothing is lost when you upgrade or downgrade. New rollover limit applies: Your rollover cap resets to 2x your new monthly plan rate. Once your balance drops below this cap, future credits will continue rolling over up to the new limit.
Asked by Kalinda Reddy · Jan 15, 2026
What happens if I upgrade to a higher subscription tier?
You will automatically get the amount of credits you paid for on that new tier added to your current credit balance! With rollovers, you can accrue up to 2x your monthly rate.
Asked by Jovana Petrovic · Jan 12, 2026
What if I cancel or downgrade my tier in the middle of a payment period?
You will keep the credits in your account until you use them. Your account will remain in the same tier until the end of that period, at which time you will automatically be downgraded to the selected tier.
Asked by Priyanka Menon · Dec 29, 2025
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