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AssemblyAI - Speech to Text API Reviews & Product Details

AssemblyAI - Speech to Text API Overview

What is AssemblyAI - Speech to Text API?

AssemblyAI is the leading Speech AI platform for product and development teams from early-stage startups to global enterprises are building with voice data powered by AssemblyAI. Companies like CallRail, Fireflies.ai, and EchoAI rely on AssemblyAI’s speech models to unlock the full potential of their audio data through powerful Speech Recognition, Speech Understanding, and Speech-to-Text capabilities. Tailored to for builders, developers, and innovators who want to turn voice into a product advantage, AssemblyAI gives you the tools to: 🎙️ Process real-time or pre-recorded audio with unmatched precision 🧠 Unlock high-value insights with Emotion Detection, Intent Recognition, Sentiment Analysis, Named Entity Recognition, and Summarization 🌍 Transcribe audio in over 40+ languages and dialects 🔐 Ensure privacy and security with enterprise-grade compliance and on-prem deployment options 💡 Continuously access cutting-edge innovation with model updates released regularly 🚀 Scale with confidence using robust infrastructure and modern developer tooling AssemblyAI’s API-first platform makes it simple to integrate production-ready Speech AI into your app, product, or workflow—with clean docs, usage-based pricing, and support that actually supports you. Designed to scale, AssemblyAI brings best-in-class voice capabilities into products and workflows for AI-powered voice assistants, automated note-takers, or real-time analytics on customer calls. AssemblyAI helps you ship faster, scale smarter, and stay ahead of the curve with battle-tested, research-backed models that get better over time. 👉Start building with $50 in free credits and experience the difference of speech intelligence that actually delivers at assemblyai.com.

AssemblyAI - Speech to Text API Details
Product Website
Languages Supported
German, English, Finnish, French, Hindi, Italian, Japanese, Korean, Dutch, Polish, Portuguese, Russian, Spanish, Turkish, Ukrainian, Vietnamese, Chinese (Traditional)
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Product Description

We're a team of engineers and researchers, and we're working to give developers and global companies an alternative to big tech companies when it comes to advanced AI solutions.

How do you position yourself against your competitors?

- Industry leading models that consistently rank highest in benchmark reports based on publicly available, verified data

- Most advanced capabilities and features to go beyond transcription and provide full AI capabilities

- Built by a team of the top Speech AI research and development experts who continue to push the boundaries of what’s possible

- Constant shipping and innovation, with new developments in production daily

- Exceptional developer and customer experience


Seller

AssemblyAI

Description

AssemblyAI is a leading provider of audio intelligence technology, specializing in automatic speech recognition (ASR) and transcription services. Their platform offers developers and businesses powerful APIs to convert audio to text with high accuracy, enabling applications in various fields such as content creation, customer service, and accessibility. With features like real-time transcription, speaker identification, and sentiment analysis, AssemblyAI aims to enhance the way organizations process and utilize audio data. For more information, visit their website at https://www.assemblyai.com.

Overview Provided by:

AssemblyAI - Speech to Text API Integrations

(14)
Verified by AssemblyAI - Speech to Text API

Recent AssemblyAI - Speech to Text API Reviews

TC
Thales C.Small-Business (50 or fewer emp.)
5.0 out of 5
"Easy and accurate way to implement transcription in your software"
It’s easy to implement and delivers great value for money. The way the API is designed is excellent!
Nischay B.
NB
Nischay B.Small-Business (50 or fewer emp.)
4.0 out of 5
"Great tool, better than most available out there."
The ability to identify speakers and get a detailed time stamp based division.
Emanuele D.
ED
Emanuele D.Small-Business (50 or fewer emp.)
5.0 out of 5
"Excellent advanced tool, but simple to use"
...it is a very comprehensive tool that allows not only for a very accurate transcription of the text, but also includes punctuation. It also has v...

