SigmaOS
SigmaOS builds a native macOS productivity browser on WebKit/SwiftUI, offering workspace-based tab organization and the proprietary A1Kit AI engine (Airis assistant) for individual consumers, students, founders, and creators via a freemium subscription model.
- Company typePrivate
- Founded2020
- HeadquartersLondon, United Kingdom
- Headcount1–10
- GTM typeB2C
- OfferingSoftware
What SigmaOS does
SigmaOS Inc. is a London-based software company that builds SigmaOS, a productivity-focused web browser for macOS developed natively on WebKit with a SwiftUI interface. The product differentiates from Chrome-based competitors through workspace-based tab organization (Workspaces, Vertical Tabs, Tabs as Tasks, Split Screen), single-key keyboard shortcuts, and the A1Kit AI engine that powers the Airis assistant for context-aware chat with websites, multi-page research (Look it up), and content summarization (Simplify). It is also the first WebKit-powered browser to support extensions from the Chrome Web Store, combining Safari-class performance on Apple Silicon with Chrome-class extensibility.
The company targets horizontal consumer and prosumer segments — students, founders, educators, creators, and researchers — and is distributed exclusively through direct download from sigmaos.com with no sales-assisted motion. Revenue is generated via a freemium subscription model: a free Personal tier with limited Airis usage, a Personal Pro tier at $20/month (or $10/month annual) with unlimited Advanced Airis powered by GPT-4o, and a Personal Max tier at $30/month with multi-LLM access (Llama, Claude) and unlimited research queries. SigmaOS also runs a $5 referral-credit viral loop and an active Slack community, with growth primarily driven by Product Hunt visibility (#1 Product of the Day/Week/Month) and organic endorsements from public creators and investors.
SigmaOS is a private, venture-backed company that closed a $4M seed round in November 2022 led by LocalGlobe, with Y Combinator, 7percent Ventures, Moonfire Ventures, Pioneer Fund, TrueSight Ventures, and Ventures Together participating. It operates with a 1–10 person team and is incorporated in England and Wales (company number 13201691).
SigmaOS firmographics
Firmographics- Name
- SigmaOS
- Legal name
- SigmaOS Inc.
- Website
- https://sigmaos.com
- Company type
- Private
- Founded year
- 2020
- Operating status
- Operating
- Headcount range
- 1–10 employees
- Short description
- SigmaOS builds a native macOS productivity browser on WebKit/SwiftUI, offering workspace-based tab organization and the proprietary A1Kit AI engine (Airis assistant) for individual consumers, students, founders, and creators via a freemium subscription model.
- Ownership category
- akta.pro rank
SigmaOS industry classification
Industry- Product category
- Web Browser Software
- NAICS
- Custom Computer Programming Services (541511)
- SIC
- Services-Computer Programming, Data Processing, Etc. (7370)
- akta.pro primary industry
- LLMOps & Generative AI Platforms (Prompt/Agent Orchestration, RAG) (HDAEANAD)
Keywords
Where SigmaOS is headquartered
LocationHeadquarters
- HQ city
- London
- HQ country
- United Kingdom
- HQ region
- Europe
Offices1 record
Markets served
SigmaOS business model
Business model- GTM type
- B2C
- Offering type
- Software
- Cost components
- Personnel, Technology or R&D, Marketing or Sales, Operations
Revenue model
- Browser Subscription (Personal Pro & Max): SigmaOS generates revenue primarily through tiered subscription plans. A free Personal tier provides core browser functionality. Paid tiers (Personal Pro at $20/month and Personal Max at $30/month) unlock advanced AI features including unlimited Airis usage, GPT-4o access, unlimited Look it up queries, and multiple LLM models (Llama, Claude). The company emphasizes that paid memberships ensure users remain the priority over search engines, avoiding ad-driven business models. Student and educator discounts of 50% are available. A 14-day money-back guarantee reduces churn risk.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Freemium | Others | Free browser with core productivity features |
| Subscription | Monthly | Pro browser with unlimited AI and advanced features |
| Subscription | Monthly | Max browser with all AI models and unlimited usage |
Go-to-market motion1 record
Distribution channels1 record
Marketing channels7 records
SigmaOS product offering
Product offeringCore offering
SigmaOS is a native macOS web browser built on WebKit and SwiftUI that organizes browsing into named workspaces, treats tabs as tasks, and ships productivity features such as vertical tabs, split screen, lazy search, focus mode, and an ad blocker. It integrates Airis, an AI assistant powered by a proprietary A1Kit engine that combines multiple LLMs (GPT-4o, Llama, Claude) with custom page extraction for context-aware help. The product is distributed as a free download with paid Personal Pro ($9.99/month) and Personal Max ($19.99/month) subscription tiers, including student/educator discounts.
Product overview
SigmaOS is a macOS web browser built with WebKit and SwiftUI, featuring a workspace-based architecture for tab organization and an AI-powered assistant called Airis. The core SigmaOS browser includes productivity features like Workspaces, Vertical Tabs, Split Screen, Lazy Search, and Focus Mode. The AI layer consists of A1Kit (the AI browser engine), Airis (conversational AI companion), Look it up (AI search), and Simplify (content summarization). The product is offered in three tiers: a free Personal tier, Personal Pro ($20/month) with advanced AI features powered by GPT-4o, and Personal Max ($30/month) adding access to additional LLMs including Llama and Claude.
