I use onlyoffice[0] because MS Office doesn't run on Linux. It is open source and seems to have the best compatibility with MS Office. You can self host it and/

I use onlyoffice[0] because MS Office doesn't run on Linux. It is open source and seems to have the best compatibility with MS Office. You can self host it and/or use it locally. It also integrates with e.g. nextcloud or seafile. Some features are missing yes, but the usability (IMO) is better than Libre-/OpenOffice. I don't know how good the collaboration is but they seem to advertise for it. [0] https://www.onlyoffice.com/ https://www.onlyoffice.com/