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SigmaOS Review

SigmaOS is a productivity-focused web browser that organizes tabs as tasks, features dedicated workspaces, and integrates an AI assistant 'Airis' for summarization and text rewriting.

shipped Jul 7, 2026aifree
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SigmaOS — product screenshot

Why it matters

1SigmaOS is primarily available for macOS, with iOS and Windows versions stated as 'coming soon'.
2The browser features an integrated AI assistant, Airis, launched in March 2024, offering summarization and Q&A capabilities.
3Pricing includes a Basic free tier, Personal Pro at $20/month, and Personal Max at $30/month, with varying Airis usage limits.
4SigmaOS 1.12 introduced rebuilt drag-and-drop functionality and Airis Link Previews.

Specs

API Docs

View Documentation →

API Available

Yes, public API

overview

What is SigmaOS?

SigmaOS is a productivity-focused web browser tool developed by SigmaOS that enables macOS users to organize tabs as tasks and streamline workflows. It integrates an AI assistant, Airis, for summarization and text rewriting. The browser re-engineers the browsing experience by treating web pages as tasks within organized workspaces, aiming to reduce tab clutter and improve focus. Its core concept revolves around 'Workspaces,' which are dedicated project environments where users can group related web pages and applications, encouraging a task-based approach to internet usage. SigmaOS is optimized for keyboard use with single-key shortcuts for most actions, aiming for speed and efficiency.

features

Key Features of SigmaOS

SigmaOS integrates a suite of features designed to enhance productivity and streamline the browsing experience, moving beyond traditional tab management to a task-oriented workflow. These features are built around a core philosophy of organization, efficiency, and AI assistance.

  • Workspaces: Dedicated environments for organizing tabs and web applications by project, client, or personal task.
  • Tabs as Tasks: Each web page is treated as a 'task' that can be marked as 'done,' snoozed, or moved, promoting task completion.
  • Airis AI Assistant: An integrated AI assistant providing interactive summaries of web pages, Q&A capabilities, text rewriting, and 'Look it up' functionality.
  • Split Screen: Native feature allowing users to open two pages side-by-side within the same workspace for multitasking and research.
  • Lazy Search: A unified search bar for querying across open tabs, the internet, commands, and bookmarks.
  • Ad-free Browsing: Includes a built-in ad blocker for a less cluttered internet experience.
  • Extension Support: Compatibility with extensions from the Chrome Web Store.
  • Single-key Shortcuts: Extensive keyboard shortcuts for rapid navigation and action execution.
  • Autosync: Automatic synchronization of workspaces and settings across multiple macOS devices.
  • Page Suspension: RAM management feature to optimize performance and battery life on macOS devices.

use cases

Who Should Use SigmaOS?

SigmaOS is designed for users who seek a highly organized, productivity-focused browsing experience, particularly those who manage multiple projects or tasks online. Its unique approach to tab management and integrated AI tools cater to individuals aiming to reduce digital clutter and enhance focus.

  • Students: For managing multiple courses, research papers, and academic projects within distinct workspaces.
  • Founders & Entrepreneurs: To organize startup-related tasks, research, and communication across various web applications.
  • Creatives: For artists, designers, and writers who need to manage inspiration, research, and creative tools in an organized manner.
  • Professionals: Individuals who frequently jump between multiple logins, accounts, or client projects and require a structured workflow.
  • Productivity Enthusiasts: Users who prioritize speed, keyboard-driven workflows, and a task-oriented approach to their digital environment.

how to use

How to Use SigmaOS

Getting started with SigmaOS involves downloading the application for macOS and familiarizing oneself with its workspace-centric and task-based browsing paradigm. The browser emphasizes keyboard shortcuts for efficient interaction.

  • 1Download and install the SigmaOS application from sigmaos.com onto a macOS device.
  • 2Create a new 'Workspace' for each project or area of focus to group related tabs and applications.
  • 3Open web pages, which are treated as 'tasks,' and utilize the 'mark as done' feature to clear completed items.
  • 4Employ the native 'Split View' to open two pages side-by-side within a workspace for efficient multitasking.
  • 5Utilize single-key shortcuts for navigation, tab management, and accessing features like 'Lazy Search'.
  • 6Engage the 'Airis' AI assistant for interactive summaries of web pages, answering questions, or rewriting text directly within the browser.

pricing

SigmaOS Pricing & Plans

SigmaOS operates on a freemium model, offering a Basic free tier with core functionalities and two paid subscription tiers, Personal Pro and Personal Max, which provide expanded access to its AI capabilities and other features.

