Overview
SigmaOS is a macOS browser that treats workspaces and tabs as an organized task list. It includes vertical tabs, split screen, focus mode, page suspension, multiple logins, Chromium extension support, and synchronization across Macs. Airis is its built-in AI companion. It can chat with a website, explain selected paragraphs, search multiple pages for a starting point, and turn a website into an interactive summary. SigmaOS has a free Personal tier and paid plans with higher Airis usage and additional model access. It is a proprietary desktop application with no official source repository listed.