Cartesia

Low-latency voice synthesis API for real-time AI applications.

Overview

Cartesia specializes in ultra-fast, high-quality TTS designed for interactive AI voice agents. Its streaming-first approach and free tier make it the frontier choice for hackathon teams building real-time voice experiences that demand sub-second response times.

Best for

• Real-time voice agents and streaming TTS
• Apps requiring sub-second voice response latency
• Hackathons building interactive voice interfaces

Trade-offs

What XeroHack pre-wires

When you pick Cartesia in the interview, the engine emits these files into your scaffold:

• Cartesia SDK import
• API key env var
• Streaming voice config