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Best FOSS alternatives to Slack/Discord?
(hexbear.net)
On the road to fully automated luxury gay space communism.
Spreading Linux propaganda since 2020
Rules:
It depends. Are you doing this for an organization? If so, mattermost is a very good option if you want good, concrete division between topics and a slack-based UI. If you want 1:1 or small group communication between people who know each other, Signal is the gold standard. If you really need privacy or are doing 1:1 communication with people you don't know, use Briar. If you want cost over all else, matrix is very resource intensive and XMPP is a better choice. What do you want to do and who do you want to talk to?