Differentiator
Problem solved
Functional benefit
Products and services
- SigmaOS Browser A native macOS web browser built on WebKit and SwiftUI that organizes browsing into named workspaces, treats tabs as tasks, and includes productivity features (vertical tabs, split screen, lazy search, focus mode, ad blocker) plus the Airis AI assistant powered by the proprietary A1Kit engine. Sold directly to individual macOS users as a free download with optional Personal Pro ($9.99/month) and Personal Max ($19.99/month) subscriptions, including student and educator discounts.
Quantifiable outcome
- Achieved #1 Product of the Day, Week, and Month on Product Hunt simultaneously
- +1 more outcomes
Companies that use SigmaOS
Customer profileNamed customers4 records
Segments5 records
Ideal customer profiles4 records
SigmaOS technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Integration22 records
AI capability4 records
Feature17 records
SigmaOS partnerships and signals
Strategic signalScale indicators2 records
Recent moves6 records
Expansion highlights6 records
SigmaOS competitors and assessment
Company assessmentDirect peers
- The Browser Company (Arc): Arc is the most direct productivity-focused browser competitor, also built on Chromium with workspace organization, vertical tabs, and AI features (Arc Max). Targets the same power-user/founder segment as SigmaOS with a similar PLG and freemium model.
- Brave Software: Brave is a privacy-focused Chromium browser with built-in ad blocking, a creator economy, and a Leo AI assistant — directly overlapping SigmaOS on the 'better than Chrome' thesis, ad-free browsing, and integrated AI.
- Vivaldi Technologies: Vivaldi is a power-user Chromium browser with deep customization, tab management (tab stacks, workspaces), and built-in tools. Competes with SigmaOS for the same productivity/tab-overload use case, though without an AI layer.
- DuckDuckGo: DuckDuckGo's privacy-focused browser offers built-in ad blocking, tracker blocking, and AI-assisted answers (DuckAssist) — overlapping SigmaOS on the alternative-to-Chrome positioning and integrated AI assistance.
Broad incumbents
- Opera: Opera is a long-standing Chromium-based browser with built-in features (ad blocker, sidebar messengers, Aria AI). It is a much larger, publicly listed competitor that overlaps with SigmaOS on built-in productivity and AI features.
- Mozilla Firefox: Firefox is a major independent browser with a custom engine, built-in privacy features, and an emerging AI integration. A direct incumbent competitor in the alternative-to-Chrome space and an option in SigmaOS's own migration tool.
- Google Chrome: Chrome is the dominant global browser and SigmaOS's primary incumbent competitor. Chrome is increasingly shipping AI features (Gemini integration) that compete directly with Airis, supported by unmatched distribution via Android and default install.
- Microsoft Edge: Edge is the default Windows browser with integrated Copilot AI, vertical tabs, workspaces, and split screen — the closest feature-by-feature overlap with SigmaOS at much greater scale.
- Apple Safari: Safari is the default macOS browser and a structural constraint on SigmaOS. It is the most direct platform incumbent SigmaOS must displace, with Apple Intelligence adding AI features that compete with Airis.
Emerging players
- Sidekick (browser): Sidekick is a productivity-focused browser that SigmaOS explicitly supports in its migration tool. It targets the same professional/founder audience with similar tab-management and workspace features.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat5 records
Key risks6 records
Key highlights6 records
Customer concentration
SigmaOS social profiles
Digital presenceSigmaOS financial estimates
Financial estimateRevenue estimate
Valuation estimate
SigmaOS leadership team
Management profileNumber of profiles
Profiles2 records
SigmaOS funding detail
Funding detailFunding overview
Funding rounds2 records
Investors7 records
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
SigmaOS M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about SigmaOS
What does SigmaOS do?
SigmaOS is a native macOS web browser built on WebKit and SwiftUI that organizes browsing into named workspaces, treats tabs as tasks, and ships productivity features such as vertical tabs, split screen, lazy search, focus mode, and an ad blocker. It integrates Airis, an AI assistant powered by a proprietary A1Kit engine that combines multiple LLMs (GPT-4o, Llama, Claude) with custom page extraction for context-aware help. The product is distributed as a free download with paid Personal Pro ($9.99/month) and Personal Max ($19.99/month) subscription tiers, including student/educator discounts.
Is SigmaOS a public or private company?
SigmaOS is a private company. It is classified as venture growth investor backed and is currently operating.
When was SigmaOS founded?
SigmaOS was founded in 2020. It employs 1 to 10 people.
Where is SigmaOS based?
SigmaOS is headquartered in London, United Kingdom, in the Europe region.
How does SigmaOS make money?
One revenue line is on record: browser Subscription (Personal Pro & Max).
Who are SigmaOS's main competitors?
Direct peers on record are The Browser Company (Arc), Brave Software, Vivaldi Technologies and DuckDuckGo. Broad incumbents are Opera, Mozilla Firefox, Google Chrome, Microsoft Edge and Apple Safari. Sidekick (browser) is listed as an emerging player.
Does SigmaOS have an API?
No public API is recorded for SigmaOS.
What industry is SigmaOS in?
SigmaOS's product category is Web Browser Software. Its primary akta.pro industry code is HDAEANAD, LLMOps & Generative AI Platforms (Prompt/Agent Orchestration, RAG). Its NAICS code is 541511 and its SIC code is 7370.