How to Build Your Own AssemblyAI
Replace AssemblyAI with a custom build. AI models to transcribe and understand speech
Build Difficulty: 5/5
Build a working replacement in a weekend with AI tools
Estimated Timeline
Based on 38 features at Weekend Project difficulty, expect about One weekend with AI-assisted development.
Recommended Tech Stack
Full-stack React framework with API routes and server components
PostgreSQL database, auth, and real-time subscriptions
Utility-first styling for rapid UI development
Key Features to Replicate
Top features across 8 categories. See all 38 features
Speech Understanding(6 features)
Identify a wide range of entities spoken in audio files such as person names, company names, email addresses, dates, and locations
Automatically detect language in multilingual speech
Detect the sentiment of each sentence of speech in audio files
Detect multiple speakers in audio and segment transcript into utterances, showing what each speaker said
Identify speakers by their actual names or roles, transforming generic labels into meaningful identifiers
+1 more in this category
Text Processing(5 features)
Automatically generate summaries over time for audio and video files
Automatically add punctuation and proper casing to transcriptions for clearer outputs
Automatically standardize and format specific types of information in transcripts including dates, phone numbers, and emails
AI-powered automatic summarization of audio and video data with customizable summary types
Get precise timestamp information for each word in transcription
AI Model(3 features)
High-accuracy speech model supporting 99 languages with strong out-of-the-box performance for general-purpose use cases
Most advanced speech language model with prompt-based architecture for deeper contextual understanding and domain-specific customization
Ultra-fast, ultra-accurate real-time transcription model designed for voice agents with built-in turn detection and unlimited concurrency
Customization(3 features)
Define custom spelling for words to ensure accurate transcription of specialized terminology
Provide up to 1,000 words or phrases to improve transcription accuracy for specific terminology
Control transcription behavior with plain language prompts to provide context and tag audio events
Text Analysis(3 features)
Identify and track filler words in transcriptions
Accurately identify significant words and phrases in transcription to extract pertinent concepts or highlights
Label the topics spoken in audio and video files using standardized IAB Taxonomy for contextual targeting
Compliance(2 features)
Data storage and processing within EU for GDPR compliance
Business Associate Agreement and HIPAA compliance for healthcare applications
Content Moderation(2 features)
Detect sensitive content in audio and video files including hate speech, violence, sensitive social issues, alcohol, and drugs
Automatically filter out profanity from transcripts
Core Transcription(2 features)
Transcribe pre-recorded audio and video files with high accuracy using Universal models with language detection and formatting
Real-time transcription of live audio and video with ultra-low latency and high accuracy
Cost Calculator
Pricing data not available for AssemblyAI. Check their website for current pricing.