Lots of services have sprung up allowing you to rate business and service providers. Tello thinks the people who work at those businesses deserve ratings of their own. To that end, the company is ...

The next time you buy a couch, a car or a caffelatte, you can tell management what you think of the service with a stroke of your iPhone. The Tello app lets you give a quick thumbs up or thumbs down ...

A little over a year after Urban Airship’s acquisition of location startup SimpleGeo, the company has moved to once again expand its feature set by acquiring venture-backed Tello in an all-stock deal.