Meta faces market shifts, privacy concerns, and Amazon block as Muse AI agent tops download charts

Consumer adoption and market reaction

Meta released its personal artificial intelligence agent, Muse, on 8 September 2026 under the leadership of Alexandr Wang, whom the company hired to lead AI efforts last year. The application allows users to delegate routine tasks such as shopping, travel reservations, and form-filling via a conversational interface. Within two weeks of release, Muse recorded 2.8 million downloads, generating an average daily download growth rate of 55% over its first 10 days according to Sensor Tower. The uptake pushed Muse past ChatGPT as the top free application on Apple's App Store and Google Play Store across the United States and Canada. The release triggered stock declines across financial, insurance, and service providers exposed to automated price comparisons. Michael O'Rourke, chief market strategist at JonesTrading, described the commercial landscape created by the tool.

Meta has really found lightning in a bottle here and someone who partners with Muse is likely to be a clear beneficiary off the bat to me. As far as net losers, it's just going to take more time to find out.

E-commerce pushback and financial concerns

Stocks across several industries dropped this week as investors evaluated Muse's automated comparison-shopping capabilities. Planet Fitness shares fell 17%, The New York Times dropped 10%, Arthur J. Gallagher declined 4.6%, and Marsh slipped 2.4%. JPMorgan and Wells Fargo dropped more than 3% each, while travel platforms Booking Holdings and TripAdvisor fell over 6%. Amazon blocked Muse from accessing its online marketplace after finding that the agent browsed accounts and processed transactions on behalf of users without prior commercial authorization. Six large banks also requested clear industry rules governing liability, fraud detection, and transaction disputes arising from automated purchases. Amazon stated that third-party tools should operate transparently and respect retailer autonomy.

Third-party applications that shop on behalf of customers should operate openly and respect each provider's decision on whether they want to participate.

Privacy questions and data syncing

Technical evaluations and user experiences revealed operational friction regarding how Muse accesses and handles user data. Inc writer Jason Aten reported that Muse accessed and synced thousands of personal text messages to Meta's servers without explicit user permission, subsequently offering inaccurate explanations about notification scraping. Meta stated that Muse runs on isolated cloud computers for each user, stores data separately, and does not use chat interactions for targeted advertising. The company also announced plans to offer user-held encryption keys for entire virtual computer environments. A security researcher found that Muse could be manipulated into forwarding user audio recordings to external destinations.

Human contractor calling rollback

Meta Superintelligence Labs rolled back a phone calling feature that utilized human contractors to complete calls when automated voice systems failed. Internal testing showed that businesses frequently disconnected calls upon learning they were speaking with an artificial system, prompting Meta to test human concierges. A Meta vice president confirmed the rollback after an employee reviewing a test transcript reported that a human contractor made a racist remark during a call. The executive stated that involving human contractors increased call completion rates into the high 90% range compared to lower rates for automated calls. The company terminated its relationship with the involved contractor and ended human intervention testing for the calling feature.