Mattermost is an open source, self-hosted Slack-alternative. We use Slack at work (for one of our groups) and I generally like it but it's expensive. I really like this alternative for personal use.
Mattermost is an open source, self-hosted Slack-alternative. We use Slack at work (for one of our groups) and I generally like it but it's expensive. I really like this alternative for personal use.