RubyRide might seem like a taxi service at first glance, but its cars really only have one thing in common with the typical cab: call for one, and you'll receive a prompt ride anywhere. Beyond that, differences abound. RubyRide clients don't pay by the mile, for instance. Thanks to the company's subscription-based plan, they pay by the month. In return, they get unlimited rides in eco-friendly hybrid cars, with the option of scheduling in advance or even scheduling a sequence of recurring trips—such as a Wednesday trip to the grocery store.