theking2 I'd love you to get in touch with the people at Vivaldi to get Kagi search in the list. Currently a number of free advertise based search engines is available on Vivaldi. I'd love you to get in touch with the people at Vivaldi to get Kagi search in the list. It will generate revenue for Kagi as well.
tux0r Everyone could file a feature request with Vivaldi, their forums usually get some recognition in their bug tracker. 🙂 FWIW, I use Vivaldi with Kagi on iOS. I added it on the desktop and it was synchronised via my Vivaldi account just well.
tux0r I have just checked it in their Jira: There is an open task "Integrate Kagi Search as a Search Partner" for Vivaldi, started in January, unresolved yet. So there is no reason for the Kagi team to act here. 🙂