About
AssemblyAI provides speech-to-text, streaming speech-to-text, speech understanding, guardrails, and an LLM gateway for voice and audio applications. The platform exposes APIs for prerecorded transcription, real-time transcription, speaker diarization, language detection, keyterms prompting, custom formatting, sentiment analysis, summarization, entity detection, PII redaction, and related audio intelligence features.
The pricing page lists pay-as-you-go usage for the hosted API and a free offer of $50 in credits with no credit card required. Free users can start 5 new streaming sessions per minute, while pay-as-you-go accounts start with 100 new streams per minute. The service is aimed at developers building transcription, voice agents, contact center workflows, medical transcription, and other speech-processing applications.
- Speech-to-text and streaming transcription APIs
- Speaker diarization and speaker identification
- Language detection and code-switching support
- Sentiment, summaries, topics, and chapters
- PII redaction and profanity filtering
- $50 signup credits
- 5 new streams per minute on free accounts
What's included in the free tier
- $50 in free credits for AssemblyAI’s Speech-to-Text APIs.
- Free users can start 5 new Universal-Streaming sessions per minute.
- No credit card required to get started with the free offer.
See AssemblyAI pricing for current limits.
