The awful crappy dependency hell of a thing they call an API. API integrations are possible over at Discord. It can be intergrated with discord to work with clients who only want to use slack or even any other platform. I still use slack, although I prefer discord. Here's a link to Mattermost's open source repository on GitHub.Īccording to the StackShare community, Slack has a broader approval, being mentioned in 4795 company stacks & 3481 developers stacks compared to Mattermost, which is listed in 38 company stacks and 24 developer stacks. Mattermost is an open source tool with 15.4K GitHub stars and 3.14K GitHub forks. 'Open source' is the primary reason why developers consider Mattermost over the competitors, whereas 'Easy to integrate with' was stated as the key factor in picking Slack. Autocomplete makes mentioning your teammates quick and painless.Create open channels for the projects, groups and topics that the whole team shares.On the other hand, Slack provides the following key features: Installs with Linux binary, plus Docker, Heroku, AWS, Azure and Cloud Foundry options Self-host ready with System Console and IT admin tools for managing dozens of team sites.Offers Slack-compatible webhooks and integrations including Hubot, Jenkins, GitLab and others Imports Slack channels, users and themes. All your team communication in one place, searchable and accessible anywhere.Some of the features offered by Mattermost are: Mattermost and Slack can be categorized as 'Group Chat & Notifications' tools. And everything from Twitter, Dropbox, Google Docs, Asana, Trello, GitHub and dozens of other services. Imagine all your team communication in one place, instantly searchable, available wherever you go. What is Slack? Bring all your communication together in one place. Mattermost is modern communication from behind your firewall. What is Mattermost? Open-source, self-hosted, Slack alternative. Mattermost vs Slack: What are the differences?

Mattermost slack