This relaxed, calm and playful name would be well suited to a professional networking, social or travel organisation.
The name "carpooly" has eight letters and three syllables. Three syllable names are used by established brands like Delicious, Santander and Mastercard.
Carpooly.com is a dot com domain. Dot com domains are the most sought after top-level-domain in the world, famously used by websites like google.com. Once secured, a dot com all but guarantees no-one else can outrank you for your own name in the long run.