Physix Frontier · News Briefing Card (Hacker News · Oct 7, 2026)

Meta's Muse builds live profiles on 4M users

KEY FACTS

Meta's AI assistant Muse builds continuously updated personal profiles on 4 million users.
Muse refreshes profiles of users and their contacts every hour, logging relationship details.
People who don't use Muse still get pulled into the relationship graph through other users' Muse agents.
Muse topped the US App Store after launching last month, surpassing 5 million downloads.
Meta says users can ask Muse to forget information, but the original messages may still be visible.

KEY DATA

4MUsers

Over 5MDownloads

No. 1App Store rank

PHYSIX OBSERVATION

Muse turns social ties, emotional preferences, and even unspoken goals into computable profiles - far deeper than traditional ad targeting. Users think they're using an assistant; in reality they're being continuously mapped. Meta promises encryption by year's end, but the data is still used for product improvement today, and its transparency only means something to geeks. Ordinary users need a far more plain-spoken right to know.

Source: Hacker News report