SigmaOS

What it is for

SigmaOS is a Mac productivity browser: you keep pages in named workspaces like a to-do list and split a Notion doc next to a music pane, and Personal is Free forever ($0). Use it when the job is a workspace browser you start at a public $, not when you need a Chromium AI sidecar.

Soft-note: Personal Free forever + paid Airis tiers (Pro / Max). Distinct from Rill, Nimbus, Dia, ChatGPT Atlas, Perplexity Comet, and Browser Use.

What makes it unique: the cover is SigmaOS’s official desk UI (IcelandOffsite workspace, left rail Main / calendar / notion / glass cottage / gmail / musick, split panes Place to stay + La La Land player, Things to do Aurora hunting / Visit Reykjavik / Eat a Pilsner / Dogsledding) from sigmaos.com — not a Product Hunt poster or wordmark. The IcelandOffsite page itself is ops of the workspace.

Key features

• Workspace rail — named rooms on the far left (Main, calendar, notion, glass cottage, gmail; cover still; Workspaces). One desk. Cover IcelandOffsite sits here. New page sits here as a CTA, not a sixth desk.
• Pages as todos — the vertical page list (notionation, glass cottage, gmail, what's new?) you lock or mark done (cover; product “Tabs as tasks” / D for Done). A page list, not a Pro tile.
• Sidepage rail — the second stack under Sidepage (cover musick / New Sidepage; Split Screen). A side stack, not a Share button.
• Split screen — main Notion page beside the music pane (cover IcelandOffsite + La La Land / Another Day Of Sun 0:06 / 3:48; docs ⌘ + →). A split, not an Airis chip.
• Page canvas — the live site in the main pane (cover IcelandOffsite / Let's go to Iceland for our team off-site! / Place to stay Glass cottage with Hot tub). A page, not a Max tile.
• Things to do — the checklist on that page (cover Booked, Aurora hunting, Visit Reykjavik, Eat a Pilsner, Dogsledding unchecked). A list, not a New Sidepage CTA.

Share / New page / New Sidepage on the cover are CTAs (not desks). Personal Free / Pro / Max tiles stay in Pricing. Airis / Ask Anything / Simplify / Look it up are AI extras, not a sixth desk we fold into Workspaces.

Who it's for

Best fit: Mac users who will stay on Personal Free forever at $0 (unlimited workspaces, ad-blocker, limited Airis) while they open a first IcelandOffsite workspace, then Personal Pro at $20/month when they need unlimited Advanced Airis — not Personal Max $30 unless they need more LLM models and unlimited Look it up / Interactive Summaries. Students and educators print 50% off Pro.

Pricing

Verified 2026-10-23 (Asia/Shanghai) from sigmaos.com FAQ + Membership cards. Figures below are printed USD. Soft-note: Free Personal forever + paid Airis tiers.

• Personal (Basic / Free) — $0 forever. FAQ: “SigmaOS Personal is free for everyone and anyone, forever.” Card: unlimited workspaces, fast ad-blocker, Airis Assistant (limited).
• Personal Pro — $20/month (“starting at $20 a month” in the FAQ). 14-day money-back. Unlimited Advanced Airis (GPT-4o). Look it up (high usage). Interactive Summaries (high usage).
• Personal Max — $30/month. 14-day money-back. Everything in Personal Pro, plus more LLM models (Llama, Claude…), unlimited Look it up queries, unlimited Interactive Summaries.
• Students / educators — 50% off SigmaOS Pro (FAQ).
• Platform — macOS only on the FAQ we fetched. “Keep your eyes peeled for iOS and Windows.” Do not invent a Windows $.
• No printed yearly seat $ on the Membership cards we fetched. Do not invent one.

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Limitations / costs

• Unlimited Airis is paid. Free Personal keeps Airis limited; Pro is $20/month.
• Mac-only on the FAQ we fetched. Not a Windows Chromium you can swap in for Chrome.
• A workspace browser, not Dia’s tab-aware Answers. For that browser see Dia.
• Proprietary. We omit a GitHub CTA rather than invent a repo.

Alternatives

• Dia — The Browser Company’s AI browser when you want Better Browser $0 / Better Answers $10 card / $20 FAQ, not SigmaOS’s IcelandOffsite / musick split.
• ChatGPT Atlas — OpenAI’s ChatGPT-native browser (scheduled stop 2026-08-09; Plus $20) when you want Ask ChatGPT in Chromium, not pages-as-todos.
• Rill — a Mac AI browser when you want Free $0 + ⌘E / At work, not Personal Pro $20.
• Nimbus — an agentic browser when you want founding 500 at $0, not Things to do on a workspace page.
• Perplexity Comet — a sidecar assistant when you want Comet $0 + Comet Plus $5, not Airis Max $30.

Official tutorial

Official SigmaOS channel exists. We oEmbedded Hello again, internet :) (JJTj5URTpKU, author SigmaOS) — a brand film, not a how-to we would embed as officialVideo. Docs Start here point to a Chris walkthrough (EBsqVHxkI3k) — third-party; we do not embed Chris Tomshack / Ali Abdaal. Do not claim “no official YouTube”: the live official handle is @SigmaOS.

Written path: sigmaos.com plus Workspaces, Split Screen, and Shortcuts.

Website

https://sigmaos.com/

Source

Catalog row curated for AI Tools Nav. Cover is SigmaOS’s official IcelandOffsite desk still (workspace rail Main/calendar/notion/gmail/musick + Place to stay + Things to do + La La Land split) — not a PH poster. Distinct from rill / nimbus / dia-browser / chatgpt-atlas / perplexity-comet / browser-use. Dollars checked on sigmaos.com FAQ + Membership (Personal $0 forever; Pro $20/mo; Max $30/mo; students/educators 50% off Pro). Soft-note Free Personal + paid Airis. YouTube: official channel @SigmaOS linked; brand film oEmbedded, not used as how-to; Chris docs walkthrough not embedded.

Last verified

2026-10-23 (Asia/Shanghai) editorial check.