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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
4.7
Organizations using AssemblyAI save 85% transcription time and $35,000-$45,000 annually, enhancing efficiency and user experience.
Sentiment score
5.9
Deepgram offers cost efficiency and accuracy, enhancing ROI, despite scalability challenges leading some users to change providers.
There was a 98% cost reduction on transcription because traditional manual human transcription costs a lot, so by using AssemblyAI, the cost dropped significantly.
Full Stack Developer at a university with 10,001+ employees
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
Before using other tools for summarization of writers' stories, it took a lot of time, but with AssemblyAI, the time to convert a story into a summary has decreased significantly.
Senior Software Engineer at Varaha Systems
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
4.5
AssemblyAI's customer service is positive, with helpful documentation, responsive support, and personalized engagement despite occasional response delays.
Sentiment score
6.1
Deepgram's customer service is responsive and helpful, though resolution times for technical issues can sometimes be slow.
It has excellent documentation and SDKs, responsive developer channels, and clear API error messages.
Full Stack Developer at a university with 10,001+ employees
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
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
4.7
AssemblyAI efficiently scales with businesses, handling high data loads and concurrency seamlessly, without hardware management concerns for users.
Sentiment score
6.6
Deepgram offers scalable, accurate transcription with flexible pricing, though some opt for AWS for broader scalability and server location preferences.
The API is built to handle enterprise-level volumes, which means we can scale from a small local test environment to thousands of active students without making any changes to our back-end code.
Full Stack Developer at a university with 10,001+ employees
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
The scalability of AssemblyAI for my organization is good as we have a high volume of scale right now, with around 25,000 requests, and it is performing well.
Senior Software Engineer at Varaha Systems
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
8.2
Users praise AssemblyAI for stable performance, high API uptime, and consistent accuracy, with minor variability across languages.
Sentiment score
8.4
Deepgram offers a stable, reliable service with strong performance and transparency, experiencing minor connection issues but maintaining accuracy.
It has a high API uptime; I experienced near-perfect uptime on the public API endpoints.
Full Stack Developer at a university with 10,001+ employees
I have not faced any outages or service failures.
Gestor De Alfeiras
AssemblyAI is quite stable for us.
Software Engineer at Next Generation Innovation L.L.C
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 struggles with speaker identification, accent handling, and multilingual support, facing upload challenges, pricing, and documentation issues.
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

AssemblyAI's pricing is cost-effective and flexible, with no upfront fees, supported by a pay-as-you-go model.
Deepgram offers customizable, competitive pricing for enterprises, promoting efficiency and scalability to meet diverse transcription needs cost-effectively.
There are no licensing fees, setup costs, or long-term contract requirements.
Full Stack Developer at a university with 10,001+ employees
My competitor Deepgram offers lower cost but does not support my native language.
AI Trainee at St John College of Engineering and Management
Regarding my experience with pricing, setup cost, and licensing, I would like to know if it can be reduced somehow.
Senior Software Engineer at Varaha Systems
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 excels in accurate transcription and language support, enhancing productivity and satisfaction with efficient, cost-effective, real-time solutions.
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
Usage increased by 300%.
Gestor De Alfeiras
The stream support helped me in an AI interview platform where a candidate speaks, and I see the live transcription of their answers, which is helpful for candidates to identify if their words are correctly captured.
AI Trainee at St John College of Engineering and Management
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
2nd
Average Rating
8.6
Reviews Sentiment
5.4
Number of Reviews
16
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 (3rd), AI Customer Support (10th), AI Sales & Marketing (9th), AI Scheduling & Coordination (3rd)
 

Mindshare comparison

As of August 2026, in the Speech-To-Text Services category, the mindshare of AssemblyAI is 6.7%, down from 8.2% compared to the previous year. The mindshare of Deepgram is 14.0%, down from 18.3% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Speech-To-Text Services Mindshare Distribution
ProductMindshare (%)
Deepgram14.0%
AssemblyAI6.7%
Other79.3%
Speech-To-Text Services
 

Featured Reviews

Leen Batta - PeerSpot reviewer
Full Stack Developer at a university with 10,001+ employees
Automated workflows have transformed classroom videos into instant interactive study content
While AssemblyAI performs exceptionally well, there are a few areas where the developer experience could be further improved. First, regarding native video file support, currently, developers must write custom back-end logic to extract the audio track from video files locally before uploading. If AssemblyAI supported direct native video uploads and handled the audio extraction internally on their servers, it would simplify our back-end architecture. Native real-time status updates could also be improved because while the API is highly stable, writing custom asynchronous polling loops to check transcription status adds boilerplate code. Lastly, the queue latency for micro-files could be optimized because we noticed some initial queue or warm-up latency when transcribing very short audio files under one minute.
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
35%
Outsourcing Company
11%
Comms Service Provider
9%
Wholesaler/Distributor
9%
Construction Company
10%
Educational Organization
9%
Financial Services Firm
8%
University
8%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business11
Midsize Enterprise4
Large Enterprise7
By reviewers
Company SizeCount
Small Business9
Midsize Enterprise1
Large Enterprise1
 

Questions from the Community

What is your experience regarding pricing and costs for AssemblyAI?
Regarding my experience with pricing, setup cost, and licensing, I would like to know if it can be reduced somehow, but apart from that, licensing is good enough for us.
What needs improvement with AssemblyAI?
AssemblyAI can be improved in several areas. I don't remember if AssemblyAI had a webhook, but if they have one, that's beneficial. The biggest improvement I think was the lack of background sound....
What is your primary use case for AssemblyAI?
My main use case for AssemblyAI was for a voice-based calling system that we created. A specific example of how I used AssemblyAI in my voice-based calling system is that it was used for the text-t...
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 ...
 

Overview

Find out what your peers are saying about AssemblyAI vs. Deepgram and other solutions. Updated: June 2026.
908,800 professionals have used our research since 2012.