The High-Luminosity Large Hadron Collider (HL-LHC) is expected to deliver the unprecedented integrated luminosity of 3 ab$^{-1}$ at the centre-of-mass energy of 14 TeV.
This will provide a unique opportunity in the Beyond-the-Standard-Model (BSM) search program to explore still unknown physics scenarios.
The full potential of the foreseen detector upgrades can be exploited by new specialised strategies to detect new physics phenomena.
In this context an overview of some of the BSM searches planned by the ATLAS and CMS experiments is addressed, highlighting the sensitivity reaches and the possible improvements with respect to the current Run-2 results.