About CornerStone

CornerStone Telephone Company is an integrated communications provider specializing in services for business and education customers.  Our mission is to serve our clients by providing reliable communications solutions from a proven telecommunications partner, including telephone, Internet, hosting, and SkySphere. We offer our clients the best software and networks available, all supported by unrivaled customer service and technical support teams.  CornerStone has over 50,000 access lines, providing local and long distance telephone service, high-speed Internet access, VoIP, security services and business telephone systems.  The company services customers in New York, Massachusetts and Pennsylvania.

Established in 2001, CornerStone has over 100 employees and 10,000 customers.  The company is headquartered in Troy, N.Y. with offices in Syracuse, Oneonta, Buffalo, New York City, Poughkeepsie, and  Richmond, Massachusetts and was voted fastest growing mid-size company and one of the Best Places to Work in the New York State Capital Region in 2007 and 2008.