AssemblyAI
Speech-to-text APIs and audio intelligence for developers
Introduction
AssemblyAI offers speech recognition models through an API for both recorded and streaming audio. Add-on models cover speaker labels, sentiment analysis, PII redaction and content moderation, and a no-code playground lets you try them first.
- Added on
- Nov 2, 2026
- Website
- www.assemblyai.com
- Pricing model
- Freemium
- Company
- AssemblyAI, Inc.
Product information
What is AssemblyAI?
AssemblyAI provides ASR and language models that transcribe speech and extract insights from voice data, aimed at startups and enterprises building voice products.
How to use AssemblyAI?
Send pre-recorded audio to the API for transcription, or use low-latency streaming speech-to-text for voice agents. Audio intelligence models can then analyze the results, and the no-code playground is available for testing.
Core features of AssemblyAI
- Speech-to-text
- Streaming speech-to-text
- Speech understanding
- Speaker diarization
- Sentiment analysis
- PII redaction
Use cases of AssemblyAI
- 1Conversation intelligence
- 2Voice agents
- 3Customer support analysis
- 4Summarizing meeting transcripts
Frequently asked questions about AssemblyAI
What services does AssemblyAI offer?+
Speech-to-text, streaming speech-to-text and speech understanding, including diarization, sentiment analysis, PII redaction and content moderation.
Can I try AssemblyAI for free?+
Yes. There is a free tier with $50 in credits, plus a no-code playground.
How is AssemblyAI used?+
Developers call its API to transcribe recorded audio, build streaming voice workflows and run audio-intelligence analysis.
Which category is AssemblyAI in?+
AssemblyAI is listed under AI Transcription.