Assembly AI
verifiedFree trialLeading speech-to-text and audio-intelligence API for developers.
What it does
AssemblyAI provides State-of-the-Art AI models for automatic speech recognition (ASR), natural language processing (NLP), and AI speech-to-text. It enables users to transcribe speech to text and extract insights from voice data. The platform offers speech-to-text, streaming speech-to-text, and speech understanding capabilities, catering to startups and enterprises for reliable source-truth data that powers world-class products.
Core features
- ✦Speech-to-Text
- ✦Streaming Speech-to-Text
- ✦Speech Understanding
- ✦Speaker Diarization
- ✦Sentiment Analysis
- ✦PII Redaction
- ✦Content Moderation
- ✦Automatic Language Detection
Use cases
- →Conversation Intelligence
- →Voice Agents
- →Customer Support Analysis
- →Summarizing Meeting Transcripts
Pricing
Speech-to-Text Universal-3.5 Pro: $0.21/hr (pre-recorded audio)
Speech-to-Text Universal-2: $0.15/hr (older model)
Streaming Universal-3.5 Pro Realtime: $0.45/hr (billed per session duration)
Streaming Universal-Streaming: $0.15/hr (English or multilingual)
Voice Agent API: $4.50/hr (all-inclusive STT+LLM+TTS)
Reviews
Big-picture takes: what it's for and whether it delivers. High-engagement videos from YouTube — not sponsored.
AssemblyAI - Build AI applications with spoken data
AssemblyAI · 3.7M views