CornerStone Telephone Company is a group of telecommunication and customer service professionals dedicated to providing the best communication and networking solutions to business and enterprise customers, including: telephone, Internet, hosting, data center, cloud computing, and business services. We serve our clients by providing reliable business communications solutions, supported by unrivaled customer service and technical support teams.
Our dedication to this mission has lead to success. Established in 2001, CornerStone has grown to over 120 employees and 10,000 customers in New York, Massachusetts and Pennsylvania. Our company headquarters are located in Troy, NY, with regional facilities, customer service and support locations in Syracuse, Oneonta, New York City, Poughkeepsie and Richmond, Mass. CornerStone was ranked, as one of the fastest growing private companies in the United States, on the Inc. 5000 lists in 2007, 2008, and 2010, and is recognized by the Business Review as one of the Capital Region's Best Places to Work. – less–ZoomInfo