AssemblyAI is a heavy-duty Speech AI platform providing developers with production-ready APIs for automated transcription, speaker identification, and advanced audio intelligence like sentiment analysis and PII redaction.
AssemblyAI provides a suite of Speech-to-Text models and Audio Intelligence features accessible via a REST API. Its core Universal-1 model is trained on millions of hours of audio data, enabling high accuracy across varying background noise levels and diverse accents. Beyond simple transcription, the platform offers 'LeMieux'—a specialized LLM for speech—which allows users to perform tasks like automated summarization, topic detection, and content moderation directly on audio streams. It integrates seamlessly with Python, JavaScript, and Go environments, making it a preferred choice for building enterprise-grade voice analytics and meeting assistants.
Developers, AI researchers, Businesses with audio data
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50,000+
2017
San Francisco, CA
Free
Access to all APIs for trying out the service. Includes limited hours.
Free
Starter
More hours and access to advanced features for growing projects.
$15/mo
Enterprise
Custom pricing, dedicated support, and higher volume limits for large-scale operations.
Custom
Popular alternative with overlapping features and a strong user base.
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