Sigma is a private AI browser.
Impressively light. Packed with features.
Fast by design.

Brightly colored Sigma Browser interface showing website with infrared image of spiral galaxy NGC 5134 showing glowing cosmic dust and clusters of newborn stars captured by James Webb Space Telescope.

Smartphone screen displaying a Sigma browser mobile version with 68 tabs open, showing favorite apps including YouTube, Atomic Mail, Dropbox, Yahoo!, X, Genius, Reddit, and Medium, with a Google search bar and navigation options for Home and AI chat.

AI agent

Your work, handled

Sigma Browser window showing a flight booking site with a chat agent interface on the left requesting low-cost nonstop flights to Dubai for Feb 15, and flight options from San Francisco to Dubai listed on the right with prices, times, and airlines including United, Emirates, and Delta.

Sigma AI agent can take actions on your behalf — navigating pages, filling forms, managing tasks, and getting things done end-to-end. You describe the goal — the agent handles the steps

Learn more about AI agent

AI chat

Ask. Research. Create

Sigma Browser interface showing Letterboxd film page for Marty Supreme (2025) directed by Josh Safdie, showing a man with glasses and mustache, film description, user ratings, and a chatbot interaction about user reviews.

Sigma AI Chat lets you ask questions, run deep research, generate images, and create text — all in one place. Give it a prompt or a goal. Get answers, insights, visuals, and words that help you move forward

Learn more about AI chat

Eclipse

Your own offline AI

Sigma AI Browser runsEclipse, a local LLM built right into the browser. Your data stays on your device — no cloud processing, no sending prompts to servers. That means faster responses, full privacy, and full control over your information. Ask questions, summarize pages, write, think, and explore — all locally, all yours

Learn more about Eclipse

Stay protected while browsing

App icon featuring a stylized grid with a padlock symbol indicating security or privacy.

Learn more

Critical data stays local

Sensitive information stays on your device, not on the server

Minimize

Sensitive parts of each interaction stay local, reducing how much critical data leaves your device and minimizing unnecessary server processing

White shield icon with a black checkmark in the center on a dark rounded square background.

Learn more

Built-In ad block

Blocks intrusive ads for a cleaner and more focused browsing experience

Minimize

Our built-in ad blocker filters out intrusive ads to create a smoother browsing experience with less noise, fewer distractions, and more room for the content that matters

Icon of a vertical split showing two halves, one with two dots resembling a face, set on a rounded dark square background.

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Mnemonic profile

User identity built on blockchain cryptography

Minimize

Sensitive parts of each interaction stay local, reducing how much critical data leaves your device and minimizing unnecessary server processing

Icon of two overlapping speech bubbles symbolizing communication or chat.

Chat with page

Turn any site into a conversation. Ask questions, get instant summaries, and explore the content without leaving the page

Sigma Browser interface showing Screenshot of a Medium article titled 'Why Overthinking Feels So Exhausting — Even If You Haven’t Done Anything Yet' by Julie Hook, PhD, discussing brain activity related to overthinking.

Icon representing language translation with a character symbol and letter A connected by arrows.

Quick Translate

Translate text directly on the page. Highlight any sentence and instantly translate it into any language

Icon with a white rounded triangle and a white crescent shape on a dark rounded square background.

Extensions

Keep using your favorite extensions. Add and manage browser extensions just like you would in any modern browser

Icon of two overlapping user silhouettes representing people or a group.

Private Profiles

Separate work, personal browsing, and accounts into different spaces. Your data is encrypted and secured by your 12-word phrase

Powered by Chromium. Enhanced by us

We started with the engine of Chromium, reliable and secure, and then we made it even better

Privacy first

Advanced protections keep your browsing private by default. All connections are secured with TLS 1.3, HTTPS, and DNS-over-HTTPS

Intuitive design

Bookmarks, password managers, history, and extensions — all the tools you rely on, redesigned to be simpler and more intuitive

Web3 Integration

Connect to decentralized apps, manage wallets, and interact with blockchain networks directly in the browser

See the difference in

Sigma vs. ChatGPT Atlas

1.32x

faster

Sigma vs. Safari

1.30x

faster

Sigma vs. Brave

1.17x

faster

Sigma vs. Chrome

1.13x

faster

Sigma vs. Perplexity Comet

1.10x

faster

Performance was evaluated using the Speedometer 3.0 benchmark. The test was executed 10 times in each browser, and the final score represents the average result. All tests were conducted on a MacBook Pro M4

