AssemblyAI vs Fish Audio

Side-by-side comparison of AssemblyAI and Fish Audio: pricing, features, API access, and community ratings.

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	AssemblyAI Voice AI infrastructure for builders — industry-leading speech-to-text and voice agent APIs Visit	Fish Audio The most expressive, emotionally controllable real-time AI voice platform Visit
Category	Voice & speech	Voice & speech
Pricing	Freemium	Freemium
Starting price
Free tier
Audience	Technical	All audiences
API available
Open source
Self-hostable
Model provider	AssemblyAI (Universal-3 Pro, Universal-2, Universal-Streaming, Whisper-Streaming)	Fish Audio (proprietary models: Fish Audio S2.1 Pro, Fish Speech, OpenAudio)
Founded	2017	2023
Headquarters	San Francisco, United States
Key strengths	·Industry-leading transcription accuracy across 99 languages ·Real-time and pre-recorded speech-to-text with async-level accuracy ·Full Voice AI platform: transcription, understanding, agents, and guardrails in one place ·No concurrency limits or throttles — scales from MVP to 400,000+ hours/month	·Ultra-low latency TTS ·Voice cloning from as little as 10-15 seconds of audio ·2,000,000+ community voices ·30+ language support