"We thrive on information asymmetry. Subsignal gives me a leg up with the sectors I'm most interested in. When sector leaders make a move, I'm the first to know."

"Look, capital is a commodity, the real value is if you can help founders with market intelligence right when they need it. With Subsignal, I get a front seat view to competitive landscape that others simply don't have."

"In venture, relationships are everything. Founders don't re-engage once they prove the market, Subsignal helps me plug myself into the conversation. Helping us stay relevant with our would-be portfolio companies."

• Market Intelligence – Get a leg up with the sectors you're most interested in. Every change, no matter how small, gets flagged.
• Deal Intelligence – Time your bets better. Track companies you passed on and re-engage when they hit key milestones. Turn comeback stories into portfolio wins.
• Relationship Intelligence – Stay connected through pivots and false starts. Monitor passed opportunities for breakthrough moments. Be the investor they turn to.
• Competitive Intelligence – Track competitive threats to your portfolio companies. Whether it's roadmap updates, pricing shifts, or positioning plays, be the first to know.

subsignal/
├── public/           # Static assets (images, videos, icons, etc.)
├── app/              # Next.js app directory (routes, pages, layouts)
├── components/       # Reusable React components
├── lib/              # Library code (auth, database, utilities)
├── services/         # Business logic and external services
├── hooks/            # Custom React hooks
├── types/            # TypeScript type definitions
├── db/               # Database schema and migrations
├── drizzle/          # Database migration files
├── emails/           # Email templates and components
├── constants/        # Application constants and configuration
├── providers/        # React context providers
├── schema/           # Data validation schemas
├── client/           # Client-side utilities and configurations
├── repository/       # Data access layer
├── payments/         # Payment processing (DodoPayments integration)
├── ingest/           # Data ingestion and processing functions
├── content/          # Static content and documentation
├── docs/             # API documentation and examples
├── .next/            # Next.js build output
├── node_modules/     # Dependencies
├── package.json      # Project metadata and scripts
├── tsconfig.json     # TypeScript configuration
├── drizzle.config.ts # Database configuration
└── README.md         # Project documentation

• Most of the application logic and UI lives in the app/ and components/ directories.
• Database schema is defined in db/schema and managed with Drizzle ORM.
• The services/ directory contains business logic and external service integrations.
• Email templates are in the emails/ directory using React Email.

Thank you for your interest in contributing to Subsignal!

• Node.js 18+ and pnpm
• PostgreSQL database
• Various API keys (see Environment Variables section)

1. Clone the repository

   git clone <repository-url>
   cd subsignal

2. Install dependencies

   pnpm install

3. Copy and configure environment variables

   cp .env.example .env.local

   Fill in the required values (see Environment Variables section below).

4. Set up the database

   pnpm db:generate
   pnpm db:migrate

5. Run the development server

   pnpm dev

The app will be available at http://localhost:3000 by default.

Create a .env.local file in the project root and configure the required environment variables:

cp .env.example .env.local

Key environment variables you'll need:

• Database: PostgreSQL connection string
• Authentication: Better Auth with Google OAuth credentials
• AI Services: OpenAI API key for intelligent briefings
• Email: Resend API for automated notifications
• Storage: Cloudflare R2 for briefings and screenshots
• Payments: DodoPayments integration for subscriptions
• Background Jobs: Inngest for scheduled monitoring

See .env.example for the complete list with descriptions.

• pnpm dev - Start development server with Turbopack
• pnpm build - Build the project for production
• pnpm start - Start production server
• pnpm lint - Check for linting issues
• pnpm typecheck - Check TypeScript types
• pnpm format - Auto-format code with Prettier

• pnpm db:generate - Generate database migrations
• pnpm db:migrate - Apply database migrations
• pnpm db:studio - Open Drizzle Studio for database management
• pnpm db:push - Push schema changes to database
• pnpm db:pull - Pull schema changes from database

• pnpm email - Start React Email development server (port 4040)
• pnpm inngest - Start Inngest development server
• pnpm hookdeck - Start Hookdeck tunnel for webhooks

View the complete API documentation at docs/example.md or use the Postman collection at docs/subsignal.postman_collection.json.

Base URL: http://localhost:3000/api (Development) or https://subsignal.app/api (Production)

Key endpoints:

• /api/auth/* - Authentication (Better Auth with Google OAuth)
• /api/v1/companies - Company management
• /api/v1/pages - Page monitoring
• /api/v1/preferences - User preferences
• /api/health - Health checks

• Frontend: Next.js 15, React 19, TypeScript, Tailwind CSS
• Backend: Hono API framework, PostgreSQL with Drizzle ORM
• Authentication: Better Auth with Google OAuth
• AI: OpenAI GPT for briefing generation and analysis
• Email: React Email with Resend
• Payments: DodoPayments integration
• Background Jobs: Inngest for monitoring automation
• Storage: Cloudflare R2 for briefings and screenshots
• UI Components: Radix UI, Lucide React, Sonner toasts

• Run pnpm lint to check for linting issues
• Run pnpm typecheck to check TypeScript types
• Run pnpm format to auto-format code
• Follow the existing code style and patterns

• Run pnpm build to build the project for production
• Ensure all tests pass and no type errors exist

• Do not commit files or folders listed in .gitignore
• Use clean and clear code for maintainability
• Follow the existing code style and structure
• Test your changes thoroughly before submitting

Get intelligent summaries of company changes and market movements delivered directly to your inbox.

Track all your portfolio companies and prospects in one centralized dashboard.

View and organize all your briefings with smart filtering and search capabilities.

Configure what you want to track and how often you want to receive updates.

Visual comparisons showing exactly what changed on company websites over time.

Comprehensive view of all intelligence features working together to keep you informed.

Subsignal offers flexible plans for different investment workflows:

• Solo Plan: $129/month - Perfect for individual VCs (10 companies, 50 pages)
• Fund Plan: $399/month - For investment teams (50 companies, 100 pages)
• Enterprise: Custom pricing - Unlimited tracking for large funds