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WhatsApp

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WhatsApp is a major global social media and instant messaging service. It also provides Voice over IP, or VoIP, which allows users to make voice and video calls over the internet. Owned by Meta Platforms, the app is accessible through mobile and desktop applications. Users can exchange text, voice, and video messages. They can also share images, documents, and their geographic locations. To use the service, a person must register using a cellular mobile telephone number.

The app's development began with a simple concept. Originally, it was intended to be a status update tool. It would show if a contact was busy, at work, or on a call. The turning point came when Apple introduced push technology. This technology allowed the app to send notifications even when it was not actively being used. Users began using these status updates to send short, jokey messages to one another. This shift transformed the app from a status tool into an instant messaging service. Later, developers added features like photo sharing and dedicated messaging components.

WhatsApp has undergone several distinct stages of growth and evolution. It started as a small tool for iPhone users in 2009. It soon expanded to include BlackBerry, Symbian OS, and Android platforms. In 2016, the company removed its $1 annual subscription fee. This change removed a financial barrier for users without credit cards. Another major stage was the launch of WhatsApp Business. This standalone app helps small businesses communicate with customers. By 2023, this business version had approximately 200 million monthly users.

The history of the company is tied to its founders, Brian Acton and Jan Koum. Both men were former employees of Yahoo. In early 2009, Koum purchased an iPhone and began brainstorming ideas with Acton. They held discussions at the home of their friend, Alex Fishman, in West San Jose. To build the app, they worked with a developer named Igor Solomennikov. The name WhatsApp was chosen because it sounds like the phrase "what's up." In February 2014, Facebook acquired WhatsApp Inc. for approximately $19.3 billion. This was the largest acquisition of a venture-capital-backed company in history at that time.

The scale of WhatsApp is immense. By 2015, it had 900 million users and became the world's most popular messaging app. By February 2020, the number of active users exceeded 2 billion. As of May 2025, the service reached 3 billion monthly active users. In 2015 alone, the app was processing over 30 billion messages every day. These numbers show how much the app has changed the way people communicate globally.

WhatsApp has been involved in many notable and sometimes controversial events. In 2016, the European Commission fined Facebook €110 million. This was because Facebook provided misleading information regarding the ability to combine user data from WhatsApp and Facebook. In 2021, a new privacy policy caused many users to move to competitors like Signal and Telegram. Additionally, the app has been used for important global efforts. In 2020, WhatsApp partnered with the World Health Organization and UNICEF. They provided messaging hotlines to share information about the COVID-19 pandemic.

Today, WhatsApp connects to many different global systems. It has become a primary means of internet communication in the Americas, the Indian subcontinent, and parts of Europe and Africa. It also integrates with commerce and public health. In India, users can use the app to shop for groceries through an integration with JioMart. The service is also moving toward interoperability. This means it may soon allow users to communicate with other third-party messaging services.

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