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AssemblyAI

Audio

Developer-focused AI speech-to-text API

4.6(1,400)
Freemium · from $0.37/hour

About AssemblyAI

AssemblyAI provides best-in-class speech-to-text, speaker diarization, sentiment analysis, and audio intelligence APIs — used by developers building transcription features.

Key Features

  • Speech-to-text API
  • Speaker diarization
  • Sentiment analysis
  • Topic detection
  • PII redaction

Pros & Cons

Pros

  • Best-in-class accuracy
  • Great developer docs
  • Rich audio intelligence
  • Fair pricing

Cons

  • Developer-only (no GUI)
  • API knowledge required
  • English-focused
speech-to-textapideveloperdiarizationtranscription

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Plans start from $0.37/hour.

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