

Acton encouraged him to wait for a "few more months". However, when early versions of WhatsApp kept crashing, Koum considered giving up and looking for a new job. On February 24, 2009, he incorporated WhatsApp Inc. Koum named the app WhatsApp to sound like "what's up".

Fishman visited, found Russian developer Igor Solomennikov, and introduced him to Koum. They realized that to take the idea further, they would need an iPhone developer. In January 2009, after purchasing an iPhone and realizing the potential of the app industry on the App Store, Koum and Acton began visiting Koum's friend Alex Fishman in West San Jose to discuss a new type of messaging app that would "show statuses next to individual names of the people". WhatsApp was founded in by Brian Acton and Jan Koum, former employees of Yahoo!. It has become the primary means of electronic communication in multiple countries and locations, including Latin America, the Indian subcontinent, and large parts of Europe and Africa. It became the world's most popular messaging application by 2015, and has over 2 billion users worldwide as of February 2020. of Mountain View, California, which was acquired by Facebook in February 2014 for approximately US$19.3 billion. The client application was created by WhatsApp Inc. In January 2018, WhatsApp released a standalone business app targeted at small business owners, called WhatsApp Business, to allow companies to communicate with customers who use the standard WhatsApp client. The service requires users to provide a standard cellular mobile number for registering with the service. WhatsApp's client application runs on mobile devices but is also accessible from desktop computers, as long as the user's mobile device remains connected to the Internet while they use the desktop app. It allows users to send text messages and voice messages, make voice and video calls, and share images, documents, user locations, and other media. WhatsApp Messenger, or simply WhatsApp, is an American freeware, cross-platform messaging and Voice over IP (VoIP) service owned by Facebook, Inc.