  • Basic: Free tier, includes unlimited workspaces, a fast ad-blocker, and limited usage of the Airis Assistant.
  • Personal Pro: Priced at $20/month, includes all Basic features, unlimited usage of Advanced Airis (GPT-4o), and high usage limits for 'Look it up' and Interactive Summaries.
  • Personal Max: Priced at $30/month, includes all Personal Pro features, access to more LLM models (e.g., Llama, Claude), and unlimited 'Look it up' queries and Interactive Summaries.

Pros

  • +Task-based browsing with 'Workspaces' and 'Tabs as Tasks' enhances organization and focus.
  • +Integrated Airis AI assistant provides interactive summaries, Q&A, and text rewriting capabilities.
  • +Native Split View feature allows efficient side-by-side multitasking within a single workspace.
  • +Optimized for keyboard-driven workflows with extensive single-key shortcuts for speed and efficiency.
  • +Offers top-class performance, RAM management (Page Suspension), and macOS integration, including M1/M2 optimization.
  • +Includes a fast, built-in ad blocker for a less cluttered and more peaceful browsing experience.

Cons

  • −The shortcut-driven design presents a significant learning curve for new users and can lead to conflicts with text input shortcuts.
  • −Some users report reliability issues, including occasional lag, glitches, and broken institutional SSO (Single Sign-On) flows.
  • −Extension support, while present for Chromium extensions, is sometimes reported as weak or inconsistent by users.
  • −Currently limited to macOS, with Windows and iOS versions 'coming soon,' limiting cross-platform adoption.
  • −Users have noted a lack of customization options for shortcuts and missing features like URL autocomplete.
  • −The free tier has limited usage for advanced Airis features and interactive summaries, requiring a paid subscription for full access.

Policies

Free Tier

Vendor website advertises a free tier.

Similar Tools

SigmaOS vs Competitors

SigmaOS positions itself as a 'browser for work' that rethinks the traditional browser paradigm, focusing on speed, structure, and a task-oriented workflow. It differentiates itself through its explicit 'tabs as tasks' model and integrated AI assistant, Airis.

1
Arc Browser (with Arc Max)On StorkCompare

Arc rethinks the browser interface with 'Spaces' for contextual organization and integrates AI features for enhanced productivity.

Similar to SigmaOS, Arc emphasizes a highly organized browsing experience with dedicated workspaces ('Spaces') and AI for summarization and tab management. While SigmaOS explicitly treats tabs as tasks, Arc focuses on contextual organization and AI-powered tidying, and both offer a free base browser with optional AI enhancements.

2
Opera One (with Opera AI)↗

Opera One features 'Tab Islands' for automatic and manual tab grouping, alongside a built-in AI assistant, Opera AI, that understands browsing context.

Like SigmaOS, Opera One offers advanced tab organization (Tab Islands) and a native AI assistant for summarization, Q&A, and content generation. Both are free browsers with integrated AI, though Opera One's AI can also analyze YouTube videos and integrate with other AI models like ChatGPT and Gemini.

3
Perplexity CometOn StorkCompare

Perplexity Comet is an AI-native browser designed to automate web browsing tasks and act as a personal assistant for research and information synthesis.

Perplexity Comet directly competes with SigmaOS's AI assistant by offering an autonomous chatbot that can navigate the web and perform tasks, focusing heavily on research and summarization. While SigmaOS emphasizes tabs as tasks, Comet's AI actively interacts with open tabs and manages distractions to automate workflows. It is free with premium options available.

4
Sidekick Pro (Chrome Extension)↗

Sidekick Pro is an AI agent browser extension that automates workflows, manages tasks, and provides AI assistance across browsing, email, and calendar.

Sidekick Pro, as a Chrome extension, offers similar AI agent capabilities to SigmaOS's Airis, including summarization, Q&A, and web automations for tasks. While SigmaOS is a full browser with built-in task management, Sidekick Pro integrates AI-powered task and workflow automation directly into an existing browser environment, and it offers in-app purchases.

Visit SigmaOS↗
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