Both are good but different
From reading this I prefer Komprise since they don't mess with your storage system except with the old unused files are moved to the capacity storage leaving a link behind. I expect if you don't want a file moved you can tag it so it stays on primary storage. I expect you could easily add this to an existing live computer system to free up some space.
Infinite-IO sounds like a much more sophisticated system with greater benefits and greater risks. All storage is behind their system so would be much more disruptive to set up on an existing computer system. If building a new one from scratch then it would be a pretty good thing. But as Krishna indicates if you lose a bit of it you can't just read the files off the drive, you need that propitiatory system running to get access to your data.
Biting the hand that feeds IT
