Novu Notification Infrastructure

Novu is an open-source notification infrastructure platform providing a unified API for sending notifications across multiple channels including email, SMS, push notifications, in-app messages, and chat. Founded in 2021 by Dima Grossman and Tomer Schlesinger in Tel Aviv, Israel. Raised $6.5 million from Bain Capital Ventures, Aleph, Angular Ventures. Serves over 10,000 developers. First open-source notification infrastructure. Key features: unified API: single API for all channels. Send via email (Resend, SendGrid, Mailgun, Postmark, SES), SMS (Twilio, SMS77, Telnyx, Plivo), push (Firebase Cloud Messaging, Expo Push, OneSignal), chat (Slack, Discord, MS Teams), and in-app. Notification workflows: design multi-step workflows with delays, conditions, channel fallbacks using a visual editor. Example: send email, wait 1 hour, if no response send SMS. Templates: create message templates for each channel. Handlebars for dynamic content. Localization and internationalization. Digest engine: batch multiple notifications into a single digest. Prevent notification fatigue by aggregating similar notifications over a time window. Subscriber management: manage subscribers and preferences. Each subscriber has channel credentials (email, phone, device tokens). Preference management: let users choose which notifications and channels. In-app notification center: embeddable React component showing a notification feed with real-time updates, read/unread states, actions. Activity feed: track all sent notifications and delivery status. Analytics: open rates, click rates, delivery rates per channel. Self-hosted or managed cloud. SDKs: Node.js, PHP, Python, Go, .NET, Ruby, Kotlin, Flutter. REST API and GraphQL. Webhooks. TypeScript. MPL 2.0.