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Sleipnir

Free#48 of 145 in Web Browsers

Sleipnir: A free browser with strong gestures and tab tools across desktop and mobile. Ranked #48 of 145 in Web Browsers by our editors (4.6/10); pricing: Free plan; best for users who prefer gestures and tab efficiency.

4.6/10Editor score

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Sleipnir4.6 Visit Sleipnir

At a glance

Editor score
4.6 / 10
Pricing
Free plan
Best for
Users who prefer gestures and tab efficiency
Free plan
Yes
Paid from
Free
Browser engine
Chromium
Founded
2002 · Osaka, Japan
Facts checked
23 Sep 2026

Where it wins
- Mouse and touch gestures support fast browser actions
- Tab organization and rapid switching improve tab-heavy workflows
- Free cross-platform browser with bookmark synchronization
Where it doesn't
- Built-in ad blocking is available in Sleipnir Mobile
- Chrome extension compatibility is specified for Windows
- macOS distribution is temporarily paused over a macOS Tahoe 26 issue

Our verdict on Sleipnir

Sleipnir is a free web browser from Fenrir for Windows, macOS, iOS, and Android. It is aimed at users who want gesture-driven navigation, organized tabs, and a consistent browser family across desktop and mobile devices. The desktop browser uses the Blink rendering engine and includes mouse gestures, tab organization, rapid tab switching, bookmark synchronization, Chrome extension compatibility on Windows, Web Inspector developer tools, and browser-data import. Sleipnir Mobile adds touch gestures, tab groups, offline page viewing, password autofill, fullscreen browsing, page search, and built-in ad blocking.

Its strongest case is tab and navigation control. Gestures provide an alternative to repeatedly reaching for browser buttons, while tab organization and rapid switching suit users who keep many pages open. The product also supports bookmark synchronization across Sleipnir devices, and Fenrir Pass is listed as an integration. Windows users can extend the browser through the Chrome Web Store, while developers can use Web Inspector tools. These capabilities give Sleipnir useful breadth without changing its central focus on efficient browsing.

Platform fit needs closer attention. Sleipnir is presented as a multi-platform family, but features differ between desktop and mobile editions: ad blocking, offline viewing, and password autofill are specifically associated with Sleipnir Mobile, while Chrome extension compatibility is specified for Windows. The macOS distribution is temporarily paused because of an issue with macOS Tahoe 26. Choose Sleipnir if gestures, tab handling, and cross-device bookmarks matter more than having identical features everywhere. Users who require desktop-wide built-in ad blocking, uniform extension support across platforms, or immediate macOS distribution should consider another browser.

Your product? Our editors can test Sleipnir in depth and publish a review, labelled as paid · from $149/mo →

Sleipnir pricing

Plans Free planFree Free to use — no paid tier required for the core job.

See plans on fenrir-inc.com

Sleipnir fact sheet

Free plan	Yes
Paid from	Free
Supported platforms	Both
Browser engine	Chromium
Built-in ad blocking	Yes
Tracking protection	Not verified
Extension support	Chrome_store
Cross-device sync	Yes
Open source	Not verified
Deployment	Desktop, Mobile
Platforms	Windows, macOS, iOS
Support	Email
Built for	Solo (editorial estimate)
Pricing	Free plan
Website	fenrir-inc.com
Facts checked	23 Sep 2026

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Featured on iTechGuides

Sleipnir is listed in our Web Browsers directory. Add the badge to your site — it links back to this page.

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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

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Last updated 7 Oct 2026 · How we research and update