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AssemblyAI offers advanced AI models for transcribing and understanding speech. Here's a detailed summary of its features, benefits, costs, and key functionalities:

Key Features

  1. Core Transcription: Provides speech-to-text services with over 90% accuracy, supporting 17+ languages and trained on 1.1 million hours of data. Features include speech recognition, dual-channel transcription, speaker diarization, export of caption files, auto punctuation and casing, filler word filtering, auto language detection, profanity filtering, custom spelling, word search, and custom vocabulary​​.
  • Real-time Transcription: Offers real-time transcription services with high accuracy and low latency​​.
  • Audio Intelligence: Includes features like auto chapters, content moderation, entity detection, key phrases, personally identifiable information (PII) redaction, sentiment analysis, summarization, and topic detection​​.
  • LeMUR (Large Model for Understanding and Reasoning): Provides an easy way to build Large Language Model (LLM) apps on voice data, with features for question & answer, action items, and custom summary​​.


  • Core Transcription: Priced at $0.650016 per second per hour​​.
  • Real-time Transcription: Costs $0.75024 per second per hour​​.
  • Audio Intelligence Models: Prices vary for different features, e.g., $0.30/hour for auto chapters and $0.12/hour for sentiment analysis​​.
  • LeMUR: The default model is priced at $0.017 per 1K tokens for input and $0.049 per 1K tokens for output, and the basic model is priced at $0.004 per 1K tokens for input and $0.008 per 1K tokens for output​​.
  • Enterprise Solutions: Custom pricing for businesses with large volume needs and additional support requirements​​.


  • Multilingual Support: Supports over 16 languages, including various accents of English​​.
  • Accuracy and Efficiency: Offers high transcription accuracy and real-time transcription capabilities, making it suitable for various professional needs.
  • Diverse Applications: Useful for a wide range of applications like content moderation, summarization, and sentiment analysis.
  • Scalability: Suitable for both individual and enterprise-level needs with customizable solutions.

Additional Information

  • Free Trial and Discounts: Provides a free trial on a limited basis and offers volume discounts for large-scale use​​.


AssemblyAi is a versatile and powerful tool for businesses and individuals needing efficient and accurate speech transcription and analysis. Its advanced AI models, capable of handling a wide range of languages and offering a variety of features, make it suitable for diverse applications from real-time transcription to in-depth audio analysis and LLM app development. With scalable pricing and a free trial, it caters to a broad spectrum of users, from startups to large enterprises.


  • Freemium
  • Audio Creation