Sold by: AssemblyAI
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AssemblyAI builds AI systems that can understand human speech with superhuman abilities. Starting building with $50 in usage credits during your 90-day free trial. Cancel any time. After your trial ends, you will automatically be enrolled into an Assembly AI pay-as-you-go plan. Request a private offer for discounted pricing based on your usage profile.
Sold by: AssemblyAI
Overview
AssemblyAI offers Speech AI models via an API that product teams and developers can use to build powerful AI solutions based on voice data. Thousands of developers build on AssemblyAI's Speech AI models every day to run Speech-to-Text on multilingual speech, and harness the power of Large Language Models to extract the full value from that voice data - including answering questions from voice data, generating content, and extracting metadata in seconds. AssemblyAI offers async transcription, with most audio files completing in well under 45 seconds regardless of audio duration, as well as real-time transcription with high accuracy and <600 ms of latency.
AssemblyAI gives you access to state-of-the-art Speech AI models and capabilities for real-world use cases, so you can build smarter applications in a fraction of the time. Models and features include:
- Speech recognition
- Speaker diarization
- Auto punctuation and casing
- Auto language detection
- Summarization
- Content moderation
- Sentiment analysis
- Auto highlights
- PII redaction
- Topic detection (IAB classification)
- Entity detection
- Auto chapters
- Custom spelling
- Custom vocabulary
- Dual channel transcription
- Export SRT or VTT caption files
- Filler word filtering
- Profanity filtering
In addition, LeMUR, which allows users to leverage the capabilities of Large Language Models, can quickly process audio transcripts for single or multiple audio files for tasks like summarization, question & answer, and AI coaching feedback.
Our Speech AI products support 33 different audio and video file types and 99+ languages. Our models are used by thousands of breakthrough startups and dozens of global enterprises for mission-critical workloads.
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Highlights
- Unparalleled Human-Level Accuracy: Our multilingual speech recognition AI models deliver industry-leading performance with the lowest word error rates on the market, outperforming competitors by over 60% when recognizing challenging content like rare words and proper nouns. Trusted by more than 3,000 innovative companies, including Zoom, our platform provides the foundation for mission-critical speech applications at scale.
- Built for enterprise-grade performance, our APIs deliver unmatched scalability for high-concurrency applications. Security is embedded with SOC 2 Type 2, PCI DSS, and GDPR compliance. For healthcare applications, AssemblyAI offers Business Associate Agreements (BAAs). Choose flexible hosting options in both US and EU regions.
- Comprehensive Audio Intelligence Suite: Our advanced models summarize conversations, identify speakers through diarization, analyze sentiment, moderate content, automatically redact PII, and much more, all in a single platform. Our LeMUR framework seamlessly connects spoken data with large language models, enabling unlimited possibilities for voice-powered applications.
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Dimension | Description | Cost/month |
|---|---|---|
Pay As You Go | State-of-the-art production-ready AI models | $0.00 |
Dimension | Cost/unit |
|---|---|
Async Transcription (core) | $0.37 |
Nano Speech-to-Text (core) | $0.12 |
Real-Time Transcription (core) | $0.47 |
Auto Chapters (Audio Intelligence) | $0.08 |
Content Moderation (Audio Intelligence) | $0.15 |
Entity Detection (Audio Intelligence) | $0.08 |
Key Phrases (Auto Highlights) | $0.01 |
PII Redaction (Audio Intelligence) | $0.08 |
PII Audio Redaction (Audio Intelligence) | $0.05 |
Sentiment Analysis (Audio Intelligence) | $0.02 |
Vendor refund policy
All fees are non-refundable and non-cancellable except as required by law.
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Support
Vendor support
Support is available via chat and email 24/7. support@assemblyai.com
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AWS Support is a one-on-one, fast-response support channel that is staffed 24x7x365 with experienced and technical support engineers. The service helps customers of all sizes and technical abilities to successfully utilize the products and features provided by Amazon Web Services.
Customer reviews
Market Research
A cutting edge speech to text service
Reviewed on Apr 14, 2025
Review provided by G2
What do you like best about the product?
There were 2 things we were looking for when evaluating speech to text APIs:
1) Quality of the speech to text (the most important thing)
2) Speed of the speech to text
3) Documentation / ease of use.
And after using this service for a few months now, AssemblyAI knocks all 3 out of the park.
1) Quality of the speech to text (the most important thing)
2) Speed of the speech to text
3) Documentation / ease of use.
And after using this service for a few months now, AssemblyAI knocks all 3 out of the park.
What do you dislike about the product?
The one thing we are having slight issues with is speaker diarization with more than 10 speakers. Honestly, it's a bit of an edge case, but something it doesn't do great with all the time. Anything under that though hasn't been an issue, and that's the vast majority of our use case
What problems is the product solving and how is that benefiting you?
It creates transcripts for video interviews we conduct on our site.
Leave a comment0 comments
Mert A.
Excellent quality transcribing
Reviewed on Apr 13, 2025
Review provided by G2
What do you like best about the product?
The quality of text it produces even from low quality videos with many speakers and in non-English languages and the ability to accurately identify speakers.
What do you dislike about the product?
The price is kind of high per hour of transcription, can be costly for long videos.
What problems is the product solving and how is that benefiting you?
Clear, accurate transcribing with punctuations and semantic order. Identifying speakers.
Financial Services
Works well
Reviewed on Apr 11, 2025
Review provided by G2
What do you like best about the product?
It works well and is pretty accurate in usage. Using LeMUR summaries is great and works well but needs a defined prompt based on the use case. Can return multiple formats which is great. LeMUR responses return fairly quick and are easy to set up.
What do you dislike about the product?
Takes a moment to start up and sometimes punctuation could be better, it often breaks sentences up into smaller bits.
Setting up websockets for streaming is quite difficult due to many parts.
Setting up websockets for streaming is quite difficult due to many parts.
What problems is the product solving and how is that benefiting you?
In our use case, it allows our financial advisers to have a natural conversation with a client and transcribe the whole thing. With lemur summaries we can prompt to answer specific information from the meeting.
Mental Health Care
Best in class speech transcription
Reviewed on Apr 11, 2025
Review provided by G2
What do you like best about the product?
AssemblyAI's transcription service is easy to setup and use, while being extremely stable for month.
What do you dislike about the product?
Nothing comes to mind. I would like more regular information how it compares to competitors as this is a fast moving market.
What problems is the product solving and how is that benefiting you?
Transcription of video calls
Giorgio S.
Best-in-Class Speech-to-Text Solution
Reviewed on Apr 10, 2025
Review provided by G2
What do you like best about the product?
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.
What do you dislike about the product?
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.
What problems is the product 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.