Marco commented that Viber allows instant calling and synchronization with contacts because the ID is the user's cell number, unlike Skype which is modeled after a 'buddy list' requiring registration and a password. Sani Maroli and Ofer Smocha soon joined the company as well. The company was run from Israel, with much of its development outsourced to Belarus in order to lower labor costs. Marco and Magazinnik are also co-founders of the P2P media and file-sharing client iMesh. Viber Media was founded in Tel Aviv, Israel, in 2010 by Marco and Magazinnik, who are friends from the Israel Defense Forces where they were chief information officers.

Trying to overcome this issue, Marco turned to his friend Igor Magazinnik to find a solution. Living apart but communicating all the time led to very expensive phone bills. Co-founder Talmon Marco's girlfriend at the time was based in Hong Kong while he was living out in New York City. Viber was founded in 2010 to solve the problem of long-distance relationships.

Viber's offices are located in London, Manila, Moscow, Paris, San Francisco, Singapore, and Tokyo. Since 2017, its corporate name has been Rakuten Viber. The software was developed in 2010 by Cyprus-based Viber Media, which was bought by Rakuten in 2014. As of 2018, there are over a billion registered users on the network.

In addition to instant messaging it allows users to exchange media such as images and video records, and also provides a paid international landline and mobile calling service called Viber Out. Users are registered and identified through a cellular telephone number, although the service is accessible on desktop platforms without needing mobile connectivity. Viber, or Rakuten Viber, is a cross-platform voice over IP (VoIP) and instant messaging (IM) software application owned by Japanese multinational company Rakuten, provided as freeware for the Google Android, iOS, Microsoft Windows, Apple macOS and Linux platforms. It may require cleanup to comply with Wikipedia's content policies, particularly neutral point of view. A major contributor to this article appears to have a close connection with its subject.

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