Mattermost: Free Open-source Alternative to Slack

Mattermost: Free Open-source Alternative to Slack

In today's fast-paced digital world, efficient communication within teams is paramount. Many organizations rely on platforms like Slack for this purpose. However, with rising concerns over cost, data privacy, and customization, open-source alternatives like Mattermost are gaining traction.

Mattermost offers robust features, flexibility, and an open-source model, making it a compelling choice for businesses and teams of all sizes. This article delves into the various aspects of Mattermost, showcasing why it stands out as a premier alternative to Slack.

Watch our Mattermost platform overview

Communication Platform

Mattermost provides a powerful communication platform designed to streamline team collaboration. Similar to Slack, it offers channels for team conversations, direct messaging, and group chats. What sets Mattermost apart is its high degree of customization. Users can tailor the platform to fit their specific needs, integrating it seamlessly with existing workflows. The interface is intuitive, ensuring a smooth user experience, and supports rich text formatting, file sharing, and multimedia attachments.

Moreover, Mattermost's open-source nature means organizations can host it on their own servers, giving them complete control over their data. This is a significant advantage for companies with strict compliance and security requirements.


One of the standout features of Mattermost is its Playbooks. Playbooks are predefined processes that can be executed within the platform, streamlining repetitive tasks and ensuring consistency across projects. They are particularly useful for incident response, project management, and onboarding processes.

With Playbooks, teams can document and automate their workflows, reducing the potential for human error and enhancing efficiency. The Playbooks feature supports real-time collaboration, allowing team members to contribute and update processes as needed. This flexibility ensures that Playbooks remain relevant and effective, adapting to the evolving needs of the team.


Incorporating artificial intelligence into communication platforms can significantly enhance productivity, and Mattermost is no exception. Mattermost leverages AI to provide smart suggestions, automate routine tasks, and offer insights into team interactions. These AI-driven features help in managing workloads, identifying bottlenecks, and optimizing team performance.

For instance, AI can be used to prioritize messages, suggest relevant channels or Playbooks, and even predict potential issues before they escalate. This proactive approach enables teams to stay ahead of challenges, ensuring smooth and efficient operations.


Security is a critical concern for any communication platform, and Mattermost excels in this area. As an open-source solution, it allows organizations to scrutinize the code and ensure there are no vulnerabilities. Additionally, hosting Mattermost on-premises means companies have full control over their data, reducing the risk of third-party breaches.

Mattermost supports end-to-end encryption, multi-factor authentication, and single sign-on (SSO) to safeguard communications. Regular security audits and a transparent development process further enhance the platform's reliability. These features make Mattermost a trusted choice for organizations with stringent security requirements.


Mattermost emerges as a robust, flexible, and secure alternative to Slack, offering a comprehensive communication platform tailored to meet the needs of modern teams. Its open-source nature, coupled with advanced features like Playbooks and AI integration, makes it an excellent choice for organizations seeking control, customization, and efficiency.

Start using Mattermost with Elestio