Stamps.com - Version 1.1 Stamps.com is truly the easiest way to get postage, because you already have what you need: a PC, a printer, and an Internet connection. With Stamps.com you can send First-Class, Priority or Express Mail. You can even send packages and the software automatically determines the correct postage once you enter the weight. No hardware, no leases, No up-front fees, Free software, Free Welcome Kits, Free 24/7 customer support.