Novu

Novu is an open-source notification infrastructure for developers that makes it easy to build powerful notification capabilities into applications.

Some key benefits:

• Unified API for multiple channels: Send notifications via email, SMS, push, chat and more through a single API.
• Powerful workflow engine: Create complex notification flows with conditions, delays, and multi-step sequences.
• Customizable templates: Design reusable notification templates with variables and conditional logic.
• In-app notification center: Easily add an inbox and notification preferences to your app.
• Integrations: Connect to popular services like Slack, Discord, Twilio and more.
• Developer-friendly: API-first approach with SDKs for popular languages and frameworks.
• Open source: Fully open source and self-hostable for complete control and customization.
• Scalable infrastructure: Built to handle high volumes of notifications reliably.

With Novu, developers can quickly implement a robust notification system without having to build everything from scratch. The open-source nature also allows for extensive customization when needed.