AssemblyAI - Speech to Text API Media

AssemblyAI - Speech to Text API Demo - Streaming Speech-to-text
Power real-time voice experiences with ultra-fast and ultra-accurate speech-to-text, unlimited concurrency, and pricing that scales with you.
AssemblyAI - Speech to Text API Demo - Speech-to-text
Experience industry-leading speech-to-text accuracy with Speech AI models on the cutting-edge of AI research, accessible through a simple API.
Siro reduced customer complaints and support tickets by 90% after switching to AssemblyAI's Universal speech recognition model.
Play AssemblyAI - Speech to Text API Video
Siro reduced customer complaints and support tickets by 90% after switching to AssemblyAI's Universal speech recognition model.
By leveraging AssemblyAI's transcription capabilities, VEED converts videos into editable text, making
Play AssemblyAI - Speech to Text API Video
By leveraging AssemblyAI's transcription capabilities, VEED converts videos into editable text, making "video way more malleable" and significantly reducing barriers to producing professional content.
Supernormal, an AI-powered meeting platform, doubled their free-to-paid conversion rate after integrating AssemblyAI's advanced speech-to-text technology.
Play AssemblyAI - Speech to Text API Video
Supernormal, an AI-powered meeting platform, doubled their free-to-paid conversion rate after integrating AssemblyAI's advanced speech-to-text technology.
CallRail improved its call transcription accuracy by up to 23% and doubled the number of customers using its Conversation Intelligence product.
Play AssemblyAI - Speech to Text API Video
CallRail improved its call transcription accuracy by up to 23% and doubled the number of customers using its Conversation Intelligence product.

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67 AssemblyAI - Speech to Text API Reviews

4.6 out of 5
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67 AssemblyAI - Speech to Text API Reviews
4.6 out of 5
67 AssemblyAI - Speech to Text API Reviews
4.6 out of 5

AssemblyAI - Speech to Text API Pros and Cons

How are these determined?Information
Pros and Cons are compiled from review feedback and grouped into themes to provide an easy-to-understand summary of user reviews.
Pros
Cons
G2 reviews are authentic and verified.
Павел .
П
Xamarin Developer
Small-Business(50 or fewer emp.)
Validated Reviewer
Verified Current User
Review source: G2 invite on behalf of seller
Incentivized Review
What do you like best about AssemblyAI - Speech to Text API?

I'm impressed with AssemblyAI's transcription service due to its reasonable pricing. For transcribing 243 hours of audio, I paid only $68. In comparison, Google's Chirp_2 model cost $47 for just 35 hours, which would have totaled $326 for the same 243 hours.

Additional benefits include the ability to separate text by different speakers (English only) and automatic language detection. The API is straightforward to use and was easy to integrate into both Flutter and .NET Core Web applications.

Overall, I'm satisfied with the service and plan to continue using it. Review collected by and hosted on G2.com.

What do you dislike about AssemblyAI - Speech to Text API?

There are some aspects I'd like to see improved. The API response contains too many unnecessary fields that I don't need, which increases loading times. I would also appreciate faster speech-to-text processing speeds and an increase in the maximum duration limit beyond the current 10-hour restriction. Additionally, the slam-1 model only works with English text, and I would like to see this model become internationalized to support multiple languages. Review collected by and hosted on G2.com.

What problems is AssemblyAI - Speech to Text API solving and how is that benefiting you?

AssemblyAI enables me to efficiently convert large volumes of audio data into text, which is highly beneficial for both educational purposes and note-taking. Review collected by and hosted on G2.com.

Rodrigo F.
RF
Consultant
Small-Business(50 or fewer emp.)
Validated Reviewer
Verified Current User
Review source: G2 invite on behalf of seller
Incentivized Review
Rating Updated ()
What do you like best about AssemblyAI - Speech to Text API?

AssemblyAI is seriously impressive. Before I found it, I tried out Google Cloud, Whisper, and some open-source tools for diarization. I even gave Read.ai a shot, but honestly, none of them gave me the results I was looking for.

Then I saw someone mention AssemblyAI on Reddit, and I decided to give it a try. I’m so glad I did—their transcription and diarization are on another level. I barely ever need to edit the transcripts, which is rare with these kinds of tools.

