A Facebook owned campany, Whatsapp finally introduced support for Audio and Video calling on Web and Desktop Client. Announced via official blog post
To make desktop calling more useful, Whatsapp made sure it works seamlessly for both portrait and landscape orientation, appears in a resizable standalone window on your computer screen, and is set to be always on top so you never lose your video chats in a browser tab or stack of open windows.
Voice and video calls on WhatsApp are end-to-end encrypted, so WhatsApp can’t hear or see them, whether you call from your phone or your computer. We’re starting with one-to-one calls on the WhatsApp desktop app so we make sure we can give you a reliable and high-quality experience. We will be expanding this feature to include group voice and video calls in the future
Whatsapp For Desktop: Microsoft store
Whatsapp Web: Link