Meta's Muse agent provides every user with a complete cloud computer running Ubuntu Linux

Meta's Muse app quietly ships something unusual for a consumer AI product: every user gets a free, full-featured cloud computer. David Singleton, VP of Engineering at Meta Superintelligence Labs and former CTO of Stripe, says the virtual machine runs a complete Ubuntu Linux image where users can install software, write and compile code, or browse the web — essentially anything they would do on a physical machine under their desk. The approach mirrors what competitors are doing behind the scenes: users recently found that ChatGPT's "Work" mode also runs its own virtual machine, with 15 GB of RAM and more than nine CPU cores.

How the Security Architecture Works

Muse's setup, which Singleton calls the "Muse Secure VM," separates the workspace from sensitive system components. Users and their Muse agent operate inside a "Runtime Cell," where activity is unrestricted. Outside that cell, a "Sentinel" process monitors sensitive actions, and passwords and credentials are stored outside the cell entirely.

The Runtime Cell has its own root filesystem, isolated from the host. According to Singleton, anyone poking around inside it won't gain privileged access to Meta's infrastructure or other users' data. The architecture is also designed to guard against prompt injection, a technique where malicious instructions hidden in text trick an AI agent into harmful actions.

Transparency by Design

Meta deliberately built full visibility into the Runtime Cell. Users can inspect every file, from Debian system files down to the binaries that run Muse itself. A file explorer sits in the Library tab, and the Markdown files Muse generates while reasoning through answers are visible too. A classic file explorer view — surprisingly technical by today's standards — is built in, while less technical users can export their data through Settings > Data controls > Download your agent data.

From Laggard to Surprise Hit

Muse has quickly outgrown its experimental origins. The app drew more than 500,000 users in its first week and reached number one on the Apple App Store. At Meta Connect 2026, Meta expanded it with real-time video chats, dedicated email addresses, and the ability to control Mac apps.

The context matters: Meta was an early entrant in the AI race with its Llama models but has fallen behind the frontier models from OpenAI and Anthropic. Muse represents a different bet — that the best product with the widest reach can matter more than having the best model.

What to watch next is whether that bet holds. If Muse's agentic features keep expanding while its cloud computer remains free, pressure will build on OpenAI, Anthropic, and Google to open up their own sandboxes in similar ways.