SigmaOS is an innovative web browser tailored for users who prioritize productivity and multitasking. It features a unique vertical tab layout, allowing users to organize their browsing experience efficiently. Each tab acts as a task that can be sorted, marked as complete, and locked, making project management seamless. With project-based workspaces, SigmaOS enables users to focus on specific tasks without distractions. The built-in AI assistant, named Airis, enhances the browsing experience by providing contextual chat capabilities, summarizing content, and offering real-time link previews. This functionality is particularly beneficial for researchers, students, writers, and developers who require quick access to information and efficient organization. SigmaOS also offers a Focus Mode, ensuring a distraction-free browsing environment. Additionally, it allows users to split screens for multitasking across various logins. While SigmaOS is currently available only on macOS, its features redefine web browsing for power users. However, those seeking alternatives may find other browsers with unique functionalities worth exploring. Consider other options to find the right tool that fits your specific browsing needs.