The ShopKeep software package includes a digital cash register and other tools that help with things like inventory and staff management. Businesses pay $49 a month per “register.” Merritt says it takes less than a year for the company to break even on a customer after accounting for what it spends on sales and marketing to acquire one. But charging for that product means it faces a higher hurdle to acquiring a new merchant than Square does. And its customer and revenue metrics show it. The company has 20,000 business customers and is projecting $30 million to $40 million in 2015 revenue. Square, on the other hand, says it has more than two million active merchants and did $560 million in sales in the first six months of 2015 alone.

http://recode.net/2015/11/05/shopkeep-the-anti-square-rounds-out-c-suite-with-eye-on-an-ipo/