SigmaOS Alternatives

SigmaOS has been discontinued. Similar apps include Mozilla Firefox, which is free and open source. Other options are Zen Browser, Brave, Tor Browser and Google Chrome. Web Browsers like SigmaOS are a crowded field, with more than 100 alternatives for Windows, Mac, Linux, Android and iPhone.

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SigmaOS alternatives page was last updated Oct 30, 2025

Puma Browser
1 like
Puma Browser is a privacy focused mobile web browser with a new way to support creators directly.
138 Puma Browser alternatives
Cost / License
Free
Proprietary
Application type
Web Browser
Origin
Ukraine
Platforms
Android
iPhone
Android Tablet
iPad
Ukraine
Good alternative?Is Puma Browser a good alternative to SigmaOS?
OhHai Browser
Like
OhHai Browser is a browser built from the ground up to be different. Giving users a whole new way of viewing and interacting with tabs, with its virtical tab panel you can fit more tabs on one page.
141 OhHai Browser alternatives
Cost / License
Free
Open Source
Application type
Web Browser
Alerts
Discontinued
Platforms
Windows
Linux
Good alternative?Is OhHai Browser a good alternative to SigmaOS?
MetaCert
2 likes
MetaCert is a extension add-on. A new way to protect teams and remote workers from phishing attacks.
151 MetaCert alternatives
Cost / License
Freemium
Proprietary
Platforms
Windows
iPad
Google Chrome
+1
Good alternative?Is MetaCert a good alternative to SigmaOS?
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Wavebox
Productivity browser featuring unified webmail, website, and web app management, isolated multi-account support, vertical sidebar with grouping, memory-saving tab sleeping, app-to-app linking, built-in chat and screenshare, colla...

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Panda Browser
4 likes
Panda Browser is a fast, secure, and smart Android Browser. It supports both phone and tablet, brings you an amazing broadband experience.
Cost / License
Free
Proprietary
Application type
Web Browser
Platforms
Android
Android Tablet
+6
Good alternative?Is Panda Browser a good alternative to SigmaOS?
Avast Secure Browser
1 like
So after bringing you the world’s leading antivirus, our experts have now built you their dream browser — secure, fast, and private.
143 Avast Secure Browser alternatives
Cost / License
Free
Proprietary
Application type
Web Browser
Origin
Czechia
EU
Platforms
Mac
Windows
Android
iPhone
Android Tablet
iPad
Czechia
EU
Good alternative?Is Avast Secure Browser a good alternative to SigmaOS?
FREE browser
1 like
Simple browser optimized for privacy and personalisation: ad-blocking, cookie-banner auto-denying, and additional GreaseMonkey support and some other features.
44 FREE browser alternatives
Cost / License
Free
Open Source (GPL-3.0)
Application type
Web Browser
Platforms
Android
F-Droid
Good alternative?Is FREE browser a good alternative to SigmaOS?
Zoomable
Like
Zoomable is a browser that provides a full desktop web experience. It simulates a large and resizable screen and shows the desktop version of websites, so you can stay away from those bad mobile web experiences.
144 Zoomable alternatives
Cost / License
Freemium
Proprietary
Application type
Web Browser
Origin
United States
Platforms
iPhone
iPad
United States
Good alternative?Is Zoomable a good alternative to SigmaOS?
Dark Browser
Like
Dark Browser focuses on dark mode, automatically switches the webpage you are browsing to dark mode, making your browsing more comfortable.
147 Dark Browser alternatives
Cost / License
Free
Proprietary
Application type
Web Browser
Platforms
iPhone
iPad
Good alternative?Is Dark Browser a good alternative to SigmaOS?
Ephemeral
Like
Browse the Internet in private without leaving a trace of history on your computer. Ephemeral is a stripped down private browser that's perfect for avoiding persistent cookies or web trackers.
152 Ephemeral alternatives
Cost / License
Paid
Open Source (GPL-3.0)
Application type
Web Browser
Origin
United States
Alerts
Discontinued
Platforms
Linux
United States
+1
Good alternative?Is Ephemeral a good alternative to SigmaOS?
Silk Browser
Like
Optimized for Fire TV with Alexa integration, full-screen display, and direct YouTube casting. Features easy navigation, parental controls, password memory, and supports social media, shopping, and live event streaming, enhancing user experience deeply.
53 Silk Browser alternatives
Cost / License
Free
Proprietary
Application type
Web Browser
Origin
United States
Platforms
Android
Android Tablet
Kindle Fire
Fire TV
United States
+7
Good alternative?Is Silk Browser a good alternative to SigmaOS?
Wild Browser
Like
Wild Browser is the first mobile browser, fast and secure, that donates 100% net profit to wildlife funds all around the world.
100 Wild Browser alternatives
Cost / License
Free
Proprietary
Platforms
Android
Android Tablet
+3
Good alternative?Is Wild Browser a good alternative to SigmaOS?
Fruity Web Browser
Like
Fruity Web Browser is a minimalist browser designed for ministry and social media management.
Cost / License
Free
Proprietary
Application type
Web Browser
Origin
United States
Platforms
Mac
United States
Good alternative?Is Fruity Web Browser a good alternative to SigmaOS?