This catchy and easy to pronounce brand name is a blend of the words "stack" and "mate".
StackMate has nine letters and just two syllables. Two syllable names make popular global brands. Two syllable names are used by established brands like Boeing, Gillette and Pocket.
Stackmate.com is a dot com domain. Dot com domains are the most valued top-level-domain in the world, famously used by websites like facebook.com. Once you own a dot com, it will be much easier to rank for your own name in Google.