C1 Company Overview C1: 1 Contact, 1 Connection, 1 Choice C1 is the foremost, single-source provider of advanced communications and data technology for business. That means if it's digital, we connect our customers to it - from phone systems and hardware to computer networks, application development, managed solutions and more. And we're 100% passionate with designing, implementing, managing and supporting our customers' every need from end to end, so that they can focus on what they do best.