Perplexity brings its Personal Computer AI agent to Windows

Perplexity AI Inc. isn't hiding its ambitions anymore. Today the company shipped a Windows version of Personal Computer, the agentic software that first showed up on Mac back in April, and in doing so it's chasing more than a billion potential Windows users rather than the smaller pool of Mac owners.

What Personal Computer actually does is act like a digital worker sitting on your desktop. Tell it to edit a Word doc, tweak an Excel spreadsheet, tidy up a folder, dig through the web for research, or stitch together a task that spans several apps, and it goes and does it. The pitch is simple: most AI assistants choke when the work lives on your local machine instead of in some tidy cloud API. Perplexity built this thing specifically for what it calls the messy reality of enterprise work on local machines, pulling together files sitting on your hard drive, data from Microsoft 365, and whatever's out on the open web, all through one conversation.

Under the hood it's not purely local either. The desktop service runs a hybrid setup, leaning on Perplexity's own cloud infrastructure whenever a task needs more horsepower than the machine in front of you can offer. And because an agent poking around your files and sending emails on your behalf is inherently a little nerve-wracking, Perplexity built in guardrails: it won't train its models on your company data, it'll pause and ask for your okay before doing anything risky or hard to undo, like deleting a file or firing off an email, and it keeps a log of everything it's touched so you can check its work later.

This is really a play for the desktop, not just a feature drop. Perplexity has been circling this territory for a while. It launched a browser aimed at research about a year ago, and last August it made a bold, ultimately unsuccessful-sounding move to try buying Chrome from Google. Now it's going head to head with Microsoft, which is busy weaving Copilot and its own agents into every corner of Windows and Office. Microsoft has the obvious home-field advantage of owning both the operating system and the productivity suite. Perplexity's bet is that plenty of people will still want an assistant that doesn't care whose ecosystem your files happen to live in.

For now, this isn't a mass-market rollout. The Windows version is limited to subscribers on Perplexity's Max and Enterprise Max tiers, which start at $200 a month, so it's aimed squarely at businesses willing to pay for the experiment rather than casual users kicking the tires.