SAN FRANCISCO--(BUSINESS WIRE)--Zendesk, Inc. (NYSE:ZEN) was positioned by Gartner, Inc. in the "Visionaries" quadrant of the April 27, 2015, CRM Customer Engagement Center report. The Gartner Magic Quadrant report for Customer Engagement Centers is available at: https://www.zendesk.com/resources/2015-gartner-magic-quadrant-crm "Zendesk is the new face of customer service, and we believe our Magic Quadrant position reinforces our vision that today’s customer service leaders must innovate differ