AssemblyAI offers advanced AI models for speech transcription and understanding, featuring accurate speech-to-text capabilities, real-time streaming, and audio intelligence. Their API is developer-friendly, with high accuracy rates and low latency, making it suitable for various applications. The platform emphasizes security, scalability, and continuous innovation, catering to over 200,000 customers with a strong focus on collaboration and support.
AssemblyAI
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.
Best in class
We lead with accuracy
Our speech-to-text models are the most accurate on the market with top performance rankings across major industry benchmarks.
The highest accuracy rates—up to 95%
Up to 30% less hallucinations than other leaders
Low latency—63 minutes converts in 35 seconds
Capabilities
Built beyond transcription
Groundbreaking audio intelligence lets you dream bigger, build better, and transform words into meaningful ideas, insights, and opportunities.
Fully-featured Speech Understanding models
Built by top research leaders, scientists, and engineers
Rapid innovations that help you outpace the industry
Build-ready
Trusted by developers
From intuitive API experiences to detailed technical tutorials, developers choose AssemblyAI because we build with them in mind.
SDKs that perform, improve, and scale—reliably
Clear and comprehensive developer documentation
Implement with just 5 lines of code—update with zero
An illustration on a blue background showing code for AssemblyAI's transcription in multiple languages including Python, Typescript, Go, Java and Ruby
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
Our Speech AI experts are solving top industry challenges and pioneering new possibilities for world-class voice data products.
Always advancing
We keep you on the cutting edge with weekly features and updates that ship out ready for production without requiring more work from your team.
Priced to scale
Cost won’t prevent you from building winning products. We keep pricing scalable with payment options and custom volume discounts.
Security focused
We keep your data private, safe, and secure with our security-first practices and comprehensive enterprise-grade protections.
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."
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I’ve tested many speech-to-text APIs (Google, AWS, IBM) and AssemblyAI consistently wins. Highly recommend for devs.
Nico R.
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.
report
Universal-1 surpasses industry milestones
Our latest multilingual speech model is trained on over 12.5M hours of audio data and ranks industry best across English, Spanish, German, and French.
youtube
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.
Blog
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.
Blog
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.
Try our API for freeContact sales
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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 }
]
}