Fish Audio vs Cartesia AI
Lightning-fast real-time voice synthesis with better multilingual support and transparent pricing.
Fish Audio
Voice samples
Natural Conversation
"what is 6 7 anyway?"
Gen Z Slang
"low-key that's such a vibe though"
Educational Content
"the mitochondria is the powerhouse of the cell, and also the only thing i remember from biology"
Cartesia AI
Voice samples
Natural Conversation
"what is 6 7 anyway?"
Gen Z Slang
"low-key that's such a vibe though"
Educational Content
"the mitochondria is the powerhouse of the cell, and also the only thing i remember from biology"
About Fish Audio
Fish audio is the most expressive and human-like AI audio platform. We are also the best multi-lingual open source audio model with over 22k stars on github.
Instant Voice Clone
Fish audio can clone the nuances of human speech, including accent, timbre, and speaking habits, all while being expressive, emotional, and emphatic with just 10 seconds of audio.
Realtime Streaming API
We offer a real time streaming API at sub 500ms latency.
Voice Library
We offer hundreds of thousands of UGC voices in our voice library all optimized for real time conversation agents.
About Cartesia AI
Cartesia focuses on ultra-low-latency voice models for real-time agents. Its Sonic 3 streaming TTS emphasizes fast time-to-first-audio, fine-grained prosody control, and developer-friendly WebSocket/SSE APIs.
Sonic 3 (Streaming TTS)
Latest streaming model with industry-leading latency and controls for volume, speed, and emotion.
WebSocket & SSE APIs
Real-time synthesis via WebSocket/SSE with input-streaming to preserve prosody during incremental generation.
Speech-to-Text
Streaming STT for conversational agents that pair with Sonic in low-latency pipelines.
Transparent Pricing Comparison
Compare pricing and value
Provider
Price per Character
Estimate per Minute*
Estimate per Hour*
Cartesia AI
$0.00004
$0.05
$2.93
Fish Audio
$0.00004
$0.05
$2.99
*this is a best guess estimate
Pricing Summary
Fish Audio and Cartesia AI offer nearly identical pricing for real-time voice synthesis, with both platforms delivering sub-500ms latency. Fish Audio differentiates itself with instant voice cloning capabilities, a massive library of hundreds of thousands of UGC voices, and broader multilingual support—making it ideal for developers who need voice variety alongside real-time performance.
Build Real-Time Voice Apps Today
Ultra-low latency streaming at developer-friendly pricing. Start free, scale affordably.