AssemblyAI

by AssemblyAI

Universal-2 model + diarization, PII redaction, topic detection, summarization.

Category
Transcription APIs
License
—
Stars
—
Last push
—
Pricing
from $0.37/hr
Platforms
API

What it is

AssemblyAI ships its own Universal-2 ASR model alongside a rich NLP layer: speaker diarization, PII redaction, auto-chapters, topic detection, and sentiment. HIPAA-eligible with a BAA on higher tiers. Good pick for products that need the transcript to be a starting point, not the finish line. Last price check: 2026-04-20.

Best for: Product teams that want transcription + NLP (summaries, topics, sentiment, PII) in one API.
Watch out for: Per-minute cost rises with add-ons; proprietary model (Universal-2), so no self-host path.

Install / use

POST https://api.assemblyai.com/v2/transcript

Features

Speaker diarizationYes
Word-level timestampsYes
Streaming / real-timeYes
Languages supported99
HIPAA eligibleYes

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