Arc

Arc, built by The Browser Company, is a web browser that reimagined core browsing interactions that had stayed largely unchanged since the earliest tabbed browsers, replacing the traditional horizontal tab bar with a vertical, organizable sidebar, built-in split-screen viewing of multiple sites side by side, and "Spaces" that let users maintain entirely separate sets of tabs and browsing contexts for different parts of their life, like work and personal browsing, without those contexts bleeding into each other in one long, undifferentiated tab bar. Its auto-archiving feature automatically closes and files away tabs that haven't been used in a while, addressing the common problem of tab bars becoming an unmanageable, anxiety-inducing wall of dozens of half-remembered open tabs that a user never quite gets around to closing manually. Arc's built-in tools include a simple drag-and-drop page editor for quickly customizing how a webpage looks or removing distracting elements, and Easels, a canvas feature for visually organizing links, notes, and images pulled directly from the web. Because it's built on the same underlying web engine as other mainstream browsers, Arc supports existing browser extensions and renders websites compatibly, so switching doesn't mean giving up an existing extension setup. The Browser Company shifted its primary focus to a new AI-native browser called Dia and moved Arc into maintenance mode, and was acquired by Atlassian in 2025, but Arc remains free to download and use for people who want its more organized, non-standard take on browsing.