Mattermost is an open-source messaging platform that allows for secure team collaboration. You can create intuitive workflows and collaborate across large groups without worrying about data privacy or security. You can quickly get up and running with hundreds of pre-built integrations or create custom workflows that can scale to thousands of concurrent users. Mattermost connects people, tools and automation to improve collaboration. This is how many of the world's most privacy-conscious companies work. Mattermost is used by DevOps teams to facilitate collaboration at all stages of the DevOps process. Mattermost combines people, tools, and automations to enable your team to increase innovation and agility. Mattermost is an open-source Slack alternative. It is written in Golang, React and runs as one Linux binary with MySQL and PostgreSQL. Access the source code and enjoy the features you love (file sharing, real time group chat, and webhooks to name a few).