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WhatsApp Advanced Chat Privacy

Advanced Chat Privacy is a WhatsApp user-facing feature — introduced separately from Private Processing — that provides per-chat opt-outs for AI-related functionality, including preventing AI features (e.g. the @Meta AI mention / Meta AI invocations) from being used within a chat. Official announcement: blog.whatsapp.com/introducing-advanced-chat-privacy.

Role in the Private Processing architecture

Advanced Chat Privacy is named in the 2025-04-30 Private Processing post as the user-control mechanism that composes with Private Processing's confidentiality guarantees:

"For people's most sensitive chats that require extra assurance, they must be able to prevent messages from being used for AI features like mentioning Meta AI in chats, with the help of WhatsApp's Advanced Chat Privacy feature."

The composition:

• Advanced Chat Privacy — per-chat opt-out. "Don't let AI touch this conversation at all."
• Private Processing — per-request infrastructure. "If AI does touch something, it runs in a TEE that even Meta can't look inside."

Together they give the user two layers of control: chat-granularity (this chat is off-limits) on top of request-granularity (even when on, no plaintext exposure).

Seen in

• sources/2025-04-30-meta-building-private-processing-for-ai-tools-on-whatsapp — named as the user-control composition point.

Related

• systems/whatsapp-private-processing — the infrastructure-layer companion.
• concepts/end-to-end-encryption — WhatsApp's baseline invariant that both features exist to protect.