Best Free Internal Communications Software
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Compare the Top Free Internal Communications Software as of November 2025
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What is Free Internal Communications Software?
Internal communications software is a type of technology that assists organizations in staying connected. It helps facilitate collaboration between members by providing a secure environment to share information, documents, and data. It also provides instant messaging and other communication tools that make it easier for colleagues to communicate with one another. Many internal communications tools include features like custom notifications, task management, and document sharing to further streamline the process of collaborating on projects or tasks. Compare and read user reviews of the best Free Internal Communications software currently available using the table below. This list is updated regularly.
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Mattermost
Mattermost
Mattermost is a flexible, open source messaging platform that enables secure team collaboration. Build intuitive workflows and collaborate across large teams without worrying about security or data privacy. Get up and running quickly with hundreds of existing integrations, or build out custom workflows that scale to tens of thousands of concurrent users. Many of the world’s leading privacy-conscious enterprises work better with Mattermost by connecting people, tools, and automation to increase collaboration. DevOps teams use Mattermost to power collaboration at every stage of the DevOps lifecycle. Mattermost unifies people, tools, data, and automations to help your team increase innovation and agility. Mattermost is an open source Slack alternative. It's written in Golang and React and runs as a single Linux binary with MySQL or PostgreSQL. Use the features you like (file sharing, real-time group chat and webhooks—to name a few) and access the source code.Starting Price: $3.25 per user per month
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