Vivaldi is a web browser for Windows, macOS, Linux, Android and iOS, based on Chromium (WebKit on iOS). It is known for extensive interface customisation, built-in blockers for ads, pop-ups and trackers, tab stacking, notes and keyboard shortcuts. The browser also includes an email client, a feed reader and a calendar. Vivaldi supports many Chrome extensions and can synchronise data between devices.
Vivaldi Technologies is registered in Norway and, according to Wikipedia, is employee-owned. Sync data is stored on Vivaldi's servers in Iceland, in Hringdu data centres; according to Vivaldi, each item is encrypted in the browser before it is sent. Iceland and Norway are part of the EEA. The source code is not fully open: the user interface is closed, while Chromium and the underlying components are open source. The browser is therefore distributed as proprietary freeware. No foreign parent company is mentioned.