In tests with 10 identical tabs open, Sigma used the least amount of RAM compared to other popular browsers — keeping your system faster and more responsive

Sigma

0.8 Gb

Brave

0.92 Gb

Perplexity Comet

0.95 Gb

ChatGPT Atlas

0.98 Gb

Chrome

1.00 Gb

Safari

1.2 Gb

Compare Sigma with other popular browsers

Sigma

Atlas

Comet

Chrome

Safari

Brave

Private

Built-in AI agent

Web3 integration

Prompt injection defence

Chat with site

AI search

Your security is our priority

Everything in Sigma is designed to keep your work safe and secure

White shield icon with a black checkmark on a rounded black square background.

End-to-end encryption

All user data and AI chat conversations are end-to-end encrypted, preventing third-party access or interception

Icon of a keyhole in a circular shape on a dark rounded square background representing security.

Open-Source

The code of browser is public, making security more transparent and easier to check

Icon of a cloud with a padlock symbol inside, representing cloud security.

Online protection

Sigma detects fishing sites and warns you of threats for a safer browsing experience

Eight white stars arranged in a circle on a dark rounded square background.

GPDR and CCPA complaint

Sigma complines with GDPR and CCPA, ensuring your data follows privacy laws

Learn more in our blog

Brave vs Chrome: Which Browser has Better Features?

Compare Brave vs Chrome in terms of privacy, speed, and usability. Find out which browser is better for you

The AI Agent Security Crisis

From data leaks to system control risks, the AI agent security crisis is reshaping cybersecurity. Here’s what you need to know

Firefox vs Brave Browser: Which Browser has Better Features?

Compare Firefox vs Brave Browser in terms of privacy, speed, and usability. Find out which browser is better for you

Download Sigma Browser

Also available on Windows, iOS and Android. Linux version coming soon!

Questions & Answers

If you have any questions,
reach out to us on X at @Sigma_Browser

Sigma is a private AI browser.
Impressively light. Packed with features.
Fast by design.

Your work, handled

Ask. Research. Create

Your own offline AI

Stay protected while browsing

Critical data stays local

Sensitive parts of each interaction stay local, reducing how much critical data leaves your device and minimizing unnecessary server processing

Built-In ad block

Our built-in ad blocker filters out intrusive ads to create a smoother browsing experience with less noise, fewer distractions, and more room for the content that matters

Mnemonic profile

Sensitive parts of each interaction stay local, reducing how much critical data leaves your device and minimizing unnecessary server processing

Chat with page

Quick Translate

Extensions

Private Profiles

Powered by Chromium. Enhanced by us

Privacy first

Intuitive design

Web3 Integration

See the difference in

Your security is our priority

End-to-end encryption

Open-Source

Online protection

GPDR and CCPA complaint

Learn more in our blog

Brave vs Chrome: Which Browser has Better Features?

The AI Agent Security Crisis

Firefox vs Brave Browser: Which Browser has Better Features?

Download Sigma Browser

Questions & Answers

About

Features

Resources

Download

Legal

Sigma is a private AI browser.Impressively light. Packed with features.Fast by design.

Your work, handled

Ask. Research. Create

Your own offline AI

Stay protected while browsing

Critical data stays local

Sensitive parts of each interaction stay local, reducing how much critical data leaves your device and minimizing unnecessary server processing

Built-In ad block

Our built-in ad blocker filters out intrusive ads to create a smoother browsing experience with less noise, fewer distractions, and more room for the content that matters

Mnemonic profile

Sensitive parts of each interaction stay local, reducing how much critical data leaves your device and minimizing unnecessary server processing

Chat with page

Quick Translate

Extensions

Private Profiles

Powered by Chromium. Enhanced by us

Privacy first

Intuitive design

Web3 Integration

See the difference in

Your security is our priority

End-to-end encryption

Open-Source

Online protection

GPDR and CCPA complaint

Learn more in our blog

Brave vs Chrome: Which Browser has Better Features?

The AI Agent Security Crisis

Firefox vs Brave Browser: Which Browser has Better Features?

Download Sigma Browser

Questions & Answers

About

Features

Resources

Download

Legal

Sigma is a private AI browser.
Impressively light. Packed with features.
Fast by design.