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Deepgram vs AssemblyAI
Side-by-side comparison of features, pricing, and ratings
Pricing
Freemium
Freemium
Plans
$0.0043/min
$4/hr committed
Custom
$0
$0.37/hr
Custom
Rating
—
—
Popularity
6.3k views
5.6k views
Skill Level
Advanced
Advanced
API Available
Platforms
API
API
Categories
🎙️ Voice & Speech
🎙️ Voice & Speech
Features
Real-time speech-to-text API
Real-time text-to-speech API
Voice Agent API combining STT, TTS, and LLM orchestration
Audio Intelligence API for analytics
Flux multilingual conversational STT (10 languages)
Nova transcription STT model
Speak text-to-speech model
Automatic language detection
Self-hosted deployment option
Batch and real-time processing modes
Enterprise-grade security and compliance
Custom model training for unique workflows
Powered by Deepgram partner program
API playground for testing
Speech-to-Text API in 99 languages
Universal-3 Pro model for high accuracy
Streaming Speech-to-Text with real-time output
Real-time turn detection and interruption handling
Voice Agent API for production voice agents
Speech Understanding API for sentiment, chapters, summaries
Guardrails for PII redaction and content moderation
LLM Gateway with multi-model routing and fallback
Natural language prompting for custom transcriptions
Unlimited concurrent streams at scale
Industry-leading accuracy benchmarked