Speech-to-Text & Text-to-Speech

Deepgram

Speech-to-text

Cartesia

Low-latency realtime text-to-speech models

Hume AI

Emotionally expressive voice AI and speech models

AssemblyAI

Speech-to-text and speech understanding APIs

Speechmatics

Speech recognition API supporting many languages

Gladia

Realtime and async speech-to-text API

Soniox

Speech recognition models and API

Rime

Text-to-speech voices built for conversational applications

Resemble AI

Voice generation and voice cloning platform