Mark Zuckerberg, Facebook’s chief executive, plans to integrate the social network’s messaging services — WhatsApp, Instagram and Facebook Messenger — asserting his control over the company’s sprawling divisions at a time when its business has been battered by scandals.

The move, described by four people involved in the effort, requires thousands of Facebook employees to reconfigure how WhatsApp, Instagram and Facebook Messenger function at their most basic levels. While all three services will continue operating as stand-alone apps, their underlying messaging infrastructure will be unified, the people said. Facebook is still in the early stages of the work and plans to complete it by the end of this year or in early 2020, they said.

Mr. Zuckerberg has also ordered all of the apps to incorporate end-to-end encryption, the people said, a significant step that protects messages from being viewed by anyone except the participants in the conversation. After the changes take effect, a Facebook user could send an encrypted message to someone who has only a WhatsApp account, for example. Currently, that isn’t possible because the apps are separate.

By stitching the apps’ infrastructure together, Mr. Zuckerberg wants to increase the utility of the social network, keeping its billions of users highly engaged inside its ecosystem. If people turn more regularly to Facebook-owned properties for texting, they may forgo rival messaging services, such as those from Apple and Google, said the people, who declined to be identified because the moves are confidential. If users interact more frequently with Facebook’s apps, the company may also be able to build up its advertising business or add new services to make money, they said.

New York Times