Akritai were locals who were to be used as the defenders of the borders instead of deploying regular Army or mercenaries. For this reason they were given land (so as to have skin in the game) and tax breaks. When the tax breaks stopped the Akritai rapidly vanished. These are also mentioned in Wikipedia pages.
So, in terms of a security project an Akritas would be you running an EDR agent on a machine that you own, not some of the signatory companies who basically do not own anything on the edge (end user equipment).