Lightspeed Retail is a retail PoS system from Lightspeed headquartered in Quebec. Core retail POS features are expanded on higher service tiers with ecommerce option and payments gateway, an accounting system, and a customer loyalty program.
Square POS is a point-of-sale software solution with features such as accept credit cards with your iPhone, Android, and iPad along with the flexibility to accept credit card payments anywhere, from Square headquartered in San Francisco, California.
Shopify is a commerce platform designed for both online stores and retail locations. Shopify offers a professional online storefront, a payment solution to accept credit cards, and the Shopify POS application to power retail sales.