OutlierKit
6.9#3 in youtube seo toolsFrom $299 a yearWebAPIExtension
VisitOutlierKit suits creators and teams researching YouTube niches, competitors, keywords, scripts, sponsors, or monetization. The site identifies faceless creators, educators, personal brands, B2B creators, agencies, and multi-channel teams as audiences.
YTTagGen may suit YouTube creators who want tag ideas from a title or topic without signing in. It supports regular videos and Shorts across niches and languages.