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SigmaOS

Mac browser with built-in AI to summarize and ask about pages.

Visit SigmaOS » sigmaos.com

SigmaOS at a glance
What it doesMac browser with built-in AI to summarize and ask about pages
CategoryChat & Assistants
Websitesigmaos.com
CheckedWebsite working when last checked (2026-10-16)

In their own words

“A smarter way to browse the internet. Say hi 👋 to your new browser experience!”
— from the SigmaOS website

8 alternatives to SigmaOS

Other chat & assistants tools that do similar things:

Glarity

Browser extension that summarizes and answers questions about pages

Brave Leo

Private AI assistant built into the Brave browser

Opera Aria

Free AI assistant built into the Opera browser

MaxAI

AI browser extension to chat, summarize and reply on any website

Merlin

AI assistant extension to chat, summarize videos and pages

Raycast AI

Mac launcher with built-in AI chat and quick AI commands

Smallpdf Chat PDF

Upload a PDF and ask the AI questions about it

Sigma AI Browser

Privacy-focused AI browser with a built-in assistant

See all Chat & Assistants tools »

How to choose

  1. Start with the assistant that fits the apps you already use. Built-in beats switching apps.
  2. Give each one the same real task from your week (an email, a summary, a plan) and compare the answers.
  3. If you need facts, pick one that shows sources, and click them. All assistants can be confidently wrong.

Full guide to choosing chat & assistants tools »

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