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AssemblyAI vs Deepgram comparison

 

Comparison Buyer's Guide

Executive Summary

Review summaries and opinions

We asked business professionals to review the solutions they use. Here are some excerpts of what they said:
 

Categories and Ranking

AssemblyAI
Ranking in Speech-To-Text Services
5th
Average Rating
9.0
Reviews Sentiment
8.4
Number of Reviews
1
Ranking in other categories
No ranking in other categories
Deepgram
Ranking in Speech-To-Text Services
1st
Average Rating
8.6
Reviews Sentiment
6.0
Number of Reviews
10
Ranking in other categories
Text-To-Speech Services (4th), AI Customer Support (5th), AI Sales & Marketing (7th), AI Scheduling & Coordination (2nd)
 

Mindshare comparison

As of January 2026, in the Speech-To-Text Services category, the mindshare of AssemblyAI is 6.4%, down from 9.5% compared to the previous year. The mindshare of Deepgram is 19.7%, up from 6.5% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Speech-To-Text Services Market Share Distribution
ProductMarket Share (%)
Deepgram19.7%
AssemblyAI6.4%
Other73.9%
Speech-To-Text Services
 

Featured Reviews

Ishu Patil - PeerSpot reviewer
Python Developer and Application Analysts at All Solutions
Automated call reviews have saved time and protect sensitive customer information
AssemblyAI can be improved by addressing accuracy, which is the aspect they can improve in noisy audio and overlapping speakers because that's where transcripts sometimes lose clarity. The speaker diarizations could be more consistent when multiple people talk at the same time, and the summarization could be more customizable, such as letting us control the format, bullets, action times, or departmental wise. Lastly, better monitoring tools and clearer error messages would help in production scaling. Accuracy in noisy audios must be improved, overlapping speaker handling must be improved, and also more stable diarizations. Support for more languages plus accents would also make us able to boost our work more effortlessly, and custom vocabulary boost would better support company-specific terms, product names, and technical words.
Arunkumar HG - PeerSpot reviewer
Technology Architect & Hands-On Leader | Prototyping, Automation, AI/LLM Integration | 20+ Years in at Regalix
A Powerful, Adaptable, and Constantly Evolving STT Solution for Voice Automation
Honestly, Deepgram has been exceptionally proactive in addressing the primary area that needed improvement. My main challenge was with the real-time detection of when a user has finished speaking in a live conversation, which is critical for a responsive voice bot. They directly solved this by releasing their Flux model. Because Flux is a recent release, I haven't yet had enough time to thoroughly test it and identify new limitations. At this stage, any "improvement" would be more of a "nice-to-have" feature rather than a fix for an existing problem. The core service is already very robust and meets all of our current needs. What additional features should be included in the next release? ---------------------------------------------------------------- Looking toward the future, here are a few features that could add even more value to an already excellent platform: * Advanced Built-in Analytics: While I can get the raw transcript and build my own analytics pipeline, it would be powerful to have features like sentiment analysis, emotion detection, or automatic summarization offered directly through the API. This would save significant development time. * More Granular Speaker Diarization: For calls with multiple participants, enhancing the real-time speaker diarization (labeling who is speaking) to be even more precise would be a fantastic addition for creating detailed call analyses. * Tighter Integration with TTS: Since Deepgram is also expanding into Text-to-Speech (TTS), offering a more seamlessly integrated STT-to-TTS pipeline could simplify the development stack for creating voice agents from start to finish. * Specialized, Pre-Trained Industry Models: While the general models are highly accurate, offering even more specialized, pre-trained models for specific industries like finance, healthcare, or legal-which are heavy on specific jargon-could push the accuracy even higher for those niche use cases.

Quotes from Members

We asked business professionals to review the solutions they use. Here are some excerpts of what they said:
 

Pros

"AssemblyAI gives us high quality speech to text with strong out of the box features including diarization, summaries, chapters, and PII redactions; the big win is we don't just get transcripts, we get structured insights we can plug into analytics fast."
"The solution's Speech-to-Text conversion feature is really awesome."
"The most valuable capabilities of Deepgram that I've found so far include low latency, as it offers less than 200 milliseconds, which is not provided by any other text-to-speech models."
"The features that I have been using in the tool have been very stable."
"The best thing with Deepgram is they are continually evolving and doing a lot of market research, and they take feedback seriously."
"The recognition of industry-specific terminology phrases and abbreviations is really important for us. We were able to get a good level of industry specificity with Deepgram."
"Deepgram is able to handle large volumes of audio data without compromising accuracy."
"Deepgram's transcription stands out compared to other solutions primarily due to its speed and accuracy; those are important points for me because not all providers or tools handled Spanish well, but Deepgram adjusted perfectly for that use case, and we also chose 11Labs voice, a South American voice, which worked very well with Deepgram."
"Deepgram's low latency transcription has greatly impacted my ability to deliver reliable voice agents and provided very good transcription."
 

Cons

"AssemblyAI can be improved by addressing accuracy, which is the aspect they can improve in noisy audio and overlapping speakers because that's where transcripts sometimes lose clarity."
"We haven't seen a return on investment with Deepgram so far; we have been building POCs for the last two years but recently switched to AWS in the last two months due to scalability issues with the pay-as-you-go model."
"We've had issues in the past where it generates the transcript, and a lot of the text is duplicated."
"The traditional Speech-to-Text doesn't understand when the user is done speaking in bot conversations."
"Deepgram is currently restricted to only the English variants, but it should include other languages, such as German or French."
"Regarding improvements for Deepgram, I think the quality of the transcriptions could be enhanced, as the Spanish accent poses challenges, making it harder to transcribe some words, and considering additional accents from Chilean or Argentine speakers could improve the model's performance with local words."
"When I had an AI interview for coding, Deepgram didn't capture the names of programming languages or well-known LLMs accurately all the time."
"Even though Deepgram has many customization options, I wish that Deepgram had voice cloning customization to a much larger extent."
"I would like it to be more accurate."
 

Pricing and Cost Advice

Information not available
"Deepgram is a cheap solution."
"The pricing is moderate."
"The solution’s pricing is cheap."
"When using Deepgram, one needs to pay for the hours or minutes for which the transcription is needed."
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Top Industries

By visitors reading reviews
University
18%
Comms Service Provider
16%
Manufacturing Company
8%
Insurance Company
8%
Financial Services Firm
10%
Comms Service Provider
9%
University
9%
Computer Software Company
9%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
No data available
By reviewers
Company SizeCount
Small Business8
Midsize Enterprise1
Large Enterprise1
 

Questions from the Community

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What is your experience regarding pricing and costs for Deepgram?
My experience with pricing, setup cost, and licensing was good, as I found it to be cheaper without any problems.
What needs improvement with Deepgram?
Even though Deepgram has many customization options, I wish that Deepgram had voice cloning customization to a much larger extent. I also wish that the price were a bit lower if possible.
What is your primary use case for Deepgram?
My main purpose for Deepgram was to convert meeting voices to text very easily, and the other purpose was for content creation. I mostly use Deepgram for those two purposes.
 

Overview

Find out what your peers are saying about Deepgram, Microsoft, Google and others in Speech-To-Text Services. Updated: January 2026.
881,082 professionals have used our research since 2012.