Novu

Novu is an open-source communication infrastructure platform for product teams, developers, and AI agent builders that need reliable notifications across many channels. It helps teams orchestrate transactional messages for inbox, email, SMS, push, chat, Slack, Microsoft Teams, Telegram, and more from one system instead of wiring every provider separately. The platform is built around workflows, subscribers, channels, and a customizable Inbox component. Developers can trigger notification workflows through a unified API, design flows visually in the dashboard, or define code-first workflows with the Novu framework. That makes it useful for SaaS product alerts, account updates, approvals, security messages, lifecycle messaging, and internal operations. Novu has also moved beyond classic notification infrastructure with Agent Communication Infrastructure. ACI helps connect AI agents to user-facing channels such as Slack, Teams, WhatsApp, Telegram, and email while handling webhooks, identity, conversation state, and delivery. This makes Novu especially relevant for teams building products where agents need to talk to customers or internal users across multiple surfaces. The biggest reason to choose Novu is control. It gives teams open-source flexibility, cloud convenience, self-hosting options, workflow orchestration, inbox UI, provider integrations, and pricing based on workflow runs. It is strongest for engineering-led teams that want notification infrastructure they can customize deeply, but it may be more technical than simple email-only or push-only tools.