The pricing is super reasonable for what you get, and the API is really flexible. I’ve been able to build my own workflows to transcribe meetings, interviews, and videos without any hassle. I use it pretty much every day for transcribing meetings I record on my computer, and I save everything in Markdown format.

If you’re looking for a solid, reliable transcription service that just works, I can’t recommend AssemblyAI enough. Review collected by and hosted on G2.com.

What do you dislike about AssemblyAI - Speech to Text API?

It's not that I don't like but I think there is high bareer for non-techs to access the serviece. I know tht they ahve a playground, but it's still scary for peop,e who want to use the service but see the. Some friends who see my workflow wants to mimic but stop when they see the api nterface. The docs are very well detailed, but there are barreres for adoption for certain customer segments still.

Another thing that I would like would to store the cluster of voicers that are recorded I would like the odel to automatically name them. I think this would be too complicated and probably there's privacy concerns involved. But it would be a quality of life approach. But I guess this is a niche need instead of something the custoemr base would be interested at Review collected by and hosted on G2.com.

What problems is AssemblyAI - Speech to Text API solving and how is that benefiting you?

AssemblyAI is solving the problem of turning audio into accurate, structured text—especially with speaker diarization and high transcription quality. It saves me a huge amount of time. I use it to transcribe meetings, interviews, and video content recorded locally on my computer, and the results are so good I rarely need to edit them. Having access to a reliable API also means I can fully automate my workflow and store the transcripts in Markdown, exactly the way I need. It’s made transcription effortless and consistent, which is a big deal for someone who works with audio content daily. Review collected by and hosted on G2.com.

Timur M.
TM
Developer
Small-Business(50 or fewer emp.)
Validated Reviewer
Verified Current User
Review source: G2 invite on behalf of seller
Incentivized Review
What do you like best about AssemblyAI - Speech to Text API?

We recently started using the AssaemblyAI api to transcribe videos from our educational channels. The API works quickly and reliably. So far we have never encountered any limitations of the platform, although our videos are quite large. The quality of recognition is very high, the price is about the same as with OpenAI analogs, but there is no limit of 25 minutes per video fragment. Review collected by and hosted on G2.com.

What do you dislike about AssemblyAI - Speech to Text API?

I wish the price was even lower, we have so many more videos to process. Also it is not quite clear how formatting into paragraphs works, according to the api we get exactly the text without paragraphs, although in the version available for free through the interface, the recognized text is already formatted Review collected by and hosted on G2.com.

What problems is AssemblyAI - Speech to Text API solving and how is that benefiting you?

We are using the AssaemblyAI api to transcribe videos from our educational channels to build RAG system Review collected by and hosted on G2.com.

Andrea R.
AR
Manager
Small-Business(50 or fewer emp.)
Validated Reviewer
Verified Current User
Review source: G2 invite on behalf of seller
Incentivized Review
What do you like best about AssemblyAI - Speech to Text API?

AssemblyAI impresses with its high transcription quality, even when dealing with messy or low-quality audio inputs. The diarization capabilities are particularly strong—accurately distinguishing between speakers in less-than-perfect recordings. The API suite is fast, well-documented, and returns a rich, detailed output format that makes post-processing straightforward and powerful. I also found the Word Boost feature especially helpful: being able to prioritize tricky or uncommon words significantly improves recognition accuracy in niche use cases. Overall, it’s a developer-friendly platform that balances precision with flexibility. Review collected by and hosted on G2.com.

What do you dislike about AssemblyAI - Speech to Text API?

Honestly, there’s little to complain about. The pricing model is reasonable for the level of quality and features provided, and I haven’t encountered any significant drawbacks in my usage Review collected by and hosted on G2.com.

What problems is AssemblyAI - Speech to Text API solving and how is that benefiting you?

Transcription and diarization of complex audios Review collected by and hosted on G2.com.

