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AssemblyAI vs FullStory: 2026 Comparison

AssemblyAI FullStory
Overview Accurate speech-to-text API with built-in audio intelligence features like summarization, sentiment analysis, and topic detection. FullStory captures and indexes every user interaction to provide complete digital experience analytics. Its session replay and heatmap capabilities help teams identify friction points and optimize user journeys.
Pricing Pay-per-use ($-$$$) Paid ($0-custom)
Key Features
  • Speech-to-text
  • Speaker diarization
  • Summarization
  • Sentiment analysis
  • Topic detection
  • PII redaction
  • Real-time transcription
  • Session replay
  • heatmaps
  • error tracking
  • conversion funnels
  • frustration signals
  • search analytics
  • privacy controls
  • API access
Pros
  • High accuracy
  • Rich audio intelligence
  • Easy integration
  • Real-time support
  • Excellent session replay quality
  • Powerful search capabilities
  • Good frustration detection
  • Strong privacy controls
Cons
  • English-focused
  • Can be expensive
  • Limited language support
  • Expensive for high-traffic sites
  • Can impact page performance
  • Storage limitations
  • Complex pricing

AssemblyAI

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FullStory

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