Open-source Knock alternatives

Novu is open-source communication infrastructure for products and AI agents. It offers one API and a unified conversation model that connects your software to the channels your users already use, reaching them by email, SMS, push, an in-app inbox, Slack, Microsoft Teams, Telegram and other chat apps. It is written in TypeScript with Node.js and React, and GitHub lists the license as 'Other'.

There are two ways to build with it that share the same foundation. Communication infrastructure for products delivers notifications to inbox, email, SMS, push and chat via a single API, and supports workflows, digest batching and an embeddable UI component. Agent Communication Infrastructure connects agents you have already built to channels such as Slack, Teams, Telegram, WhatsApp and email through a single conversation model.

The README argues that people now expect conversations rather than one-way notifications, and positions Novu as the layer that saves teams from rebuilding inbox feeds, provider integrations and channel webhooks. Getting started starts with a free account, and the project links documentation, a changelog, a roadmap and a Discord community. It suits product and engineering teams that send notifications or build agents.

Apprise is a notification library and command-line tool that sends messages to a large number of services, including Telegram, Discord, Slack, Amazon SNS and Gotify, through one common syntax. Developers add the library once instead of researching and integrating each notification service separately.

A consistent URL format identifies each destination, and the same approach works from the CLI, from the Python library or through the Apprise API relay. It handles images and attachments for services that accept them, loads configuration files, supports custom notifications and hooks, and sends messages asynchronously for quick response times. Notification categories include productivity, SMS, desktop, email and custom services.

System administrators and DevOps engineers can use the bundled command line tool to send alerts from scripts and infrastructure without finding the right tool for each service. Apprise is written in Python, licensed under BSD-2-Clause, and distributed as a library and as a Docker image.