Top Alternatives to Hack Chat

Mattermost is an open-source, self-hosted platform for secure team collaboration, offering a Slack-alternative with emphasis on data control, privacy, and customizability. It provides a range of communication and project management tools for distributed and technical teams.

HipChat is a team collaboration tool offering real-time messaging, video conferencing, and file sharing for enhanced internal communication and project coordination.

eXo Platform is an open-source enterprise social collaboration platform designed to connect employees, share knowledge, and improve communication and productivity within organizations. It offers a comprehensive suite of tools including social networking, document management, project management, and real-time communication features.

Let's Chat is a self-hosted, open-source messaging application built for small to medium-sized teams. It provides persistent chat rooms, private messaging, and collaboration tools, prioritizing ease of deployment and control over your data.

Qiscus provides a comprehensive Communication Platform as a Service (CPaaS) offering robust chat, video call, and real-time collaboration features. It empowers businesses to integrate powerful communication capabilities into their applications and services.

Flock is a comprehensive communication and collaboration platform designed for teams. It streamlines workflow and enhances productivity through integrated messaging, project management tools, and seamless file sharing within a secure environment.

Fleep is a business communication platform designed for teams of all sizes, facilitating collaboration within and across organizations through a combination of chat, task management, and file sharing.

Campfire is a web-based team collaboration and communication tool designed for real-time group chat and project-based communication. It simplifies online collaboration through dedicated chat rooms, file sharing, and integration with various business applications.

Flowdock is a collaborative team workspace combining group chat, inbox, and integrated tool notifications. It streamlines communication and information flow for agile teams, connecting conversations with project management and code development tools like GitHub, Jira, and Trello.

Gitter is a free and open-source instant messaging and chat service designed specifically for developers and users of GitHub projects. It provides real-time communication within the context of software development teams and communities.