Analyze the relationship between 'Magic Quadrant' and 'Gartner' within the context of the input sentence.
Options: creator, headquarters location, operator, original broadcaster

RingCentral , Inc. (NYSE:RNG), a leading provider of cloud business communication solutions, today announced that Gartner has recognized RingCentral as a leader in the Magic Quadrant for Unified Communications as a Service (UCaaS) Worldwide published on September 3, 2015.
creator