Deepgram vs. AssemblyAI

See why 200,000+ developers prefer Deepgram for streaming and batch STT.

Deepgram offers the most accurate streaming STT API
Deepgram far outperforms Assembly AI in performance benchmarks
Deepgram offers on-premises and cloud APIs

Based on 250+ reviews

Deepgram beats AssemblyAI

Build with enterprise-grade speech recognition that's faster, more accurate, and affordable. No compromises.

Flexible deployment
Choose cloud, on-premises, or private cloud to securely manage voice and transcription data with Kubernetes, Docker, and pre-built VM support for easy setup in any environment.

Custom model training

Deepgram offers tailored ASR models optimized with customer-specific data, ideal for industries with specialized jargon, accents, or unique speech patterns.

Enterprise security

Protect customer data privacy and ensure regulatory compliance with HIPAA-compliant transcription.

Innovation leader in Voice AI

Deepgram's deep learning models are optimized for speech data and trained on diverse datasets, delivering industry-leading performance in pre-recorded and real-time transcription.

Fast and accurate transcription

Deepgram's speech-to-text outshines AssemblyAI in both speed and accuracy, with domain-specific use case models (e.g. Nova-3 Medical) and custom training options that will give you a competitive edge.

Go beyond transcription

Build a dynamic full-stack voice agent with Deepgram's Voice AI platform, using speech-to-text, custom LLM, and text-to-speech models. Enjoy optimized performance and low latency with our open-source code.

Comprehensive Voice AI Platform

Speech to Text

Power your products with world-class speech recognition. Everything developers need to build with confidence and ship faster. Unmatched performance guaranteed: 

• Accuracy: 30% lower word error rate (WER) 
• Speed: up to 40x faster inference time 
• Cost: 3-7x lower price

Text to Speech

Generate lightning fast, human-like voices for real-time AI and high throughput applications.  

• Quality: Human-like tone, rhythm, and emotion 
• Speed: less than 250 ms latency 
• Scale: Cost-efficient and optimized for high-throughput applications

Voice Agents

A unified voice-to-voice API that enables natural-sounding conversations between humans and machines. With one powerful API, create LLM-powered AI agents that listen, think, and speak with the same intelligence and emotive quality that a person can.