A few years ago, Tara Feener’s career took an unexpected pivot. She’s spent nearly two decades working on creative tools for companies like Adobe, FiftyThree, WeTransfer, and Vimeo, and was content to keep working in that domain.

But then the Browser Company came along, and Feener saw an opportunity to build something even more ambitious. Feener—one of Fast Company’s AI 20 honorees for 2025—is now the company’s head of engineering, overseeing its AI-focused Dia browser and its earlier Arc browser.

The browser is suddenly an area of intense interest for AI companies, and Feener understands why: It’s the first stop for looking up information, and it’s already connected to the apps and services you use every day. OpenAI and Perplexity both offer their own browsers now, borrowing some Dia fe

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