Arc

Arc is shutting down: The Browser Company closed new sign-ups on October 22, 2026, and the Mac and Windows apps stop working on December 22, 2026. Until then, it remains one of the boldest browser designs of the decade — less a browser than an operating system for the web. It discards the traditional top-bar tab strip in favor of a vertical sidebar and "Spaces," allowing you to organize your browsing contextually—separating "Work" from "Personal" completely. It treats tabs more like apps, keeping your most-used sites persistent and organized.

Its unique features include "Boosts" (which let you customize the look of any website), a "Little Arc" window for quick lookups, and built-in AI that renames downloaded files and summarizes search results. The command bar acts as a universal launcher, making mouse-free navigation incredibly fluid.

The shutdown has been coming for a while. The Browser Company put Arc into maintenance mode in May 2025 and moved its entire team to Dia; Atlassian then acquired the company in September 2025. Dia's importer brings over passwords, bookmarks, history, extensions and tabs, though not Easels or Boosts, and anyone who wants a copy of their data has to request an export before December 15. If you are still on Arc, plan the switch now — to Dia if you want the same team's take on AI browsing, or to a browser with vertical tabs and workspaces, such as Zen or Vivaldi, if it was the sidebar you loved.