Dia

Dia is an AI-first web browser from The Browser Company — the same team behind Arc, which the company moved into maintenance mode to focus on Dia instead. Where Atlas and Comet keep a fairly familiar browser layout with an AI sidebar bolted on, Dia takes a more minimal approach: a clean, Chrome-like shell with a chat bar built into the address bar itself, so you can ask it a question or type a URL in the same place.

Dia's standout feature is the ability to chat with every tab you have open at once — ask it to compare three product pages, summarize a set of research tabs, or pull together everything you read on a topic last week, and it answers using all of that context together. "Skills" let you save a prompt as a reusable command for tasks you repeat often, a Morning Brief pulls your calendar, inbox, and key links into one summary before your day starts, and it automatically groups tabs opened during a meeting so they're easy to find again later.

The Browser Company was acquired by Atlassian for roughly $610 million in 2025, and Dia had its public launch that October after a few months in invite-only beta. It currently runs only on Apple Silicon Macs, with Windows and mobile support still in progress. The core browser and basic AI features are free; a $20/month Pro plan removes the usage caps on chat and Skills, and "Dia for Work" adds SSO and admin controls for teams.