
cossistant
Open-source, AI-native support system with fully customizable AI support agents — for developers shipping fast, beautiful SaaS.
Stars: 53

Cossistant is an open source chat support widget tailored for the React ecosystem. It offers headless components for building customizable chat interfaces, real-time messaging with WebSocket technology, and tools for managing customer conversations. The tool is API-first, self-hosted, developer-friendly with TypeScript support, and provides complete integration flexibility. It uses technologies like Next.js, TailwindCSS, and WebSockets, and supports databases like PlanetScale for production and DBgin for local development. Cossistant is ideal for developers seeking a versatile chat solution that can be easily integrated into their applications.
README:
Open source chat <Support /> widget for React
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Cossistant is an open source chat support widget focused on the React ecosystem. Built for developers who need a flexible, customizable chat solution that integrates with their applications. It provides headless components, real-time messaging, and a complete backend infrastructure.
Headless Components: Collection of unstyled, accessible React components to build your perfect chat interface.
Real-time Messaging: WebSocket-powered live chat with instant message delivery and presence indicators.
Conversation Management: Organize and track customer conversations with persistent chat history.
API-First Design: RESTful and tRPC APIs for complete integration flexibility.
Self-Hosted: Full control over your data with easy deployment options.
Developer-Friendly: TypeScript-first with excellent DX and comprehensive documentation.
Install dependencies and run the development environment:
bun install --workspaces
bun dev
- Monorepo
- Bun
- React
- TypeScript
- Next.js
- Hono
- tRPC
- Drizzle ORM
- TailwindCSS
- WebSockets
- PlanetScale (Production Postgres)
- DBgin (Local Development)
- Resend (Transactional Email)
- Drizzle (Database ORM)
- Better Auth (Authentication)
- Create an account on PlanetScale
- Create a new Postgres database
- Get your connection string from the dashboard
For local development, use DBgin for a quick PostgreSQL setup.
-
Configure your database connection in the
.env
file:DATABASE_URL=postgresql://[user]:[password]@[endpoint]/[dbname]
-
Run the database migrations:
cd apps/api bun db:migrate
To make changes to the database schema:
- Update the schema files in
apps/api/src/db/schema
- Generate migrations:
cd apps/api bun db:generate
This project is licensed under the AGPL-3.0 for non-commercial use.
For commercial use or deployments requiring a setup fee, please contact us for a commercial license at [email protected].
By using this software, you agree to the terms of the license.
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