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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:
 

ROI

Sentiment score
3.9
AssemblyAI cuts transcription costs and time, enhancing efficiency and workflow speed while reducing workforce needs and boosting market presence.
Sentiment score
5.9
Deepgram offers cost efficiency and accuracy, enhancing ROI, despite scalability challenges leading some users to change providers.
I have seen a return on investment; I have saved money, time, and needed fewer employees for this project, which I did solo with the help of AI.
Full Stack Engineer
I would say it is a time-saved and money-saved metric that should be considered here.
Consultant at a tech vendor with 10,001+ employees
He stated that the performance was significantly higher than elsewhere, and he found it suitable for his needs.
Software Engineer at BIFROTEK
When it comes to the evolution of STT, multiple things are considered. One is the technical offering and accuracy of Deepgram, then ease of integration, and cost of implementation.
Technology Architect & Hands-On Leader | Prototyping, Automation, AI/LLM Integration | 20+ Years in at Regalix
 

Customer Service

Sentiment score
4.9
AssemblyAI's customer support is helpful, with strong security, clear documentation, and effective assistance for integration and scaling queries.
Sentiment score
6.1
Deepgram's customer service is responsive and helpful, though resolution times for technical issues can sometimes be slow.
Customer support is definitely great with AssemblyAI.
Consultant at a tech vendor with 10,001+ employees
AssemblyAI should respond more quickly because when I post a ticket, they take too much time to respond to it.
Full Stack Developer at a tech services company with 11-50 employees
Regarding AssemblyAI's governance and security, I think it's pretty much secure since we have all the SOC 2 and SOC 1 reports from the security team of AssemblyAI.
Product Manager at a tech vendor with 11-50 employees
We have extensive support available on Deepgram websites and they have many GitHub repositories.
Technology Architect & Hands-On Leader | Prototyping, Automation, AI/LLM Integration | 20+ Years in at Regalix
The most important aspect of the documentation is that it is structured so that AI can read it effectively.
Software Engineer at BIFROTEK
 

Scalability Issues

Sentiment score
3.9
AssemblyAI efficiently handles scalability and concurrency in batch processing, managing increased workloads while ensuring reliability and competitive pricing.
Sentiment score
6.6
Deepgram offers scalable, accurate transcription with flexible pricing, though some opt for AWS for broader scalability and server location preferences.
It has definitely been integrated in such a way that it handles multiple audios at a time.
Consultant at a tech vendor with 10,001+ employees
AWS provides higher scalability with 10,000 connections at a single go, despite higher latency than Deepgram.
AI Applied Engineer at Flexon Technologies Talent360.ai
I'm not sure if Deepgram offers options to choose the server location, such as having a server in Frankfurt like AWS.
Software Engineer at BIFROTEK
Deepgram's scalability has been fine; there were some limit issues with Vapi.
Co-founder at a tech services company with 1-10 employees
 

Stability Issues

Sentiment score
7.8
AssemblyAI offers reliable transcription with over 95% accuracy, efficient job workflows, and effective error management for professional environments.
Sentiment score
8.4
Deepgram offers a stable, reliable service with strong performance and transparency, experiencing minor connection issues but maintaining accuracy.
We have never faced any issues with downtime.
Technology Architect & Hands-On Leader | Prototyping, Automation, AI/LLM Integration | 20+ Years in at Regalix
Deepgram has been stable and reliable
AI Applied Engineer at Flexon Technologies Talent360.ai
 

Room For Improvement

AssemblyAI needs improvements in speaker identification, accent handling, multilingual support, accuracy, pricing, documentation, and customizable features.
Deepgram users seek improved language support, transcription accuracy, speaker identification, dual-channel audio, voice customization, pricing, and setup stability.
Latency is almost zero, and it's 20 to 40% faster than the industry benchmarks.
Product Manager at a tech vendor with 11-50 employees
Healthcare terms, specifically drug terms related to the medical field, drug products, or chemical products, are sometimes misspelled.
Senior Research Analyst at a consultancy with 201-500 employees
I wish AssemblyAI could improve its multilingual support, as it did not work well when I spoke in different languages.
Ai Engineer at IIT Kharagpur
If it had support for many more languages, especially regional languages, it would be valuable.
Software Engineer at Futurescape Technologies
Considering additional accents from Chilean or Argentine speakers could improve the model's performance with local words.
Co-founder at a tech services company with 1-10 employees
They also came up with their own agent builder framework, where you can directly go to their website and build your voice agent in 10-20 minutes.
Technology Architect & Hands-On Leader | Prototyping, Automation, AI/LLM Integration | 20+ Years in at Regalix
 

