Skype vs WhatsApp

Skype is a software application that allows users to make voice and video calls and chats over the Internet. Calls to other users within the Skype service are free, while calls to both traditional landline telephones and mobile phones can be made for a fee using a debit-based user account system. Skype has also become popular for its additional features which include instant messaging, file transfer, and videoconferencing. Skype alternative for enterprise is called Skype for Business. Secure Skype alternatives are Signal and Telegram.
WhatsApp Messenger is a cross-platform mobile messaging app which allows you to exchange messages without having to pay for SMS. WhatsApp Messenger is available for iPhone, BlackBerry, Android, Windows Phone and Nokia and yes, those phones can all message each other! Because WhatsApp Messenger uses the same internet data plan that you use for email and web browsing, there is no cost to message and stay in touch with your friends. Secure WhatsApp alternatives are Signal and Telegram.
WhatsApp has better video than Skype

2018 - WhatsApp launches its app for business to take on Skype

WhatsApp today officially launched its new WhatsApp Business app in select markets, including Indonesia, Italy, Mexico, the U.K. and the U.S., ahead of its planned worldwide rollout.  Aimed at smaller businesses, the free app – Android-only for now – helps companies better connect with their customers and establish an official presence on WhatsApp’s service. Essentially, it’s the WhatsApp version of a Facebook Page. With the new app arriving today, small companies can set up their WhatsApp Business profiles by filling out information like a business description, email, address and website. The conclusion is that WhatsApp becomes more business-friendly than Skype

2016 - WhatsApp launched desktop version for Mac and Windows. Skype is in panic

WhatsApp has launched desktop clients for Mac and Windows. People who have already been using WhatsApp on their web browsers will find that software isn’t significantly different. The desktop app is an extension of your phone app, with all messages synced between devices. Giving power users who rely on WhatsApp for work communications, desktop options helps it competes against other messaging services, like iMessenger, WeChat, and Skype. WhatsApp is currently testing out B2C accounts, which would give it a new revenue source after dropping its 99 cent annual subscription fee.