Meta Platforms’ new personal AI agent, Muse, is driving a sharp rise in investor interest after early download figures suggested stronger consumer adoption than ChatGPT saw during its comparable launch period.
Meta shares jumped 11.3% on September 21 to close at $741.25, adding about $192 billion to the company’s market capitalization. The rally also increased CEO Mark Zuckerberg’s net worth by more than $13 billion, according to Yahoo Finance.
Muse was launched by Meta on September 8 as an AI agent designed to perform tasks rather than simply answer questions. It can send emails, book travel, browse the web, complete transactions and continue working on tasks after a user closes the application. Meta says the service operates through a dedicated secure virtual machine.
Muse gains early traction
Sensor Tower data cited by Yahoo Finance showed Muse reached 2.8 million downloads in its first 12 days across the U.S. and Canada. On a comparable 12-day basis, Muse recorded 1.8 million downloads versus 1.3 million for ChatGPT, according to the report.
READ: Meta’s Muse AI assistant tops 83,000 US iOS downloads after launch (September 11, 2026)
Muse also recorded 264,000 U.S. downloads on September 19, its third consecutive day above 200,000 downloads. The app reached the top position on Apple’s App Store during the surge in attention.
Reuters separately reported that Muse is available on iOS and Android in the U.S. and Canada and offers a free basic version alongside subscription plans priced at $20 and $100 per month for heavier use.
Why investors are watching Muse
The market reaction is tied less to current Muse revenue than to its potential as a new monetization channel for Meta.
Evercore ISI analyst Mark Mahaney said Muse could create opportunities across advertising, subscriptions and transaction revenue. His analysis also pointed to the possibility of Meta using Muse to enter the broader enterprise AI market, where Microsoft and other technology companies have established revenue streams.
Reuters reported that Wall Street analysts are similarly examining whether Muse can develop into a new revenue engine for Meta. J.P. Morgan said early adoption suggested potential for Muse to become a widely used consumer AI application, while Bank of America researchers said early reviews pointed to interest in its ability to perform multi-step tasks with limited user intervention.
READ: Meta launches Muse AI in US: What the new personal agent can do for users (September 9, 2026)
Meta says Muse is intended to work across everyday activities, including email, travel, shopping and other online tasks. The company also says users control which applications Muse can access and can disconnect services or opt out of having their interactions used to train Meta’s AI models.
A new test for Meta’s AI spending
The enthusiasm around Muse comes as Meta continues to spend heavily on artificial intelligence infrastructure. The company is betting that AI can generate new engagement and revenue opportunities across its massive user base.
For investors, the key question is whether Muse’s early download momentum translates into sustained usage and eventually meaningful revenue. The initial figures show rapid adoption, but they do not yet establish how frequently users will rely on the agent or how much they will pay for additional capabilities.