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Comment on Ask HN: What could disrupt email?parent

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does Slack have an on premise option? because I think many corporate customers would definitely pay for it, despite all the cloud/saas hype. there are still orgs out there that dont want their comms outside their premises.

Zulip and Mattermost are alternatives that can be hosted (they're both open source software).

[0] https://about.mattermost.com/ [1] https://zulip.org/server.html

It's called IRC/Jabber + whatever web/GUI/CLI UI is desired. Many companies deploy it internally.

Having used team chats based on Jabber, IRC, Slack (in that chronological order), there is a huge difference. Jabber and IRC have always been pure chats, whereas Slack is the first chat platform where people actually use integrations and bots to a large extent. (Also, Jabber/IRC doesn't have /remind, my personal killer feature about Slack.)

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