Rubin Gruber

EXFO Service Assurance, Inc. provides voice over internet protocol services. It offers real-time performance management and service assurance solutions that allow carriers, service providers, cable companies, large enterprises and government agencies to build, operate and assure their VoIP networks and services. The company was founded in 1999 by Thomas J. Pincince and is headquartered in Chelmsford, MA.

Metrika, Inc. is a blockchain monitoring and analytics platform based in Cambridge, MA. The Metrika platform provides communities with end-to-end visibility and actionable insights into the health of blockchain networks. The platform isolates problems, takes action, and resolves issues faster with the industry's only monitoring and analytics platform built for decentralized networks. Users can explore community dashboards serving the blockchain ecosystem, including Ethereum network monitoring and analytics. Joining Metrika on Discord is also an option for those interested in making blockchain reliable. The company was founded in 2013 and Nikos Andrikogiannopoulos has been the CEO of the company since 2019.

GreenVolts, Inc. designs and develops concentrated photovoltaic technology. It provides solar power and related equipment. The company was founded by Robert Cart in 2005 and is headquartered in Fremont, CA.

Concerto Software, Inc. is used to designs, develops and provides customer interaction management (CIM) solutions. The solutions provided by the company enable companies to more effectively manage interactions with customers via voice, email, the Web and fax. The company was headquartered in Westford, MA.

Cambridge Telcom, Inc. provides telephone communication services. The private company is based in Geneseo, IL. The company was founded by Rubin Gruber.

Verivue, Inc. provided digital content delivery and distribution solutions. The firm specialized in bandwidth optimization, high quality video streaming, mobile data acceleration, content delivery network (CDN) management, and cloud edge optimization. The company was founded in 2006 and was headquartered in Westford, MA.