Rare decays at LHCb

Abstract Flavour-changing neutral-current processes, such as b → sℓ + ℓ −, are forbidden at tree level in the Standard Model and hence might receive comparatively large corrections from new particles. This proceeding paper highlights recent measurements from LHCb on b → sℓ + ℓ − and purely-leptonic decays, including tests of lepton flavour universality and searches for lepton flavour violation.