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Fast Internet Browser vs Vivaldi: catalog facts
Fast Internet Browser	Vivaldi
Free Installed from the Microsoft Store; the site does not mention a price.	Free Free, funded by default search engine and bookmark placement deals.
Windows	Windows, macOS, Linux, Android, iOS
Runs on Xbox as well as Windows PCs Built-in ad blocker	Tab stacking, tiling and vertical tabs without a single extension Built-in mail, calendar and feed reader in a side panel
Users report slowdowns with more than four tabs open Developer and engine are not stated on the site	Not open source; only the modified Chromium parts are published The sheer number of settings takes real time to work through
Downloadable app	Downloadable app
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	No account needed
Needs internet	Needs internet
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked September 21, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.