AssemblyAI

freemium · from $0.15/mo

Enterprise speech-to-text and voice understanding platform with advanced AI models

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API

AI Audio AI Transcription

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About AssemblyAI

AssemblyAI is an enterprise-grade speech-to-text and voice understanding platform that provides developers with accurate transcription, speaker diarization, and voice AI capabilities. It offers Universal-3 Pro, a promptable speech language model with industry-leading word accuracy rates (94.07%), along with real-time streaming transcription, formatted transcripts for LLM integration, and compliance-ready features like PII redaction and HIPAA support. The platform serves over 200,000 developers and powers voice AI applications for Fortune 500 companies and startups.

Key Features

Speech-to-text transcription
Real-time streaming transcription
Speaker diarization and labeling
Context-aware prompting
Audio tagging and event detection
Disfluency preservation
Code-switching detection
PII redaction and profanity filtering
LLM integration
HIPAA compliance and BAA support

AI Models

Universal-3 Pro

Use Cases

Speech-to-text transcriptionConversation intelligenceMedical transcriptionContact center analyticsVoice agentsAI note-taking applicationsCode-switching and multilingual audio processing