This contemporary and professional name is well suited to a hardware or security brand.
The word "Stacksync" contains nine characters and just two syllables. Two syllable names make popular global brands. Established brands using two syllable names include Boeing, Twitter and Hilton.
Stacksync.com is a dot com domain. Dot com domains are the most popular, and the most valuable. Once you own a dot com, it will be much easier to rank for your own name in Google.