NH
Head of technology and marketing
Small-Business(50 or fewer emp.)
More Options
Validated Reviewer
Verified Current User
Review source: G2 invite on behalf of seller
Incentivized Review
What do you like best about AssemblyAI - Speech to Text API?

One of the best things about AssemblyAI is how much more affordable and accessible it is compared to many other options on the market. The pricing is straightforward and budget-friendly, which makes it an excellent choice for both small developers and larger teams. Despite the lower cost, the transcription accuracy and feature set remain top-notch. The API is easy to implement, and the documentation is clear and helpful. It’s reliable, fast, and packed with features like speaker diarization and topic detection that are usually reserved for much more expensive platforms. Review collected by and hosted on G2.com.

What do you dislike about AssemblyAI - Speech to Text API?

Currently there are some features not available to the European users but I believe these are in development. Review collected by and hosted on G2.com.

What problems is AssemblyAI - Speech to Text API solving and how is that benefiting you?

We use it to transcribe conversations between brokers and clients, which ensures that key details aren’t missed and can be easily reviewed or referenced later. This is incredibly valuable for our brokers, who can focus on the conversation without needing to take extensive notes, then use the transcriptions to follow up with tailored advice or next steps. Review collected by and hosted on G2.com.

Response from Madison Boyd of AssemblyAI - Speech to Text API

Thank you for your feedback! We are continuously working to expand our features to all users, including those in Europe. We appreciate your patience as we work on further development.

Verified User in Financial Services
UF
Small-Business(50 or fewer emp.)
Validated Reviewer
Verified Current User
Review source: G2 invite on behalf of seller
Incentivized Review
What do you like best about AssemblyAI - Speech to Text API?

It's really great for Spanish specifically and user diarization. Also, it's quick compared to Speechmatics API; it's really slow, so kudos on that also, and it's been really cost-effective. I must have transcribed 800-1000 calls with the free credits, so that's really great. Overall super solid though. Review collected by and hosted on G2.com.

What do you dislike about AssemblyAI - Speech to Text API?

I think the worst part about Assembly has been that the API itself is a bit complicated to work with, since with recordings you've got to make them into links first and then send the links and transcript IDs to a separate endpoint. I can still work with it and have done lots of things, but it would be easier if it was a single API if I'm working with recordings that did this in the background. Review collected by and hosted on G2.com.

What problems is AssemblyAI - Speech to Text API solving and how is that benefiting you?

It is the only API we've found that reliably transcribes some of our more lower quality/foreign accents calls in Spanish with correct dieratization. We haven't found another API that did this well after trying most of the popular API's (e.g. deepgram, speechmatics) Review collected by and hosted on G2.com.

Verified User in Research
UR
Small-Business(50 or fewer emp.)
Validated Reviewer
Verified Current User
Review source: G2 invite on behalf of seller
Incentivized Review
What do you like best about AssemblyAI - Speech to Text API?

I'm an academic- I recently started using Assembly AI for a project I've been interested in doing for years. I just didn't have a good way to generate transcripts off of videos. Thus, I've been using it extensively over the past few weeks. I imagine it will be a case where I use it a lot in brief spurts over the coming months/years.

I reached out with a question about academic use and was surprised by how quickly AAI responded (but, please recognize .edu as a valid work e-mail).

I started working with Assembly AI on the free credits (which is a great way to "test drive"). It took me a while to get things just as I wanted, but once I got there, it has been smooth sailing and largely automated its integration into my research workflow. I've found the transcription quite accurate (this is the standard model, not the fancy new one). Processing time is fast- and everything is readily scriptable. There is rather nice documentation. Review collected by and hosted on G2.com.

What do you dislike about AssemblyAI - Speech to Text API?

I think there are two things I would like to see in the future.

First, I think the documentation is kind of balkanized. It would be nice if it was more streamlined. In my case, this really goes for formatting the output. More sample scripts for the output would be great. This would have made initial implementation a fair bit easier (I'd call it a 5/10 difficulty... and I'd call myself an ok-ish Python user).

Second, I would like to see interruption/overlay detection. I get that might be hard without multiple microphones. For this one, I'm just going to hold out hope for the steady march of progress. Review collected by and hosted on G2.com.

