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A new legal challenge is barreling toward Meta Platforms Inc. like a data breach in slow motion, with an international coalition of plaintiffs accusing the tech giant of misleading the public about the privacy and security of WhatsApp Messenger.

Filed Friday in U.S. District Court in San Francisco, the Meta WhatsApp privacy lawsuit targets Meta and senior executives, alleging that the company paints an illusion of secrecy while retaining sweeping access to user communications around the world.

Plaintiffs say privacy promises ring hollow

The plaintiffs argue that Meta’s public assurances about WhatsApp’s privacy are more marketing gloss than reality. According to the complaint, Meta and its messaging service “store, analyze, and have access to virtually all so-called ‘private’ messages,” despite repeated claims that chats are shielded from prying eyes.

Like a locked vault with too many spare keys, the suit contends that WhatsApp’s end-to-end encryption does not fully bar internal access. The plaintiffs allege that Meta can reach message content through employees, internal tools and systems, undermining the promise that only senders and recipients can read messages.

The filing references unnamed whistleblowers, whose identities remain undisclosed, as sources for claims that Meta’s internal practices contradict its public statements.

A global cast of plaintiffs

Those bringing the case span five continents, including representatives from Australia, Brazil, India, Mexico and South Africa. Together, they argue that Meta not only stores user message content but also may access it, placing billions of users at risk of unseen surveillance.

Meta pushes back, calls suit a fabrication

Meta swiftly rejected the allegations, describing the case as legally groundless and vowing to seek sanctions against the plaintiffs’ attorneys.

“Any claim that WhatsApp messages are not encrypted is categorically false and absurd,” said Andy Stone, a Meta spokesperson. “WhatsApp has been using end-to-end encryption based on the Signal protocol for ten years. This lawsuit is a baseless fabrication.”

The company has long touted encryption as the digital equivalent of a sealed envelope, unreadable to anyone outside the conversation.

Regulators circle as scrutiny grows

Beyond the courtroom, pressure on Meta continues to mount. Britain’s media regulator, Ofcom, has opened an investigation into information Meta provided about WhatsApp during one of its market studies, according to other sources.

The regulatory probe underscores a broader global push to force major technology companies to lift the curtain on how user data is handled and how secure private communications truly are. As lawmakers and watchdogs probe deeper, the Meta WhatsApp privacy lawsuit adds fuel to an already smoldering debate over trust, transparency and the real meaning of “private” in the digital age.