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AssemblyAI vs Convex: 2026 Comparison

AssemblyAI Convex
Overview Accurate speech-to-text API with built-in audio intelligence features like summarization, sentiment analysis, and topic detection. A reactive backend-as-a-service with real-time database, serverless functions, and file storage for TypeScript developers.
Pricing Pay-per-use ($-$$$) Freemium (Free-$25/month)
Key Features
  • Speech-to-text
  • Speaker diarization
  • Summarization
  • Sentiment analysis
  • Topic detection
  • PII redaction
  • Real-time transcription
  • Reactive database
  • Serverless functions
  • File storage
  • Scheduled functions
  • Authentication
  • Real-time sync
  • TypeScript-native
  • ACID transactions
Pros
  • High accuracy
  • Rich audio intelligence
  • Easy integration
  • Real-time support
  • True real-time reactivity
  • TypeScript-native
  • ACID transactions
  • Great developer experience
Cons
  • English-focused
  • Can be expensive
  • Limited language support
  • Newer platform
  • Vendor lock-in
  • Limited query language
  • Smaller community