Status and prospects of rare decays at ATLAS and CMS

Recent results from rare flavour decays searches achieved using proton-proton collision data at s=13 TeV by ATLAS and CMS are presented. They include the studies of B^0 (ₒ) ^+^- decays carried out by both experiments and the first observation of the 4 double Dalitz decay by CMS using Run 2 data. The trigger strategies allowing for rare decays searches involving soft muons in Run 3 are also discussed.