AssemblyAI
Speech AI for developers
- Status
- Generally available
- Last checked
- Checked · Oct 11, 2026
- License
- Proprietary
- Pricing
- Free tier
What it is
AssemblyAI is a speech AI API platform offering transcription, speaker diarization, topic detection, sentiment analysis, and audio intelligence in one SDK. Its Lemur feature lets you run LLM prompts directly on audio data without transcribing first.
When it fits — and when it doesn’t
A good fit for
Developers building apps that need transcription plus audio intelligence features like PII redaction, topic detection, and summarization
Look elsewhere if
Real-time sub-200ms voice streaming that requires Deepgram-level speed
Known weaknesses
Each one links to the public issue, changelog or docs page it came from, where we have one.
No verified weaknesses on file yet. That’s a gap in our data, not a clean bill of health.
What it does well
Transcription
Speaker diarization
Lemur (LLM on audio)
Sentiment analysis
PII redaction
Auto-chapters
Pricing
- Free tier
- Yes
- Paid from
- —
- Model
- Usage-based
- Enterprise plan
- No
Pricing not independently confirmed — check the vendor’s page.
Performance benchmarks
How Fast Is It?
Set up AssemblyAI
Setup steps, common gotchas and what to check after 30 days.
Get the badge
A small badge for AssemblyAI’s README or site: its name, “Tracked on AI Navigator”, and the availability status and check month from this page. It updates as the catalog does.
Markdown
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