API AI Transcription & Speech Summary Service
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What products does AssemblyAI offer for voice AI?
AssemblyAI provides three primary offerings to build voice AI applications:
- Speech-to-Text: transcription of prerecorded audio with high accuracy
- Streaming Speech-to-Text: ultra-low-latency transcription for real-time workflows
- Speech Understanding: deeper audio intelligence to unlock insights (including diarization, formatting, and language-related capabilities)
How accurate are AssemblyAI's speech-to-text models?
AssemblyAI emphasizes industry-leading accuracy built on advanced, continuously improved models. The platform is designed to handle a variety of audio use cases and to deliver reliable results across different scenarios, with ongoing updates across model generations.
What capabilities does AssemblyAI offer beyond transcription?
Beyond transcription, AssemblyAI provides a suite of speech-understanding features, including:
- Speaker diarization (identifying and separating speakers)
- Automatic punctuation and casing
- Automatic language detection and multilingual support
- PII redaction
- Topic detection (IAB classification) and entity detection
- Auto chapters
- Summarization, content moderation, and sentiment analysis
- Auto highlights and other advanced insights
How scalable is AssemblyAI in terms of usage and throughput?
AssemblyAI is designed for high-scale usage, with:
- 600M+ inference calls per month
- Over 840M API calls per month
- Over 40 terabytes of audio processed daily
- Pay-as-you-use pricing and the ability to scale to millions of hours without contracts or throttles
Is there a no-code Playground to test the API?
Yes. AssemblyAI offers a no-code Playground to let you test and experiment with the API without writing code.
How do I get started and obtain an API key?
To begin:
- Click the "Try the API" button (top-right on the site)
- Enter your email to receive your unique API key
- Accept AssemblyAI's Terms of Service
- If interested, you can also apply for early access to the LeMUR API by submitting the form available on the site
Do you offer enterprise or startup programs?
Yes. AssemblyAI provides options tailored for different scales and needs, including enterprise and startup-focused offerings (e.g., For Enterprise, For Startups, For Conversation Intelligence, For Voice Agents, and more). Details are available through the site’s enterprise resources.
Does AssemblyAI support language detection and multilingual transcription?
Yes. AssemblyAI supports automatic language detection and multilingual transcription to handle content in multiple languages accurately.
How many file types does AssemblyAI support?
Core transcription supports a wide range of inputs, including 49 different audio and video file types.
What security and privacy resources are available?
AssemblyAI provides security and privacy resources such as:
- Trust Center
- Subprocessors information
- Privacy Policy
- Data privacy options (including opt-out and related notices)
What pricing options exist?
AssemblyAI offers tiered pricing concepts including Core Transcription, Audio Intelligence, and Enterprise. There is a free trial option to try the API. Pricing is described in terms of usage and plans, with no long-term contracts or throttling for standard usage.
Where can I find developer documentation and API references?
Developer documentation and API resources are available on AssemblyAI's site, including API Reference, Cookbooks, and Changelog.
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