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Viber and WhatsApp are both are instant messaging apps with variety of features . Lets Let's see a differential analysis of the two .

Founded in 2009 by .Brian Acton and Jan Koum, both former employees of Yahoo! | Founded by Israeli and Belarusian partners: Talmon Marco, Igor Magazinnik, Sani Maroli and Ofer Smocha, with Marco as its CEO.Owned by Facebook Inc. | Owned by Viber Media . WhatsApp is available for '''smartphones''' (Windows Phone , Android , Symbian , iOS ,Blackberry OS, and Tizen ) , and can also be accessed on the '''web''' . | Viber is available for '''desktop'''(Windows , OS X , Unix-like, Bada , and Linux) , '''smartphones''' (Windows Phone , Android , Symbian , iOS ,and Blackberry OS ) , but cannot be accessed on the web. There is a subscription amount free for WhatsApp of $1 after one year. | Viber is free without any subscription . However , Viber provides premium icons for users , which have to be paid for .Whatsapp WhatsApp is built on the '''Erlang''' programming language . | Written in C/C++/Python (desktop, using SIP and Qt frameworks), Objective-C (iOS), and Java (Android).Available in 32 Languages . | Available in 30 languages .WhatsApp's user base is more. | It Viber has less users as compared to WhatsappWhatsApp.