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> Zulip (open core) Isn't Zulip fully open source? That's what they say on their site: https://zulipchat.com/ https://zulipchat.com/

• rishig 8y ago
  yup, Zulip is fully open source. I believe Mattermost is actually open core.
• rst 8y ago
  Apparently so. I misread the website; their "Enterprise" support package offers better support, but no extra features.