esi

Estech Systems, Inc. (ESI) delivers high-performance business phone systems and cloud services that are simple, intuitive and uniquely integrated, backed by its superior technical support and available in multiple deployment models. Founded in 1987, the company has sold more than 350,000 systems. Through its network of certified ESI resellers, the company provides end-to-end solutions that give businesses the power to choose the features they want and need. ESI is a privately held corporation headquartered in Plano, Texas.