Abstract: With the discovery of the Higgs boson the question arises of the means of investigation of this unique spin zero particle, as well as possibly using it as portal to discovery of the solution to some of the burning questions of particle physics today.
The present and future 'Higgs Factory' accelerators: HL-LHC, linear e+e- colliders, circular colliders (CEPC/FCC-ee), muon collider, and finally the 100 TeV FCC-hh will be reviewed. It will be shown that the most powerful combination is the Future Circular Collider complex under study at CERN, hosting in a first step a high luminosity, 90-350 GeV circular e+e- collider, with the ultimate goal of hosting a 100 TeV pp collider.