A Brave alternative on the same Chromium engine
Sigma and Brave both run on Chromium and block ads by default, so sites and extensions work the same. The difference is where your AI runs and how your profiles are protected.
Your Chrome extensions and bookmarks keep working
A local AI model built in, no setup needed
Built-in ad blocker and phishing warnings
Used less RAM than Brave in our 10-tab test
Why switch from Brave to Sigma
Brave got blocking right. Sigma keeps that and adds AI that never has to leave your device.
An AI agent ready in every tab
Describe a goal in plain words and the agent opens pages, clicks and fills forms for you. Check its work before payments and logins. Brave's AI browsing is still an early test you turn on with a feature flag.
Local AI that stays on your device
Eclipse is a local AI model built into Sigma. It runs on your device and works offline. Brave Leo answers through cloud models, and going local means connecting a model of your own.
Privacy with profiles you control
Sigma blocks ads and warns you about phishing sites. Connections use DNS-over-HTTPS, and Private Profiles keep work and personal data apart, secured by a 12-word recovery phrase.
Lighter and faster
Based on our own tests, Sigma runs 1.17x faster than Brave in Speedometer 3.0 and uses less RAM with the same tabs open. See our RAM test.
Sigma vs. Brave
1.17x
faster
Sigma's own test with Speedometer 3.0. We ran it 10 times in each browser on a MacBook Pro M4 and took the average score.
With 10 identical tabs open, Sigma used 0.8 GB of RAM and Brave used 0.92 GB in Sigma's own test. A lighter browser leaves more memory for everything else.
Sigma
0.8 GB
Brave
0.92 GB
Private like Brave, with AI that stays local
Brave blocks trackers well. Sigma does too, and keeps your AI prompts and profiles on your side. Learn more about Sigma Private Browser
Critical data stays local
With Eclipse your prompts and chat history stay on your device
Eclipse runs on your device and works offline, so nothing you ask is sent to a server. Brave Leo sends prompts to models hosted in the cloud.
Built-in ad blocker
Ads are blocked out of the box, no extension needed
Sigma blocks ads by default and warns you about phishing sites in real time. It's on from the first launch, with nothing to set up.
Private Profiles
Encrypted and secured by a 12-word recovery phrase
Keep work, personal browsing and accounts in separate spaces. Your data is encrypted and secured by a 12-word recovery phrase built on blockchain cryptography.
AI tools built into Sigma
Brave Leo answers in a sidebar from cloud models. In Sigma the AI tools live in the browser, and Eclipse runs fully on your device.
AI agent
Tasks done for you
Describe a goal in plain words. Sigma's AI agent opens pages, clicks, fills forms and finishes multi-step tasks for you. Check its work before payments and logins.
Learn more about the AI agentAI chat
Ask. Research. Create
In Sigma you can ask questions, chat with any page, run Deep Research and generate images from a prompt. All of it happens in the same window, with Quick Translate one highlight away.
Learn more about Deep ResearchEclipse
Your own offline AI
Eclipse is a local AI model built into Sigma. It runs on your device, works offline and costs nothing. Ask questions, summarize pages and write drafts while your prompts stay with you.
Learn more about EclipseIs Sigma a better browser than Brave for you?
If one of these sounds like you, the switch pays off on day one.
You want AI without the cloud
Eclipse answers on your device, even offline. It's a good fit for drafts, notes and questions you'd rather keep to yourself.
You research a lot
Deep Research collects sources and groups the findings. Chat With Page summarizes any article without leaving it.
You keep separate profiles
Private Profiles keep work, personal browsing and accounts apart, each secured by a 12-word recovery phrase.
Replace Brave with Sigma in three steps
1
Download Sigma
Get the free browser for macOS or Windows, or from the App Store on iPhone. It's a Brave alternative on the same Chromium engine, so your extensions work.
2
Pick local AI
Choose Eclipse, the local model, when you want prompts to stay on your device. It works without an internet connection.
3
Browse with AI
Ask about any page, translate highlighted text with Quick Translate or hand a task to the agent. When you need sources compared, open Deep Research.
Sigma vs Brave, feature by feature
What each browser gives you out of the box, checked in October 2026.
Sigma
Brave
Local AI model built in, no setup
Offline AI out of the box
AI chats that never leave your device
Local AI for your PDFs
Private Profiles with a recovery phrase
AI agent on by default, no test flag
Brave Leo uses cloud models hosted by Brave, and a local model means connecting your own. Brave's AI browsing is an early test behind a feature flag. Checked in October 2026.
Questions & Answers
If you have any questions,
reach out to us on X at @Sigma_Browser
reach out to us on X at @Sigma_Browser
Is Sigma a good alternative to Brave?
Do Chrome extensions work in Sigma?
Is Sigma faster than Brave?
Does Sigma send my AI prompts to a server?
Is Sigma free?
What can I use instead of Brave?
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Get Sigma on Android
We’ll let you know when Sigma for Android launches.