Setup Cost

Deepgram offers customizable, competitive pricing for enterprises, promoting efficiency and scalability to meet diverse transcription needs cost-effectively.
My experience with pricing, setup cost, and licensing was good, as I found it to be cheaper without any problems.
Co-founder at a tech services company with 1-10 employees
My experience with pricing, setup cost, and licensing is that pricing is seamless and customizable as needed.
Software Engineer at Futurescape Technologies
 

Valuable Features

AssemblyAI offers high accuracy, speed, and advanced features for transcription, enhancing productivity and satisfaction with affordable insights.
Deepgram excels with fast, accurate transcription, easy integration, industry term recognition, scalable pricing, and excellent customer support.
The main features I appreciate in AssemblyAI are that it provides better accuracy compared to other transcription services, with clear grammar and no errors in spelling mistakes or grammatical mistakes, delivering clear transcription.
Full Stack Developer at a tech services company with 11-50 employees
The speed of real-time transcription stands out to me because it's 20 to 40% faster than the industry benchmark, so speed is definitely one of the pros of AssemblyAI.
Product Manager at a tech vendor with 11-50 employees
I also noticed that it offers flags to check when the audio has stopped. This helped me identify the different users in that audio and properly transcribe the text and make meeting notes and these types of things.
Level 2 Software Engineer at a consultancy with 51-200 employees
Deepgram has positively impacted my organization by achieving our desired results, which is very good from the overall technology perspective, saving a lot of time for the support team since the voice agent replaced the human agents managing the calls, thus improving response time and reducing the time dedicated by those human agents.
Co-founder at a tech services company with 1-10 employees
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.
AI Applied Engineer at Flexon Technologies Talent360.ai
The best thing with Deepgram is they are continually evolving and doing a lot of market research. They take feedback seriously.
Technology Architect & Hands-On Leader | Prototyping, Automation, AI/LLM Integration | 20+ Years in at Regalix
 

Categories and Ranking

AssemblyAI
Ranking in Speech-To-Text Services
5th
Average Rating
8.6
Reviews Sentiment
5.0
Number of Reviews
9
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 (1st), AI Customer Support (3rd), AI Sales & Marketing (5th), AI Scheduling & Coordination (2nd)
 

Mindshare comparison

As of June 2026, in the Speech-To-Text Services category, the mindshare of AssemblyAI is 6.4%, down from 8.4% compared to the previous year. The mindshare of Deepgram is 16.4%, up from 15.9% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Speech-To-Text Services Mindshare Distribution
ProductMindshare (%)
Deepgram16.4%
AssemblyAI6.4%
Other77.2%
Speech-To-Text Services
 

Featured Reviews

Shrimanta Satpati - PeerSpot reviewer
Consultant at a tech vendor with 10,001+ employees
Automated multilingual call transcription has transformed accuracy and reduced manual effort
The best features AssemblyAI offers are its blazing fast transcribing skills and accurate results. It also has the capability of diarization, as well as transcribing in multiple different languages, both in foreign and Indic languages. I particularly value the accurate transcription of the language that the user provides as input and getting the best output without any kind of noise or silence. Automatic silence removal and voice activity detection are the best features of AssemblyAI that I appreciate in my daily use. The outputs are really accurate. AssemblyAI already cares for the overall grammar, syntax, and the different nuances of the particular speakers. I believe the accuracy part has improved significantly from the previous versions that were available and should continue to improve further to become the best product in the market. There was a saving of about 40 to 50% in transcription of audio analytics calls because previously, it was all done by humans, which could take days of effort and cost. This has significantly reduced to a great amount. We tested with Deepgram and AWS transcription service that is already available in the market, and then we switched over 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.
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Top Industries

By visitors reading reviews
University
28%
Wholesaler/Distributor
13%
Comms Service Provider
11%
Manufacturing Company
5%
Educational Organization
10%
Construction Company
9%
Financial Services Firm
8%
University
8%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business10
Midsize Enterprise2
Large Enterprise6
By reviewers
Company SizeCount
Small Business9
Midsize Enterprise1
Large Enterprise1
 

Questions from the Community

What needs improvement with AssemblyAI?
AssemblyAI could be improved because when we have different accents on the same call, it usually fails, especially when we have American, Asian, and Latin American speakers on the same call, making...
What is your primary use case for AssemblyAI?
My main use case for AssemblyAI is meeting and interview transcriptions. We are a culture operating system, so we track organization culture. Our bot joins the meetings of employees, and we convert...
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 AssemblyAI vs. Deepgram and other solutions. Updated: June 2026.
902,495 professionals have used our research since 2012.