AssemblyAI API
Artificial Intelligence
Speech AI API for speech-to-text, speaker identification, PII redaction, and audio intelligence
AssemblyAI API Highlights
AssemblyAI API is best for enterprise apps, legal tech, and fintechs needing speech-to-text with automated PII redaction and audio intelligence
API Key (Authorization header)
High-volume batch and real-time streaming concurrency
Nigeria
Ghana
KenyaAssemblyAI is an enterprise-grade speech AI company providing state-of-the-art APIs for speech-to-text, speaker detection, and audio intelligence. Powered by their proprietary Conformer model architecture, AssemblyAI accurately transcribes phone calls, podcasts, video meetings, and webinars across multiple languages.
AssemblyAI distinguishes itself with its deep 'Audio Intelligence' layer: developers can toggle automated chapter generation, PII redaction (masking credit card numbers, SSNs, and phone numbers in compliance with privacy regulations), sentiment analysis, and LeMUR (Large Language Model framework specialized for speech understanding and question answering over audio).
AssemblyAI API Core Features & Capabilities
| Feature | Status | Description & Capabilities |
|---|---|---|
| Natural Language Processing (NLP) | ✓ Supported | Provides native Natural Language Processing (NLP) capabilities integrated within the API. |
| Speech / Audio Processing | ✓ Supported | Provides native Speech / Audio Processing capabilities integrated within the API. |
| Machine Translation & Language Detection | ✓ Supported | Provides native Machine Translation & Language Detection capabilities integrated within the API. |
| Generative AI / Text Generation (LLM) | ✓ Supported | Provides native Generative AI / Text Generation (LLM) capabilities integrated within the API. |
| Sentiment & Emotion Analysis | ✓ Supported | Provides native Sentiment & Emotion Analysis capabilities integrated within the API. |
| Named Entity Recognition (NER) | ✓ Supported | Provides native Named Entity Recognition (NER) capabilities integrated within the API. |
| Image Recognition & Computer Vision | ✗ Not Supported | Image Recognition & Computer Vision is currently not supported by AssemblyAI API. |
| Nigerian Language Support (Yoruba / Igbo / Hausa) | ✗ Not Supported | Nigerian Language Support (Yoruba / Igbo / Hausa) is currently not supported by AssemblyAI API. |
- Free tier with initial credits
- Pay-as-you-go speech-to-text at $0.0062 per minute (Conformer-2); Core Audio Intelligence models (Sentiment, Summarization, PII Redaction) from $0.0017/min
Required Access Documents for AssemblyAI API
- AssemblyAI AccountRequiredSign up at assemblyai.com to retrieve your API key
Different AssemblyAI API use cases
- Call Center Compliance & Redaction:Transcribe customer care calls and redact customer payment cards and identity data.
- Podcast Content Repurposing:Generate automatic show notes, timestamps, chapters, and social media quotes from audio.
- Virtual Meeting Assistants:Produce meeting summaries, action items, and speaker quotes from recorded Google Meet/Zoom calls.