David A. Ulevitch (born December 10, 1981) is founder and CEO of the enterprise security company OpenDNS (acquired by Cisco) and founder of EveryDNS (acquired by Dyn). Since December, 2016, Ulevitch has been the Senior Vice President and General Manager of Cisco's Security Business.
While a student at Washington University, Ulevitch created EveryDNS to fill his need for web-based DNS management software. EveryDNS grew from a personal project to a service with nearly 100,000 users worldwide within a few years. In January, 2010, EveryDNS was acquired by Manchester, NH company, Dyn, Inc.
In July, 2006, Ulevitch launched OpenDNS, a recursive DNS service focused on performance and security. On June 30, 2015 Cisco announced that it was buying OpenDNS for $635 million.