Privacy-first legal transcription tool for evidence processing
Extract and analyze audio/video evidence with AI transcription, speaker diarization, and secure case preparation workflows.

Transform how law offices handle evidence by providing accurate, secure transcription of videos, audio recordings, and depositions with privacy-first design and chain-of-custody integrity.

• Multi-format Support - Process video/audio evidence (MP4, MOV, WAV, MP3, etc.)
• AI Transcription - Faster-Whisper large-v3 for high accuracy
• Speaker Identification - Automatic diarization with manual refinement
• Interactive Editor - Real-time transcript editing with media sync
• Smart Clipping - Extract precise segments with context
• Multiple Exports - SRT, DOCX, PDF Quote Packs, CSV

• Zero Storage Default - Process and delete unless explicitly opted-in
• End-to-End Encryption - XChaCha20-Poly1305 with per-tenant keys
• Chain of Custody - SHA-256 hashing with immutable audit trails
• Flexible Retention - 0/7/30/90 day policies per case
• Air-gapped Workers - Sandboxed processing with no internet access

• Case Management - Organize by matter/client with role-based access
• Learning Dictionaries - Custom terminology and correction rules
• Audit Reports - Complete provenance tracking for legal admissibility
• Quality Metrics - Confidence scoring and accuracy indicators

• Project Setup - Monorepo structure with Next.js frontend, FastAPI backend
• Basic Infrastructure - Docker Compose with Postgres, Redis, MinIO
• Core Pipeline - Audio normalization → ASR → Alignment → Export
• Simple UI - Two-pane player with basic transcript editing
• Local Processing - CPU-based transcription for development

• Security Implementation - JWT auth, encryption, audit logging
• Advanced Pipeline - Speaker diarization, user dictionaries, corrections
• Professional UI - Dark/light themes, keyboard shortcuts, find/replace
• Export System - Multiple formats with embedded audit data
• Case Management - Multi-tenant architecture with role permissions

• GPU Workers - CUDA acceleration for production workloads
• Advanced Editing - Speaker renaming, confidence filtering, bulk operations
• Quality Assurance - Golden file testing, performance benchmarks
• Documentation - API docs, admin guides, security procedures
• Deployment Ready - Production infrastructure, monitoring, scaling

• Client-Side Encryption - Browser-only processing with encrypted bundles
• Real-time Processing - Live transcription capabilities
• Multi-language Support - Beyond English-only processing
• Court Reporter Integration - Certified transcript workflows
• Advanced Analytics - Speech patterns, keyword extraction, sentiment analysis

┌─────────────────┐    ┌─────────────────┐    ┌─────────────────┐
│   Next.js UI   │────│   FastAPI       │────│  GPU Workers    │
│   (Browser)     │    │   Gateway       │    │  (Celery)       │
└─────────────────┘    └─────────────────┘    └─────────────────┘
         │                       │                       │
         │              ┌─────────────────┐             │
         │              │     Redis       │             │
         └──────────────│     Queue       │─────────────┘
                        └─────────────────┘
                                 │
                    ┌─────────────────────────────────┐
                    │        Storage Layer            │
                    │  ┌─────────────┐ ┌─────────────┐ │
                    │  │  Postgres   │ │   MinIO     │ │
                    │  │  (Metadata) │ │  (Objects)  │ │
                    │  └─────────────┘ └─────────────┘ │
                    └─────────────────────────────────┘

# Clone and setup
git clone <repository-url>
cd caseprep

# Start development environment
make up

# Run frontend (development)
cd apps/web && npm run dev

# Access application
open http://localhost:3000

Target Market: Small to medium law firms, solo practitioners, legal assistants

Pricing Tiers:

• Starter: $29/month - 10 hours processing
• Professional: $99/month - 50 hours + advanced features
• Enterprise: $299/month - Unlimited + custom integrations

Revenue Projections:

• Year 1: $50K ARR (100 customers)
• Year 2: $250K ARR (500 customers)
• Year 3: $750K ARR (1,200 customers)

• Implementation Plan - Detailed technical specifications
• Security Overview - Privacy, encryption, and compliance
• Deployment Guide - Infrastructure and scaling
• Architectural Decisions - Key design choices
• Future Options - Alternative approaches and enhancements

1. Privacy First - No data stored by default, user controls all retention
2. Accuracy Over Speed - Legal-grade transcription quality prioritized
3. Chain of Custody - Complete audit trails for legal admissibility
4. Self-Hostable - Full control over sensitive legal data
5. Professional Grade - Built for legal industry standards and workflows

Status: Active Development | License: Commercial | Contact: [Your Contact Info]