AssemblyAI is an innovative API platform dedicated to providing robust AI models for speech recognition and transcription, speaker detection, and speech summarization. Well-regarded for its state-of-the-art AI technology and Conformer-2 model which makes up to 43% fewer errors on noisy data, AssemblyAI operates on a secure and scalable API and is trusted by over 90,000 developers worldwide.

Features such as speaker labels, word-level timestamps, profanity filtering, and custom vocabulary make this an ideal choice for understanding human speech in real-world applications. Moreover, the API offers unparalleled advanced features like sentiment detection, content moderation, and even personal information redaction using their distinctive Audio Intelligence models. They have an additional feature named LeMUR that allows developers to build Language Model-powered apps on voice data.

Known for processing terabytes of data daily with over 99.9% uptime and SOC 2 Type 2 compliance, AssemblyAI also boasts easy integration, with users able to get started with the API in seconds. Many reputable enterprises have built and improved their systems using AssemblyAI, lauding its superior accuracy, ease of use, and excellent developer support.


  • Access superhuman AI models for speech recognition, automatic transcription, speech summarization, and more
  • Develop AI applications with voice data for real-world applications
  • Trusted by over 90,000 developers worldwide
  • Features state-of-the-art AI model for speech recognition (Conformer-2) making up to 43% fewer errors on noisy data
  • API includes speaker labels, word-level timestamps, profanity filtering, custom vocabulary, and many more features
  • Offers Audio Intelligence models for tasks like sentiment detection, content moderation, PII redaction and more
  • Enables creation of LLM-powered apps on voice data through LeMUR, their new framework
  • API processes terabytes of audio data daily with over 99.9% uptime and success and is SOC 2 Type 2 compliant
  • Effortlessly transcribe audio files, video files, and live speech into text with Core Transcription feature
  • Comprehensive API for interpreting your audio for business and personal workflows
  • Try their API with no code and get started in seconds


  • AssemblyAI offers a freetrial with 5 hours of transcription per month
  • With AssemblyAI, you only pay for what you use - you'll always know what you'll pay
  • Besides Core Transcription, services such as Real-time Transcription, Audio Intelligence and LeMUR are available, each with their own pricing
  • Pricing can be estimated using their pricing calculator depending on your estimated input size, output size, and chosen model
  • Paid plans for Core Transcription start at $0.025 per minute of transcription
  • If you have a large volume of audio and video content, you may qualify for a volume discount
  • Additional support and bespoke use cases are offered for businesses with large volume needs under the Enterprise plan
  • AssemblyAI supports over 16 languages including Global English and all of its accents
  • They also provide additional services like Summarization and Premier Support with their own different pricing
  • Plans are available for startups, enterprises, and developers

Popular Use Cases

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