OpenAI Whisper vs. AssemblyAI
Learn why customers choose AssemblyAI to build powerful speech-to-text products that exceed industry standards.
• Managed infrastructure
• Built-in diarization
• Ongoing upgrades & maintenance
At a glance: Whisper vs. AssemblyAI
The most accurate speech-to-text models on the market with top performance rankings across major industry benchmarks.
Feature | AssemblyAI Universal | OpenAI Whisper |
|---|---|---|
Word Accuracy Rate | 93.3% | 91.6% |
Word Error Rate (English) | 6.7% | 8.4% |
Automatic Language Detection Accuracy | 100% English (EN) 99.7% Hindi (HI) | 98% English (EN) 83.7% Hindi (HI) |
Speaker Diarization |  | No additional audio intelligence capabilities |
PII redaction | | No additional audio intelligence capabilities |
Summarization | | No additional audio intelligence capabilities |
Sentiment Analysis | | No additional audio intelligence capabilities |
Streaming Speech-to-Text | | No native capabilities |
AssemblyAI’s managed API endpoint and diarization won me over—something Whisper couldn’t provide.
Go beyond Whisper's limits with Assembly's full Speech AI suite.
Transcribe over 99+ languages and counting, including Global English (English and all of its accents).
Detect the number of speakers in your audio file, with each word in the text associated with its speaker.
Automatically detect languages and route to the appropriate model for transcription.
View word-by-word timestamps across the entire transcript text.
Detect and replace profanity in the transcription text with ease.
Automatically add casing and punctuation of proper nouns to the transcription text.
Boost accuracy for vocabulary that is unique or custom to your specific use case or product.
Get a confidence score for each word in the transcript.
Join 200K+ developers building new experiences with voice data
"We have had a phenomenal experience so far. The integration was simple and easy for developers to get started. The accuracy is better than any other tools in the market (and we have tried them all). Highly recommend!"
"Works incredibly well out of the box. Allowed us to focus on product instead of infrastructure. As a result, we were able to bring a transformative new product to market in half the time."
"The accuracy was strong, but the great documentation and unique models like Auto Chapters and Sentiment Analysis is what really won us over."
"Partnering with AssemblyAI has made it easy for us to deliver world-class voice intelligence powered by market-leading speech-to-text technology."
Get started in minutes
Partner with the leader in Speech AI to build powerful products with breakthrough industry impact.
