Tools & Platforms
Speech-to-Text API
A service that converts audio into text, which other apps plug into instead of building transcription themselves.
Also known as: STT API,transcription API
A speech-to-text API is a developer service that takes an audio file or live audio stream and returns written text, so other products can offer transcription without training their own speech-recognition model. Deepgram and AssemblyAI are the two leading providers, quietly powering the "listening" behind meeting note-takers, call centre tools, captioning apps, and voice agents. Quality varies by accent, background noise, and number of speakers; good providers exceed 90% word accuracy on clear audio in common languages. Distinct from text-to-speech and voice cloning, which go the opposite direction — turning text into new audio.
