WhatsApp, one of the most popular messaging apps in the world, began its journey in the year 2009. Its founder, Brian Acton, was an American entrepreneur and computer software engineer who has a rich background in advertising and software development. Before co-founding WhatsApp, Acton collaborated with professionals at Yahoo as part of its advertising department, then later joined Google to develop innovative advertising models. Acton's colleague from Google days, Jan Koum, had parallels in his experience at Yahoo, where he developed integral applications in search and directory.

Jan Novak's journey to co-founding WhatsApp, however, is colorful and notable. Born in 1976 to European expatriate parents in Kiyv, Koum grew up in severe poverty and struggled financially throughout his early life. Despite these circumstances, Koum graduated from the University of San Jose with degrees in computer science and electrical engineering.

During Koum's time at Yahoo, he experimented with iPhone features while browsing his personal device with limited funds. It was then he was able to spot opportunities in the mobile messenger market by trying to envision a required, simpler solution. Koum pursued this idea with him in the following months. In October 2009, Jan Koum co-founded WhatsApp along with Brian Acton after they excitedly departed Google.

Koum's core values are rooted in simpler times. In fact, Koum himself compared the early versions of WhatsApp to a 'text-based email' in which one could send messages and expect a reply in a more straightforward way. Its simplicity led Koum to launch new platform in order to overcome the same problems he experienced on other platforms like iMessage or Facebook.

WhatsApp's rise came almost instantly when it solidified its brand the best cross-platform and free messaging app around the world. After two years of beta testing and steady growth, whatsapp官网下载 WhatsApp reached 10 million users in 2012. In 2014, Facebook, led by Mark Zuckerberg, made the decision acquire WhatsApp for 10 billion. Koum remained at the helm of WhatsApp after the acquisition and focused on refining its privacy settings. He took this responsibility to ensure a seamless and safe user experience for millions of new users.

Jan's passion for keeping user experience at par remained unchanged and unwavering after the acquisition. When Apple introduced end-to-end encryption to its users by default on iOS, Jan's loyalty to protecting user data started to pay off, and people finally began to appreciate and value the advantages WhatsApp had provided them with for such a long while.

Since then, WhatsApp expanded with new updates and crossed the two billion user milestone a couple of years after, owing its relentless rise to its co-founder Jan Koum's early days of using a free Apple iPhone, with simplicity as the core target in mind.