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by northwest 4686 days ago
Not sure if they already allow having your own domain, but the rest is covered: https://mykolab.com/ based in non-EU country Switzerland. Of course it's not free, but keep in mind: if it's free, you are probably the product being sold.

If you need to use your own domain, set up your own server or VPS and install https://kolab.org/ (it's all listed on https://prism-break.org/)