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

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AI agent

Your work, handled

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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

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AI chat

Ask. Research. Create

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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

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Eclipse

Your own offline AI

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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

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Critical data stays local

Sensitive information stays on your device, not on the server

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Minimize

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

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Built-In ad block

Blocks intrusive ads for a cleaner and more focused browsing experience

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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

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Mnemonic profile

User identity built on blockchain cryptography

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Minimize

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

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Chat with page

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

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Quick Translate

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

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Extensions

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

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Private Profiles

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

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Powered by Chromium. Enhanced by us

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

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Privacy first

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

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Intuitive design

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

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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
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1.32x
faster
Sigma vs. Safari
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1.30x
faster
Sigma vs. Brave
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1.17x
faster
Sigma vs. Chrome
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1.13x
faster
Sigma vs. Perplexity Comet
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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
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0.8 Gb
Brave
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0.92 Gb
Perplexity Comet
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0.95 Gb
ChatGPT Atlas
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0.98 Gb
Chrome
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1.00 Gb
Safari
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1.2 Gb

Compare Sigma with other popular browsers

Sigma
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Atlas
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Comet
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Chrome
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Safari
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Brave
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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

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End-to-end encryption

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

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Open-Source

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

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Online protection

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

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GPDR and CCPA complaint

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

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
What is Sigma AI Browser?
What’s a browser‑based AI agent?
How is this different from a chatbot or AI assistant?
What kinds of tasks can it do?
What is Deep Research mode?
Is it safe? Will you store my data?
The browser or AI agent isn’t responding, what should I do?
Where can I learn more or suggest features?
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