LibreOffice is offline; each person can run the software in their own device to create and edit documents.

It’s features are equivalent to 2010 Office. That’s not necessarily bad, but it’s not how people usually work today.

Collabora lets you host documents on a central server and have multiple people edit at once, dynamically tracking changes and allowing full revision management. Or, you can keep your documents local and not host them if you don’t want to.