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Vivaldi vs Herond: catalog facts
Vivaldi	Herond
Free Free, funded by default search engine and bookmark placement deals.	Free Free to download; no paid tier is listed on the homepage.
Windows, macOS, Linux, Android, iOS	Windows, macOS, Android, iOS
Tab stacking, tiling and vertical tabs without a single extension Built-in mail, calendar and feed reader in a side panel	Built-in ad and tracker blocking Integrated crypto wallet and dApp access
Not open source; only the modified Chromium parts are published The sheer number of settings takes real time to work through	Closed source Strong crypto and Web3 focus will not suit everyone
Downloadable app	Downloadable app
Closed source	Closed source
License not stated	License not stated
No account needed	Not stated if an account is needed
Needs internet	Not stated if it works offline
Official website Full listing and sources Checked September 21, 2026	Official website Full listing and sources Checked October 2, 2026

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