kitio.aiAdded Oct 28, 2026
SigmaOS
FreemiumMac browser with workspaces, tabs as tasks and an AI companion
What is SigmaOS?
SigmaOS is a web browser that organizes tabs into workspaces and vertical lists you can mark as done like a to-do list. Its AI companion, Airis, answers questions about the page you are on, and Lazy Search finds tabs, sites, commands and bookmarks.
Workspaces keep projects apart, each with its own logins, and vertical tabs give an overview of open pages. Tabs can be locked to stay around or checked off when finished, and split screen puts two sites side by side.
Pressing the spacebar opens Lazy Search across your tabs, the web, commands and bookmarks. Ask Anything lets Airis answer in the context of the current page, which helps with summaries and quick research without leaving the tab.
Features
- Workspaces
- Vertical tabs
- Tabs as tasks
- Split screen
- Lazy Search
- Airis AI companion
Tags
Releases
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Organization
SigmaOS
🇺🇸 United States
Listed by kitio.ai · unverified owner
Pricing
- Pricing model
- Freemium
- Paid options from
- Not listed
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Pros and cons
Pros
- Free to download
- Clear tab organization by workspace
- AI answers in the page context
Cons
- Mac only
- Takes getting used to after Chrome
- Pricing for extras not shown
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Q&A
What is SigmaOS?
SigmaOS is a web browser that organizes tabs into workspaces and vertical lists you can mark as done like a to-do list. Its AI companion, Airis, answers questions about the page you are on, and Lazy Search finds tabs, sites, commands and bookmarks.
Does SigmaOS keep separate logins per workspace?
Yes. Workspaces let you jump between different logins for the same sites.
What can Airis do in SigmaOS?
Airis is the built-in AI companion that answers questions in the context of the page you are viewing.
How much does SigmaOS cost?
SigmaOS is freemium.
Is there a free version of SigmaOS?
Yes. SigmaOS has a free plan, and paid plans add more usage and features.
What are the main features of SigmaOS?
Workspaces, Vertical tabs, Tabs as tasks, Split screen, Lazy Search, Airis AI companion.
Who makes SigmaOS?
SigmaOS is made by SigmaOS.
What are the best alternatives to SigmaOS?
Popular alternatives include Microsoft 365 Copilot, ClickUp, Readwise Reader.