AI Transcription / Review
AssemblyAI
API de speech-to-text pra devs.
96.9%
Accuracy (tested)
$0.15/hr
From
Yes
Free tier
AssemblyAI is a speech-to-text API built for developers. It was the most accurate tool in our reference test at 96.9% word accuracy, and it uses pay-as-you-go pricing from $0.15 per hour of audio, with free credits to start. It fits best if you are building transcription into your own product rather than looking for a ready-made app.
Developers who want a speech-to-text API with built-in audio intelligence like summarization, sentiment, and LLM queries.
Strengths
- +Universal-2 model, strong English accuracy
- +LeMUR runs LLMs over your transcripts
- +Sentiment, topics, PII redaction built in
- +Generous free credit to start
Trade-offs
- –API-only, no end-user app
- –Real-time streaming is English-only
- –Costs climb with intelligence add-ons
AssemblyAI at a glance
- Languages
- 99+
- API
- Yes
- Real-time
- Yes
- Speaker labels
- Yes
- Export formats
- JSON, TXT, SRT, VTT
- Human option
- No