AI-powered contract analysis tool for risk detection, clause evaluation, and comprehensive legal document review.
- AI-Powered Risk Detection - Uses Claude Sonnet 4 to identify potential legal and business risks
- Executive Summaries - Comprehensive 4-6 sentence overview of contract essentials
- Risk Categorization - Automatically classifies risks by severity (CRITICAL/HIGH/MEDIUM/LOW/MINIMAL)
- Missing Clause Detection - Identifies important missing provisions
- Red Flag Identification - Highlights unusual or unfavorable terms
- Actionable Recommendations - Specific suggestions for contract improvements
Compare two contracts side-by-side to identify differences and determine which is more favorable.
Features:
- Side-by-side risk analysis
- Visual risk distribution charts
- Key differences identification
- Unique clause detection
- "Which is better?" AI recommendation
- Individual detailed analyses for each contract
Deep analysis of specific contract clauses with expert insights.
Supported Clauses:
- Payment Terms
- Liability
- Termination
- Confidentiality
- Intellectual Property
- Warranties
- Indemnification
- Dispute Resolution
- Force Majeure
- Non-Compete
- Governing Law
Analysis Includes:
- Exact clause text extraction with location
- Plain language summary
- Risk assessment specific to clause
- Favorability rating (Favorable/Neutral/Unfavorable)
- Clause-specific recommendations
- Guidance when clause is missing
Generate beautifully formatted PDF reports ready to share with stakeholders.
PDF Contents:
- Color-coded risk badges
- Comprehensive metrics table
- Executive summary
- Detailed risk assessment
- Red flags and missing clauses
- Professional typography and layout
- Multi-Format Support - PDF, DOCX, DOC file uploads
- Export Options - TXT, HTML, and PDF report formats
- Automated Fallback - Works without API key using rule-based analysis
- Clean Modern UI - Professional light theme with intuitive navigation
- Mode-Based UX - Clear separation between analysis types
- Python 3.8+
- Anthropic API key (optional for AI features)
- Clone the repository
git clone https://github.com/MattiasNyqvist/contract-analyzer.git
cd contract-analyzer- Create virtual environment
python -m venv venv
venv\Scripts\activate # Windows
# source venv/bin/activate # Mac/Linux- Install dependencies
pip install -r requirements.txt- Configure API key
Create
.envfile:
ANTHROPIC_API_KEY=your_api_key_here
Get your API key from: https://console.anthropic.com/
- Run the application
streamlit run app.pyOpen http://localhost:8501 in your browser.
- Select "Analyze One Contract" mode
- Choose analysis detail (Full Analysis or Quick Summary)
- Upload your contract (PDF/DOCX)
- Click "Analyze Contract"
- Review results and download reports
- Select "Compare Two Contracts" mode
- Upload both contracts
- Click "Compare Contracts"
- Review side-by-side comparison
- See which contract is more favorable
- Select "Deep Dive: Specific Clause" mode
- Choose clause type (e.g., Payment Terms)
- Upload contract
- Click "Analyze [Clause Type] Clause"
- Review detailed clause analysis
- Python 3.8+ - Primary language
- Streamlit - Web application framework
- Anthropic Claude API - AI-powered analysis (Sonnet 4)
- PyPDF2 - PDF text extraction
- pdfplumber - Advanced PDF parsing
- python-docx - Word document handling
- Pandas - Data manipulation
- Plotly - Interactive charts and graphs
- ReportLab - Professional PDF generation
- Custom HTML templates - HTML reports
- python-dotenv - Environment variable management
- Pillow - Image processing
- openpyxl - Excel support
contract-analyzer/
├── app.py # Main Streamlit application
├── version.py # Version info and metadata
├── requirements.txt # Python dependencies
├── .env.example # Environment variables template
├── .gitignore # Git ignore rules
│
├── config/
│ ├── settings.py # App configuration
│ └── prompts.py # AI prompts for analysis
│
├── modules/
│ ├── contract_analyzer.py # AI contract analysis
│ ├── contract_comparator.py # Contract comparison logic
│ ├── clause_finder.py # Clause extraction & analysis
│ ├── file_handler.py # File upload handling
│ ├── text_extractor.py # PDF/DOCX text extraction
│ ├── risk_detector.py # Automated risk detection
│ ├── report_builder.py # TXT/HTML report generation
│ └── pdf_generator.py # PDF report generation
│
├── ui/
│ ├── sidebar.py # Sidebar components
│ ├── results_display.py # Analysis results UI
│ ├── comparison_view.py # Comparison results UI
│ └── clause_view.py # Clause analysis UI
│
├── utils/
│ ├── session_manager.py # Session state management
│ └── validators.py # Input validation
│
├── data/
│ └── sample_contract.pdf # Sample contract for testing
│
└── docs/
└── screenshots/ # Application screenshots
- Legal Review - Initial contract assessment before lawyer review
- Vendor Evaluation - Compare multiple vendor agreements
- Risk Management - Identify potential legal and financial risks
- Negotiation Prep - Understand weak points before negotiations
- Compliance Check - Verify presence of required clauses
- Educational - Learn about contract structures and clauses
- Not Legal Advice - This tool provides analysis, not legal counsel
- AI Variability - Results may vary slightly between runs
- English Only - Currently optimized for English contracts
- API Required - Full AI features require Anthropic API key
- File Size - Works best with contracts under 50 pages
- Local Processing - Text extraction happens locally
- API Only - Only contract text sent to Anthropic API
- No Storage - Contracts not stored on servers
- Session-Based - Data cleared when browser closed
- Open Source - All code available for review
Contributions welcome! Please feel free to submit a Pull Request.
This project is licensed under the MIT License - see the LICENSE file for details.
Mattias Nyqvist
- Portfolio: [Coming Soon]
- LinkedIn: https://www.linkedin.com/in/mattias-nyqvist/
- GitHub: @MattiasNyqvist
- Anthropic for Claude API
- Streamlit for the amazing framework
- ReportLab for PDF generation capabilities
- Initial release
- Core contract analysis features
- Contract comparison mode
- Clause-by-clause deep dive
- Professional PDF export
- Multi-format support (PDF, DOCX, DOC)
- Export to TXT, HTML, and PDF
Built with care for better contract analysishttps://www.linkedin.com/in/mattias-nyqvist/