Gotify source
Notification server with Android and CLI clients (alternative to PushBullet).
Home / communication-custom-communication-systems / Novu
12 self-hosted alternatives to Novu (2026)
Notification infrastructure for developers.
Rocket.Chat source
Communications platform that puts data protection first (alternative to Gitter.im and Slack).
Tiledesk source
All-in-one customer engagement platform from lead-gen to post-sales, from WhatsApp to your website. With omni-channel live agents and AI-powered chatbots (alternative to Intercom, Zendesk, Tawk.to and Tidio).
Typebot source
Conversational app builder (alternative to Typeform and Landbot).
AnyCable source
Realtime server for reliable two-way communication over WebSockets, Server-sent events, etc.
Apprise
Apprise allows you to send a notification to almost all of the most popular notification services available to us today such as: Telegram, Discord, Slack, Amazon SNS, Gotify, etc.
Centrifugo source
Language-agnostic real-time messaging (Websocket or SockJS) server.
Chitchatter source
Peer-to-peer chat app that is serverless, decentralized, and ephemeral.
Conduit source
A simple, fast, and reliable chat server powered by Matrix.
Continuwuity source
Community-driven Matrix homeserver, the continuation of conduwuit focusing on user experience and new features (fork of Conduit).
Databag
Federated, end-to-end encrypted messaging service for the web, iOS, and Android, supporting text, photos, video, and WebRTC video and audio calls.
Element source
Fully-featured Matrix client for Web, iOS & Android.