chat

Rocket.Chat is an open-source, fully customizable communications platform for organizations with high standards of data protection, offering team collaboration, omnichannel customer service, and a complete messaging solution.

Novu is an open-source notification infrastructure that provides a unified API for sending notifications across multiple channels including Email, SMS, Push, and Chat. It offers an embeddable notification center, workflow engine, and no-code email editor.

Mattermost is an open source platform for secure collaboration across the entire software development lifecycle. It provides team messaging, file sharing, project management and integrations in a self-hosted environment.

Zulip is a powerful open-source team chat application that combines the immediacy of real-time chat with the organization of email-style threading, designed for productive team collaboration.

Element is a secure and decentralized communication client for the Matrix network. It provides end-to-end encrypted messaging, voice/video calls, file sharing, and collaboration features with a focus on privacy and security.

Tinode is an instant messaging platform with a Go backend and clients for iOS, Android, web, and command line, designed for building chat applications with modern features.

Tailchat is a next-generation noIM application for your workspace, designed to be more than just another Slack/Discord clone with its plugin system and modern architecture.

Chitchatter is a free, peer-to-peer, end-to-end encrypted communication tool designed for private and secure messaging. It offers serverless, decentralized, and ephemeral chat with features like video calls, screen sharing, and file transfers.

Revolt is an open-source, self-hostable chat platform designed as a privacy-focused alternative to Discord, featuring text/voice channels, customizable servers, and a familiar user interface without compromising on user privacy.

SAMA is a next-generation self-hosted chat server and clients platform that provides modern messaging capabilities with complete control over your data and infrastructure.