AssemblyAI
AI speech recognition and audio intelligence API with transcription, sentiment analysis, and content moderation.
What is AssemblyAI?
AssemblyAI is a speech AI platform that provides production-ready APIs for transcription, audio intelligence, and speech understanding. It offers real-time and async transcription with speaker diarization, sentiment analysis, PII redaction, and content moderation. Trusted by over 200,000 developers and processing millions of audio files daily for startups and enterprises alike.
Best for: Developer teams building speech features · High-volume transcription needs · Audio intelligence at scale
Developer Stack Fit
Quick read on where AssemblyAI fits in a software team's AI stack. Validate final fit against your codebase, data policy, and deployment model.
- Stack layer
- Secondary/general AI
- Deployment model
- Cloud SaaS
- Open-source status
- Not confirmed
- API support
- API or integration-friendly
- MCP support
- No MCP signal found
- Security posture
- Review vendor privacy and data retention
- Best use case
- Developer teams building speech features
Key Features
- 01
Real-time and async transcription with 95%+ accuracy
Production-ready speech-to-text API
- 02
Speaker diarization with speaker labeling
Real-time transcription with diarization
- 03
Sentiment analysis on transcribed content
Audio intelligence (sentiment, PII, topics)
- 04
PII redaction for compliance and privacy
A core audio capability that teams use daily.
- 05
Content moderation and topic detection
A core audio capability that teams use daily.
- 06
Auto chapters and summarization
A core audio capability that teams use daily.
- 07
Entity detection (dates, locations, amounts)
A core audio capability that teams use daily.
- 08
Support for 100+ languages
A core audio capability that teams use daily.
Pros & Cons
What stands out
- 95%+ transcription accuracy
- Generous free tier (100 hours/month)
- Rich audio intelligence features
- Real-time transcription support
- Excellent developer documentation
Watch outs
- API-only, no GUI for non-technical users
- Accuracy can vary with audio quality
- Pay-per-hour pricing adds up at scale
- Limited language support compared to some competitors
Pricing Plans
AssemblyAI Pricing
Choose the perfect plan for your needs. All plans include our core features with different usage limits and advanced capabilities.
Free
Enterprise
Pro
Need a Custom Solution?
Looking for enterprise features or custom pricing? Contact AssemblyAI directly for tailored solutions.
Contact SalesMost teams land on the Pro plan.
Alternatives
FAQ
What is AssemblyAI and how does it work?
AssemblyAI is a audio tool that ai speech recognition and audio intelligence api with transcription, sentiment analysis, and content moderation.. It uses AI to help users improve productivity through analyzing input and generating relevant output.
How much does AssemblyAI cost?
AssemblyAI starts at $0/month. They offer a free trial so you can test it before committing.
Does AssemblyAI have a free trial?
Yes — Free to try with no time limit.
What can AssemblyAI do?
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AssemblyAI
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