Deepgram

Experience superior Speech to Text accuracy over AssemblyAI

When it comes to speech-to-text, don’t settle for supbar results. Deepgram is nearly 40% more accurate, up to 5x faster, and 2.5x more affordable than AssemblyAI. Find out why innovators are switching from AssemblyAI to the most powerful speech-to-text API.

Start building with Deepgram today.

★★★★★ Based on 250+ reviews

Why switch from 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-2 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.

38%more accurate than Assembly AI
5xfaster than Assembly AI
5xcheaper than Assembly AI
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Assembly AI
13.6%
143.2s
$0.0108
VS
Word Error Rate
Speed
Cost
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Deepgram
8.4%
29.8s
$0.0043
Word Error Rate (WER) [%] Speed (Median Inference Time [Sec] Per Audio Hour). Lower is better.
38%more accurate than Assembly AI
5xfaster than Assembly AI
3xcheaper than Assembly AI

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.

Don’t just take our word for it

Deepgram was named a G2 Leader in 2024, solidifying its position in the industry and making it a top choice among developers. See why.

Trusted by industry leaders

Partner with a true voice AI expert

Make the switch today—Book your demo now!