Hangouts vs WhatsApp: What are the differences?
Developers describe Hangouts as "A communication platform *". It is a communication platform which includes messaging, video chat, and VOIP features. On the other hand, *WhatsApp** is detailed as "*A freeware, cross-platform messaging and Voice over IP service *". It is a cross-platform mobile messaging app for iPhone, BlackBerry, Android, Windows Phone and Nokia. It allows users to send text messages and voice messages, make voice and video calls, and share images, documents, user locations, and other media.
Hangouts belongs to "Web and Video Conferencing" category of the tech stack, while WhatsApp can be primarily classified under "Chatbot Platforms & Tools".