TL;DR - AssemblyAI
- AssemblyAI provides AI models for speech-to-text, speaker detection, and audio intelligence
- It transcribes audio with high accuracy and extracts insights like sentiment and topics
- Pay-as-you-go from $0.00025/second, free tier available
Pricing: Free plan available
Best for: Growing teams
Score: 86/100
Pricing Plans
free trialFree
Free
$50 credits
- 185 hours transcription
- 333 hours streaming
- All core features
- Community support
Most Popular
Best
$0.37/hour
Highest accuracy
- Premium transcription
- All languages
- Audio intelligence
- LeMUR access
Nano
$0.12/hour
Speed optimized
- Fast processing
- Good accuracy
- Cost effective
- All features
Enterprise
Custom
High volume
- Up to 50% discount
- Dedicated support
- Custom rate limits
- SLA guarantee
About AssemblyAI
AssemblyAI transcribes audio and video with accuracy that makes editing the transcript faster than re-typing. Upload files or stream in real-time, get back text you can actually use.
Beyond transcription, the API handles speaker diarization, sentiment analysis, and topic detection. Entity recognition identifies names, places, and other structured information in speech.
Applications that process audio—call analytics, podcast tools, meeting transcription—build on AssemblyAI because transcription accuracy determines whether downstream features are useful.
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AssemblyAI FAQ
Free tier includes 3 hours of transcription monthly. Pay-as-you-go starts at $0.65/hour for speech-to-text. Volume discounts available.
AssemblyAI provides AI speech-to-text and audio intelligence APIs. Transcription, speaker diarization, content moderation, summarization, and more.
AssemblyAI claims industry-leading accuracy with their Conformer models. Generally 90%+ for clear audio. Accuracy depends on audio quality, accents, and domain.
AssemblyAI is a managed API service with additional features. Whisper is open source and can run locally. AssemblyAI for convenience; Whisper for control and cost savings at scale.
Speech-to-text, speaker diarization (who spoke when), sentiment analysis, summarization, chapter detection, PII redaction, and content moderation.