This contemporary and professional name is well suited to a hardware or security brand.
The name "stacksync" has nine characters and just two syllables. Two-syllable names are very rare and very valued. Leading companies using two syllable names include Boeing, YouTube and Gucci.
Stacksync.com is a dot com domain. Dot com domains are the most valued domain extension in the world, used by famous websites like facebook.com. When most people think of a website, they think of a dot com.