SigmaOS

SigmaOS is a web browser designed to address tab overload and improve focus during online work. It reimagines the traditional browser interface by treating tabs as tasks in a to-do list, allowing users to mark them as done or lock them for later. The browser organizes open pages into separate workspaces, which function like rooms for different activities, and uses a vertical tab layout for better overview.

Key capabilities include Lazy Search, which lets users search tabs, bookmarks, and the internet by pressing the spacebar. An AI companion called Airis can chat with any website, explain paragraphs in context, and search the internet to build starting points for research. The Simplify feature reduces any website into a short interactive summary. Other features include split-screen multitasking, a built-in ad blocker, a focus mode that hides everything but the current page, and a Magic Theme that adapts the browser’s colors to the site being viewed. SigmaOS supports extensions from the Chrome Web Store and uses the WebKit rendering engine, with autosync to retrieve the setup on any Mac.

The browser is intended for individuals seeking a more organized and less distracting browsing experience. It is available as a free download for macOS, with no mention of paid plans, trials, or seat-based pricing on the provided pages.