What problems is AssemblyAI - Speech to Text API solving and how is that benefiting you?

In my research, I'm keen to build transcripts for text analysis. I'm dealing with a corpus that isn't written down- it just exists as audio/video recordings. AAI is helping me construct those documents. I've always been excited by my research- but I am REALLY excited by where AAI can help me take it! Review collected by and hosted on G2.com.

Giorgio S.
GS
CEO
Small-Business(50 or fewer emp.)
Validated Reviewer
Verified Current User
Review source: G2 invite on behalf of seller
Incentivized Review
What do you like best about AssemblyAI - Speech to Text API?

The exceptional accuracy, even with challenging audio and technical terminology, combined with their developer-friendly API that integrates seamlessly. Advanced features like speaker diarization and content moderation provide tremendous value beyond basic transcription. Review collected by and hosted on G2.com.

What do you dislike about AssemblyAI - Speech to Text API?

Integration with complex database systems like VertexDB can be challenging and requires additional development effort. The response latency can sometimes be longer than expected, especially when processing large audio files, which can impact real-time applications that require immediate transcription results. Review collected by and hosted on G2.com.

What problems is AssemblyAI - Speech to Text API solving and how is that benefiting you?

AssemblyAI is solving our critical need for accurate and scalable speech-to-text capabilities in our clone platform. By implementing their API, we've eliminated the resource-intensive task of developing our own transcription engine while gaining enterprise-grade accuracy. This has significantly accelerated our development timeline and allowed us to focus on our core platform features while providing users with reliable transcription services for audio content analysis and searchability.RetryClaude can make mistakes. Please double-check responses. Review collected by and hosted on G2.com.

Dave G.
DG
Sr. VP of Restaurant Development
Small-Business(50 or fewer emp.)
Validated Reviewer
Verified Current User
Review source: G2 invite on behalf of seller
Incentivized Review
What do you like best about AssemblyAI - Speech to Text API?

- Easy to configure due to good documentation

- I am not a developer but figured it out

- Integrated into N8N for my automation

- Nano model is very cost effective

- Great speaker detection Review collected by and hosted on G2.com.

What do you dislike about AssemblyAI - Speech to Text API?

- Took a little testing to get my settings correct but good documentation helped

- Works flawlessly once I got off free level, I was throttled before that but understandable due to free account Review collected by and hosted on G2.com.

What problems is AssemblyAI - Speech to Text API solving and how is that benefiting you?

I wanted to have clear speaker identified from my wav files that are recorded in my CRM/ATS. I wanted an automation when i drop a file in a folder to return a transcription to the same folder. N8N and assemblyAI made this possible. Review collected by and hosted on G2.com.

Francesco M.
FM
Frontend developer
Small-Business(50 or fewer emp.)
More Options
Validated Reviewer
Verified Current User
Review source: G2 invite on behalf of seller
Incentivized Review
What do you like best about AssemblyAI - Speech to Text API?

I use AssemblyAI to get transcripts of my podcast episodes, and the accuracy is pretty good.

The timestamp associated with each word allow us to easily make a connection with the podcast audio and jump right where we need.

Customer support has been great. Review collected by and hosted on G2.com.

What do you dislike about AssemblyAI - Speech to Text API?

Nothing to complain.

Sometimes it's a bit tricky when the podcaster say the spelling of the promo code he uses.

For example, if the promocode is SUMMER. I may get S-U-M-M-E-R, which is not easy to work with. But I it's an edge case. Review collected by and hosted on G2.com.

What problems is AssemblyAI - Speech to Text API solving and how is that benefiting you?

Get the podcast episodes transcript, associating each word with a timestamp.

Give lot of insight to what podcasters are saying and how are promoting our promo codes Review collected by and hosted on G2.com.

Response from Madison Boyd of AssemblyAI - Speech to Text API

We're thrilled to hear that our API is providing valuable insights for your podcast episodes. Thank you for sharing your experience with us!