Ardia alternatives.

Arc is The Browser Company’s Chromium browser for Mac and Windows, with tabs down the side, spaces, folders and Split View. Its shutdown was announced October 22, 2026: new accounts are closed, and the desktop app will stop working December 22, 2026.

Keeps: tabs down the side, spaces, folders in the sidebar, Split View, Chrome extensions and a free price. Misses: an ad blocker.

Pick it if you already use Arc and are preparing to move before December 22, 2026. The catch: New Arc accounts closed October 22, 2026.

Vivaldi is a Chromium browser with a setting for nearly everything, mail, calendar and feeds built in, a free Proton VPN and no AI by design, on every desktop and phone.

Keeps: tabs down the side (as a setting), spaces, folders in the sidebar, Split View, Chrome extensions, an ad blocker and a free price.

Pick it if you want mail, calendar, feeds, notes and a VPN in the browser. The catch: No AI assistant or agent, by design.

Zen is a free, open-source browser built on Firefox that brings Arc’s layout, tabs down the side with spaces, folders and Split View, to Mac, Windows and Linux.

Keeps: tabs down the side, spaces, folders in the sidebar, Split View and a free price. Misses: Chrome extensions and an ad blocker.

Pick it if you want Arc’s layout, free and open source. The catch: Releases are still labeled beta.

Aside is an AI agent browser from a Y Combinator startup, on Chromium, for Mac and Windows. Its agent does multi-step work in the sites you are signed in to, on Aside’s own models or your ChatGPT or Claude plan.

Keeps: tabs down the side, spaces, folders in the sidebar, Split View, Chrome extensions, an ad blocker and a free price.

Pick it if you want an agent for multi-step work across your signed-in sites, on Mac or Windows. The catch: The free plan has 500 AI credits a month; more is Pro at $20 or Max at $200.

SigmaOS is a Mac browser on WebKit that treats tabs like a to-do list, in workspaces down the side, with an AI assistant called Airis.

Keeps: tabs down the side, spaces, Split View, Chrome extensions, an ad blocker and a free price. Misses: folders in the sidebar.

Pick it if you want workspaces and tabs you mark done, on a Mac. The catch: Mac only.

Orion is Kagi’s browser for Mac, iPhone and iPad, on WebKit, the engine Safari uses, that also runs many Chrome and Firefox extensions. It has no telemetry and blocks ads by default.

Keeps: tabs down the side (as a setting), spaces, folders in the sidebar, Chrome extensions, an ad blocker and a free price. Misses: Split View.

Pick it if you want Safari’s engine with Chrome and Firefox extensions, on Mac and iPhone. The catch: Apple only: the Windows and Linux versions stopped on October 2, 2026.

Opera One is Opera’s free Chromium browser on every desktop and phone, with a free browser VPN, an ad blocker, messengers in the sidebar and Opera AI. Its agents are in a separate browser, Opera Neon.

Keeps: tabs down the side (as a setting), spaces, folders in the sidebar, Split View, Chrome extensions, an ad blocker and a free price.

Pick it if you want a free browser VPN and an ad blocker built in. The catch: Opera AI only chats and sums up; agents need Opera Neon at $19.90 a month.