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AssemblyAI vs Heap: 2026 Comparison

AssemblyAI Heap
Overview Accurate speech-to-text API with built-in audio intelligence features like summarization, sentiment analysis, and topic detection. Heap automatically captures every user interaction on your website or app without requiring manual event tracking. It enables retroactive analysis of user behavior data from the moment of installation.
Pricing Pay-per-use ($-$$$) Freemium ($0-custom)
Key Features
  • Speech-to-text
  • Speaker diarization
  • Summarization
  • Sentiment analysis
  • Topic detection
  • PII redaction
  • Real-time transcription
  • Auto-capture technology
  • retroactive analytics
  • funnel analysis
  • session replay
  • user segmentation
  • conversion tracking
  • data governance
  • integrations
Pros
  • High accuracy
  • Rich audio intelligence
  • Easy integration
  • Real-time support
  • Automatic event capture
  • No manual tagging required
  • Retroactive data analysis
  • Easy implementation
Cons
  • English-focused
  • Can be expensive
  • Limited language support
  • Can collect excessive data
  • Higher cost for large sites
  • Limited real-time capabilities
  • Data can be noisy without curation