WhatsApp added an incognito mode for Meta AI conversations, and the implementation is cleaner than most "privacy" features you see from large platforms. Turn it on and your conversation with the AI doesn't get saved to Meta's servers. Messages disappear by default when you close the chat - no history, no record.
The practical use case is obvious. Not every question you want to ask an AI assistant belongs attached to your account permanently. Health questions, personal financial decisions, anything sensitive enough that you'd reach for a private browser window - incognito mode handles these without requiring you to open a separate app or service.
A few things to know about how this works in practice. Because conversations aren't saved, there's no memory across incognito sessions. Each new incognito chat starts from scratch. If you're working through a multi-session problem, you'll need standard mode instead. Meta also hasn't detailed whether incognito conversations are still subject to safety monitoring or any backend processing - most platforms retain some visibility into conversations even when the save toggle is off. If that distinction matters for your situation, read Meta's privacy documentation directly before relying on it.
For WhatsApp's roughly 3 billion users, this fills a real gap. The app has become a default AI entry point for many people simply because it's already installed and open. Adding a privacy layer acknowledges that not all AI conversations are created equal - some of your most useful queries are exactly the ones you'd prefer disappeared the moment you close the window.