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AssemblyAI vs Deepgram API: 2026 Comparison

AssemblyAI Deepgram API
Overview Accurate speech-to-text API with built-in audio intelligence features like summarization, sentiment analysis, and topic detection. Fast and accurate speech recognition API using end-to-end deep learning for real-time and pre-recorded audio transcription.
Pricing Pay-per-use ($-$$$) Pay-per-use ($-$$$)
Key Features
  • Speech-to-text
  • Speaker diarization
  • Summarization
  • Sentiment analysis
  • Topic detection
  • PII redaction
  • Real-time transcription
  • Nova-2 model
  • Real-time streaming
  • Speaker diarization
  • Language detection
  • Smart formatting
  • Topic detection
Pros
  • High accuracy
  • Rich audio intelligence
  • Easy integration
  • Real-time support
  • Fast processing
  • Competitive pricing
  • Good accuracy
  • Real-time streaming
Cons
  • English-focused
  • Can be expensive
  • Limited language support
  • Fewer audio intelligence features
  • Smaller community
  • Limited TTS options

AssemblyAI

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Deepgram API

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