Voice AICommercial✦ Free Tier
Cartesia
Real-time TTS optimized for conversational AI
App Infrastructure
About
Ultra-low-latency streaming TTS (<80ms) built for real-time voice agents and phone systems. State Space Model architecture (Sonic) delivers natural prosody at production latency.
Choose Cartesia when…
- •You're building real-time voice agents where latency is critical (<80ms)
- •You need streaming TTS that works well in phone systems
- •You want SSM-based TTS as an alternative to diffusion models
Builder Slot
How does your AI speak and listen?Optional for most stacks
Speech synthesis and recognition APIs — text-to-speech, speech-to-text, and real-time audio intelligence
Dev Tools
Not applicable
App Infra
Optional
Hybrid
Optional
Other tools in this slot:
Stack Genome Detection
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npm packages
@cartesia/cartesia-jspip packages
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CARTESIA_API_KEYIntegrates with (1)
Alternatives to consider (2)
Pricing
✦ Free tier available
Pay-as-you-go$0.09/1000 chars
ScaleCustom
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