If you are searching for the best free video conferencing software for Windows 11/10 ... the former is a paid software. Skype for home allows video calling, screen sharing, and voice calling.

You can call a person both on Skype as well as on their mobile phone and landline telephones. TIP: You can also Change or Blur Background in Skype Video calls. There’s a new ‘Meet Now ...

Skype for Business is also available in web and Windows 10 Mobile versions ... which allows video free calling with up to 10 people (but doesn't include additional collaboration features).