Introducing Universal-2: Our most advanced speech-to-text model capturing the nuance of human speech.Learn more
Transform speech into meaning
Build with the leader in Speech AI to power world-class products with unmatched accuracy, breakthrough speech-to-text models, and profound speech understanding.
Build expertly, effortlessly
Redefine what’s possible with voice data—all on one seamless API that evolves ahead of the industry and handles the heavy lifting.
Speech-to-Text Transcription
Elevate voice outputs with accurate transcriptions and advanced features like speaker diarization and language detection.
Streaming Speech-to-Text
Generate real-time captions, transcripts, and more with high-accuracy, low-latency voice recognition technology.
Speech Understanding
Extract valuable insights you can act on with sophisticated audio-intelligence models and the most advanced LLM capabilities.
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6import assemblyai as aai
transcriber = aai.Transcriber()
transcript = transcriber.transcribe(URL, config)
print(transcript){
"id": "6rlr37h8f4-e310-4e23-bbf3-ea5f347dc684",
"language_code": "en_us",
"status": "completed",
"text": "Runner's knee is a condition characterized by pain behind or around the kneecap...",
"confidence": 0.98122,
"audio_duration": 3200,
"words": [
{ "text": "Runner's", "start": 0, "end": 550, "speaker": "A", "confidence": 0.98113 },
{ "text": "knee", "start": 580, "end": 1130, "speaker": "A", "confidence": 0.95417 }
]
}Industry-leading Speech AI, on a developer-first API
The AI is the limit. Make sure you build on the best.
We lead with accuracy
Built beyond transcription
Trusted by developers
We’re not playing around—but you can
Put our AI models to the test in our no-code playground.
A foundation you can build on
Future-proof your products with superior standards that scale with you.
Research first
Always advancing
Priced to scale
Security focused
200,000+ customers build with AssemblyAI
Learn why they choose us.
Ryan Johnson
Chief Product Officer at CallRail
"Partnering with AssemblyAI has made it easy for us to deliver world-class voice intelligence powered by market-leading speech-to-text technology."
Vedant Maheshwari
CEO at Vidyo
"We have had a phenomenal experience so far. The integration was simple and easy for developers to get started. The accuracy is better than any other tools in the market (and we have tried them all). Highly recommend!"
Tom Lavery
Founder & CEO at Jiminny
"AssemblyAI has a real high-touch personal service. It’s a great partnership—we’re very collaborative and get to test new AI models early. AssemblyAI is really pushing boundaries, helping us create a well-rounded Conversation Intelligence platform."
Alexander Kvamme
Co-founder & CEO at EchoAI
"Works incredibly well out of the box. Allowed us to focus on product instead of infrastructure. As a result, we were able to bring a transformative new product to market in half the time."
I’ve tested many speech-to-text APIs (Google, AWS, IBM) and AssemblyAI consistently wins. Highly recommend for devs.
Developer & Co-founder
Nathan Webb
Product Manager at Aloware
"The accuracy was strong, but the great documentation and unique models like Auto Chapters and Sentiment Analysis is what really won us over."
Learn how Veed.io helps users produce high-quality videos.
We’re shaping the tides of Speech AI
Deep dive into insights, industry breakthroughs, and trending innovations.
Introducing Universal-2
Our most advanced Speech AI model to date captures the complexity of real-world conversations to power best-in-class product experiences.
Assembly Required
A new series featuring candid conversations between AI founders to share insights and learnings about the highs and lows of building a company.
2024 Insights Report
We surveyed over 200 industry leaders to learn how AI is reshaping their product strategy. Learn the strategic movies they’re making and why.
Innovations, education, and technical tutorials
Explore our YouTube channel for weekly videos on the latest AI innovations and tutorials on how to build AI features fast.
AI trends in 2024: Graph Neural Networks
Discover how this cutting-edge technology is powering production applications and may be changing the future of AI.
Top 5 security questions for protected speech products
Learn the top questions developers should be asking API providers to ensure customer data is safeguarded every step of the way.
The code to meaningful voice data
Partner with the leader in Speech AI to build powerful products with breakthrough industry impact.
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6import assemblyai as aai
transcriber = aai.Transcriber()
transcript = transcriber.transcribe(URL, config)
print(transcript){
"id": "6rlr37h8f4-e310-4e23-bbf3-ea5f347dc684",
"language_code": "en_us",
"status": "completed",
"text": "Runner's knee is a condition characterized by pain behind or around the kneecap...",
"confidence": 0.98122,
"audio_duration": 3200,
"words": [
{ "text": "Runner's", "start": 0, "end": 550, "speaker": "A", "confidence": 0.98113 },
{ "text": "knee", "start": 580, "end": 1130, "speaker": "A", "confidence": 0.95417 }
]
}