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
Trusted by industry leaders
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.
Raising the bar for ASR performance
All the features. Better performance. Lower cost.
Word Error Rate (WER) [%] Speed (Median Inference Time [Sec] Per Audio Hour). Lower is better.
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.
Switching to Deepgram is easy
Switching to Deepgram is easy
Getting started with Deepgram is easy with our API Playground, detailed guides, and clear documentation. Go ahead. Take it for a spin and get $200 in free credits.
Don’t just take our word for it
Deepgram has been named a G2 Leader in 2025, solidifying its position in the industry and making it a top choice among developers. See why.
Partner with a true voice AI expert
Make the switch today—Book your demo now!