Gitter vs Mattermost: What are the differences?
Gitter: Messaging for people who make software. Integrated with your team, projects and your code. Free chat rooms for your public repositories A bit like IRC only smarter. Chats for private repositories as well as organisations.; Mattermost: Open-source, self-hosted, Slack alternative. Mattermost is modern communication from behind your firewall.
Gitter and Mattermost can be categorized as "Group Chat & Notifications" tools.
Some of the features offered by Gitter are:
- Know who's seen any message
- Edit messages after you've sent them
- Full emoji support
On the other hand, Mattermost provides the following key features:
- All your team communication in one place, searchable and accessible anywhere
- Slack-compatible, not Slack-limited. Imports Slack channels, users and themes. Offers Slack-compatible webhooks and integrations including Hubot, Jenkins, GitLab and others
- Self-host ready with System Console and IT admin tools for managing dozens of team sites. Installs with Linux binary, plus Docker, Heroku, AWS, Azure and Cloud Foundry options
"Github integration" is the primary reason why developers consider Gitter over the competitors, whereas "Open source" was stated as the key factor in picking Mattermost.
Mattermost is an open source tool with 14.9K GitHub stars and 3.04K GitHub forks. Here's a link to Mattermost's open source repository on GitHub.
According to the StackShare community, Gitter has a broader approval, being mentioned in 25 company stacks & 41 developers stacks; compared to Mattermost, which is listed in 38 company stacks and 24 developer stacks.