"Z" monogram logo

Hey guys, this is my first post on Dribbble, recently I decided to work on a personal project redesigning a chat application branding which needs a "Z" monogram for its logo and application icon.
I try to capture a look that expresses "connection", "chat bubbles", "messages", "technology", "modern" and "friendly", here are the results that I pick from my sketches. Hope you enjoy it.