AssemblyAI's logo. A blue illustration on the left, and the word Assembly A I on the right. The illustration is the letter V inverted. Why? I don't know either. Looks cool though.
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Transcribe and understand audio with a single AI-powered API

Automatically convert audio and video files and live audio streams to text with AssemblyAI's Speech-to-Text APIs. Do more with Audio Intelligence - summarization, content moderation, topic detection, and more. Powered by cutting-edge AI models.

We're loved by companies of all sizes

From startups to Fortune 500 companies, businesses of all sizes use AssemblyAI's API everyday.

AssemblyAI transcribes our customers phone calls. Solid transcription accuracy (we tested a number of competitors, and they were the best) with great customer service. The team goes above and beyond.

Bradley Blaser/Co-Founder & CEO, Liine

AssemblyAI is so great because you can make an API request with a media file, and boom, you get a nice, intuitive JSON formatted transcript response. You can also add parameters to get speakers, topic analysis, personal information detection, and it's just a matter of changing the payload in the first API request.

@rememberlenny/Hacker News

Built for developers

Everything developers need to quickly build exciting new products

From in-depth tutorials, to detailed changelogs, to comprehensive documentation, AssemblyAI is focused on providing developers a great experience every step of the way.

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Product overview

Detailed walkthroughs

Video tutorials

Industry updates

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Version updates

New feature releases

Bug fixes

Product improvements

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Analyze audio with our state-of-the-art models

From core speech-to-text conversion to sentiment analysis, our simple API offers a full suite of solutions catered to all your business speech-to-text needs.

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Core Transcription

Async transcription

Real-time transcription

Speaker labels

International languages

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Audio Intelligence


Sentiment analysis

PII redaction

Entity detection

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Trusted by 6,000+ businesses

AssemblyAI for startups
We work with startups of all sizes - from early-stage startups to scale-ups - by providing cost-efficient speech-to-text solutions.
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AssemblyAI for enterprises
We're built for scale. We process millions of audio files every day for hundreds of customers, including dozens of Fortune 500 enterprises.
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AssemblyAI for developers
We provide comprehensive support to developers through our in-depth tutorials, detailed documentation, and changelog.
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AssemblyAI in the real world

Innovative businesses from a wide range of industries rely on AssemblyAI's speech-to-text capabilities to quickly ship exciting new products and applications to their users.

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All with one simple API

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