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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
8.0
Reviews Sentiment
6.1
Number of Reviews
1
Ranking in other categories
No ranking in other categories
Deepgram
Ranking in Speech-To-Text Services
1st
Average Rating
8.4
Reviews Sentiment
5.9
Number of Reviews
11
Ranking in other categories
Text-To-Speech Services (2nd), AI Customer Support (2nd), AI Sales & Marketing (6th), AI Scheduling & Coordination (1st)
 

Mindshare comparison

As of May 2026, in the Speech-To-Text Services category, the mindshare of AssemblyAI is 6.1%, down from 9.1% compared to the previous year. The mindshare of Deepgram is 18.0%, up from 14.0% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Speech-To-Text Services Mindshare Distribution
ProductMindshare (%)
Deepgram18.0%
AssemblyAI6.1%
Other75.9%
Speech-To-Text Services
 

Featured Reviews

Khemit Verma - PeerSpot reviewer
Full Stack Developer at a tech services company with 11-50 employees
Accurate transcripts with clear grammar have supported reliable speaker-based dialogue analysis
A few drawbacks I observed in the speaker identification are that in some videos where text and names appear on the video frames, AssemblyAI does not identify the actual speaker name, instead providing generic names such as Speaker A, Speaker B, Speaker C, or Speaker X, Y, Z. AssemblyAI does not identify the real speaker in some audio or video files, just sending Speaker A, Speaker B, or Speaker C. They are not easily identifying speakers in some instances. AssemblyAI does not provide a cloud service; I simply upload the audio file to the API, and they store it somewhere internally to send me the transcription text. For additional functions, the API does not provide video uploading functionality, and I need to convert video to audio first before uploading it to AssemblyAI.
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

"The primary benefit I receive from their product is much more accurate transcription; first, it is a very affordable service, and second, the accuracy is much better compared to other services such as Deepgram or AWS transcription services, which are the main benefits."
"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 best thing with Deepgram is they are continually evolving and doing a lot of market research, and they take feedback seriously."
"The solution's Speech-to-Text conversion feature is really awesome."
"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."
"The features that I have been using in the tool have been very stable."
"The best features of Deepgram for me are the level of transcription accuracy it provides and the amount of time it saves."
"The solution's most valuable feature is its speed of transcription, as it is one of the fastest tools, especially if you compare it to the second fastest solution that you can get, which is 20 times faster, so it is not just a marginally faster product."
"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."
 

Cons

"AssemblyAI should respond more quickly because when I post a ticket, they take too much time to respond to it."
"The area of live transcription could be improved. Sometimes, Deepgram's WebSocket is disposed of due to redundancy."
"In comparison to Deepgram, I would say that the transcript accuracy offered by other products is much higher."
"I would not recommend Deepgram to other users because it does not properly identify video communication."
"Even though Deepgram has many customization options, I wish that Deepgram had voice cloning customization to a much larger extent."
"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."
"I would like it to be more accurate."
"The area of live transcription could be improved. Sometimes, Deepgram's WebSocket is disposed due to redundancy."
"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."
 

Pricing and Cost Advice

Information not available
"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."
"Deepgram is a cheap solution."
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Top Industries

By visitors reading reviews
No data available
Educational Organization
10%
Financial Services Firm
8%
University
8%
Construction Company
8%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
No data available
By reviewers
Company SizeCount
Small Business9
Midsize Enterprise1
Large Enterprise1
 

Questions from the Community

What needs improvement with AssemblyAI?
A few drawbacks I observed in the speaker identification are that in some videos where text and names appear on the video frames, AssemblyAI does not identify the actual speaker name, instead provi...
What is your primary use case for AssemblyAI?
I use AssemblyAI only with audio files, not for real-time transcription. I mainly use only US English, and I have not tried other languages. I upload audio files through AssemblyAI API, and they pr...
What is your experience regarding pricing and costs for Deepgram?
My experience with pricing, setup cost, and licensing is that pricing is seamless and customizable as needed. Currently, we use the growth plan. For enterprise, they offer a higher tier, so it is c...
What needs improvement with Deepgram?
Deepgram has a vast UI and a vast range of models, but there could be a simpler version for creating AI agents rather than providing a full-fledged platform for minimal use cases. It could be multi...
What is your primary use case for Deepgram?
My main use case for Deepgram is creating voice agents to automate the customer support part and reply to FAQs and customer queries. Deepgram has multiple models, speech to text and text to speech ...
 

Comparisons

 

Overview

Find out what your peers are saying about Deepgram, Microsoft, Google and others in Speech-To-Text Services. Updated: May 2026.
893,164 professionals have used our research since 2012.