Zigzag Browser is lightweight, weighing just 18 MB, open-source, WebKit-based native Mac browser launched as a direct response to Arc entering maintenance mode and advising it will be shutting down on December 22, 2026, it features colored spaces, split view, a command bar, and a one-click Arc data/sign-in importer.
Zen Browser is an open-source, Firefox (Gecko)-based browser that mirrors Arc’s vertical sidebar, workspaces, pinned tabs, and split-view design.
Nook is an open-source, WebKit-based Mac browser designed by Maciej Baginski as a clean, stable Arc alternative with upcoming Apple On-Device AI support.
Dia is the official AI-focused browser built by The Browser Company (the makers of Arc) as their next-generation project ahead of Arc’s sunset.