This contemporary and professional name is well suited to a hardware or security brand.
Stacksync has nine letters and just two syllables. Two syllable names make popular global brands. Two syllable names are used by established brands like Apple, Pocket and Honda.
Stacksync.com is a .com domain. Dot com domains are the most valued domain extension in the world, used by famous websites like youtube.com. Once you own a .com, it will be much easier to rank for your own name in Google.