GitLab Mattermost, an open source on-premises Slack alternative

GitLab has announced the integration of GitLab Mattermost, an open-source, on-premises messaging app similar to Slack, into its Omnibus packages starting with GitLab 7.14. Designed to enhance internal communication for remote companies, GitLab Mattermost addresses the need for on-premises software due to security and control concerns, as Slack does not offer such a version. By collaborating with the Mattermost team, GitLab has facilitated the integration of PostgreSQL support and OAuth login to connect with GitLab's OAuth provider. This move ensures that Mattermost can be easily installed via the Omnibus package, though it remains in an alpha state with planned security audits and a beta release targeted for GitLab 8.0. The integration is expected to provide a seamless setup with minimal package size increase and includes future plans to improve interactivity between GitLab, GitLab CI, and GitLab Mattermost.

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