# Jigsaw Google's "tackle threats to open societies" unit (née Google Ideas, 2010) — builder of [[Prebunking]] campaigns (the van der Linden/Roozenbeek inoculation work at [[YouTube]] scale), Perspective API toxicity scoring, and Project Shield DDoS protection for newsrooms. In the vault as the corporate arm of the counter-disinformation toolkit, with the attendant who-decides questions.