AI Tool

SigmaOS Review

SigmaOS is a browser that organizes tabs as tasks, features workspaces, and includes an AI assistant 'Airis' for summarization, Q&A, and search.

shipped Jul 7, 2026free

Domain rating48Monthly visits17K/mo

Why it matters

1SigmaOS exited beta on November 23, 2022, with version 1.0.

2The AI assistant, Airis, was launched in Alpha on March 27, 2024.

3It is available on macOS and supports Chrome extensions.

4Offers a free 'Personal' tier, with 'Personal Pro' at $20/month and 'Personal Max' at $30/month.

About SigmaOS

Business Model

Subscription SaaS

Platforms

macOS

Target Audience

Anyone who craves a better browser experience.

Pricing Plans

Personal

Free

• Unlimited workspaces
• Fast ad-blocker
• Limited Airis Assistant

Personal Pro

$20 / monthly

• Unlimited Advanced Airis (GPT-4o)
• Look it up (high usage)
• Interactive Summaries (high usage)

Personal Max

$30 / monthly

• More LLM Models (Llama, Claude…)
• Unlimited Look it up queries
• Unlimited Interactive Summaries

Specs

API Docs

View Documentation →

overview

What is SigmaOS?

SigmaOS is a productivity browser tool developed by SigmaOS that enables students, founders, creatives, researchers, and educators to organize online work and information using workspaces and task-like tabs. It redefines the browsing experience by treating tabs as tasks in a to-do list, enhancing efficiency with an integrated AI assistant 'Airis'. The browser is designed to make users 'faster and better at what they do on the internet' by offering a structured and focused browsing environment, primarily targeting users who manage multiple projects and tasks online.

features

Key Features of SigmaOS

SigmaOS integrates several features designed to enhance productivity and streamline web-based workflows, focusing on organization and AI assistance.

Organized workspaces: Create dedicated, persistent browser environments for different projects or life areas.
Vertical tabs: Tabs are displayed vertically, allowing for a hierarchical view of 'pages' and 'subpages'.
Tabs as tasks: Treat individual tabs as tasks that can be marked 'done' or 'locked' within a workspace.
Split screen: Work on two websites simultaneously within the same browser window.
Customizable themes: Adjust the browser's appearance, including 'Magic Mode' for matching website colors.
AI assistant 'Airis': Provides interactive summaries of web pages, answers contextual questions, rewrites text, and performs 'Look it up' queries, powered by models like GPT-4o.
Keyboard-driven shortcuts: Emphasizes single-key shortcuts for most actions, such as opening pages, splitting the screen, or sending links.
Ad-blocking: Built-in functionality to reduce distractions during browsing sessions.
Focus mode: A feature designed to minimize distractions and help users concentrate on their current task.

use cases

Who Should Use SigmaOS?

SigmaOS is designed for individuals who require a highly organized and efficient browsing experience, particularly those managing multiple projects or information streams online. Its features cater to specific professional and academic needs.

Students: For managing course materials, research papers, and project-specific tabs.
Founders/Entrepreneurs: For organizing startup-related research, communication, and development tasks.
Creatives: For managing inspiration, design resources, and project assets across different workspaces.
Researchers: For structuring information gathering, literature reviews, and data analysis across various web sources.
Educators: For organizing lesson plans, student resources, and administrative tasks.

how to use

How to Use SigmaOS

To begin using SigmaOS, users download the macOS application and can immediately start organizing their web activity into workspaces and task-like tabs. The browser emphasizes keyboard shortcuts for efficient navigation and interaction.

1Download and install the SigmaOS application from sigmaos.com on a macOS device.
2Create new workspaces for different projects or areas of focus (e.g., 'Work', 'Personal', 'Research').
3Open new 'pages' (tabs) within a workspace; these can be marked as 'done' once completed.
4Utilize the split-screen view to work on two websites simultaneously.
5Engage the 'Airis' AI assistant for summarization, Q&A, or text rewriting on any web page.
6Familiarize with keyboard shortcuts for faster navigation and task management.

pricing

SigmaOS Pricing & Plans

SigmaOS offers a freemium model with a free tier and two paid subscription plans, providing varying levels of features and support. All plans are available on a monthly basis.

Personal: Free tier, includes core browsing features and basic organization.
Personal Pro: $20 per month, offers enhanced features for advanced productivity.
Personal Max: $30 per month, provides the full suite of SigmaOS capabilities and priority support.

Pros

+Innovative workflow with workspaces and 'tabs as tasks' enhances organization and focus.
+Integrated 'Airis' AI assistant provides interactive summarization, Q&A, and text rewriting.
+Keyboard-driven navigation and single-key shortcuts accelerate workflow for power users.
+Split-screen view facilitates multitasking by allowing two websites simultaneously.
+Frequent updates, including the launch of SigmaOS Airis (Alpha) on March 27, 2024.
+Good battery performance reported on M1 Max MacBooks.

Cons

−Steep learning curve due to its shortcut-driven design, which can be complex for new users.
−Currently available only on macOS, limiting adoption for Windows or iOS users.
−Reports of reliability issues, including lag, glitches, and weak extension support.
−Some users have experienced broken institutional SSO (Single Sign-On) flows.
−Performance issues, such as lost characters when typing immediately after opening a new tab, have been reported.

Similar Tools

SigmaOS vs Competitors

SigmaOS positions itself as a productivity browser specifically designed for work, differentiating itself through its 'tabs as tasks' paradigm and integrated AI assistant. It competes with other modern browsers that focus on organization and efficiency.

Arc BrowserOn Stork

Offers a unique vertical tab bar, 'Spaces' for different contexts, and 'Little Arc' for quick, temporary browsing.

Arc provides a highly visual and customizable browsing experience with strong organization features and some AI capabilities like 'Ask on Page' and 'Tidy Tab Titles'. However, its 'tasks' are more about temporary browsing sessions rather than explicitly marking individual tabs as 'done' like SigmaOS.

Opera One↗

Features 'Tab Islands' for automatic tab grouping and a native AI assistant, Aria, integrated directly into the browser.

Opera One provides a native AI assistant and automatic tab grouping with 'Tab Islands,' which is similar to SigmaOS's AI and workspace features. While it groups tabs effectively, it doesn't explicitly treat each tab as a 'task' that can be marked as done.

Vivaldi↗

Offers an extremely customizable interface, advanced tab management features like tab stacking and tiling, and built-in mail, calendar, and RSS client.

Vivaldi excels in customization and advanced tab organization with workspaces, offering a powerful productivity browser. However, it lacks the explicit 'tabs as tasks' concept and a dedicated AI assistant for summarization or Q&A that SigmaOS provides.

Sidekick↗

Focuses on integrating web apps and managing multiple accounts within 'Sessions' to reduce context switching.

Sidekick offers strong workspace management ('Sessions') and app integration for productivity, similar to SigmaOS's workspace concept. However, it lacks the 'tabs as tasks' paradigm and a built-in AI assistant for summarization and content generation.

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