A free, open source Mac browser that rebuilds Arc's Spaces and sidebar.

The best AI browsers in 2026 compared: Comet, Dia, Aside, ego(lite) and Opera Neon, with prices, platforms, agent features and what replaced ChatGPT Atlas.

Arc shuts down Dec 22, 2026. Compare 9 Arc alternatives, Zen, Dia, Crest, Ardia, Comet and more, with prices, platforms and what each one lacks.