AssemblyAI
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Introduction
AssemblyAI provides industry-leading Speech AI models to transcribe speech to text and extract insights from voice data.
Listed on
July 22, 2026
What is AssemblyAI?
AssemblyAI is a Voice AI platform offering a suite of APIs for speech-to-text transcription and speech understanding. It provides pre-recorded, real-time, and sync transcription APIs, along with models for speaker diarization, sentiment analysis, and content moderation. The platform is designed for developers to build voice-enabled products at scale.
How to use AssemblyAI?
- To use AssemblyAI, developers sign up for an API key, then integrate the appropriate API (Pre-recorded, Realtime, or Sync) into their application. They can upload audio files or stream audio, and receive transcripts and insights via API responses or webhooks. The platform offers documentation, code samples, and a no-code playground for testing.
Core features of AssemblyAI
- Pre-recorded Speech-to-Text API with 99+ languages
- Realtime Speech-to-Text API with ~150ms latency
- Sync Speech-to-Text API for short clips
- Speech Understanding API (speaker diarization, sentiment, entities)
- Voice Agent API for building voice agents
- Guardrails for PII redaction and content moderation
- LLM Gateway for routing to multiple LLMs
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