Estech Systems, Inc. (ESI)

Estech Systems, Inc. (ESI) is a leading provider of high-performance business phone systems, headquartered in Plano, Texas. Founded in 1987, ESI delivers innovative cloud and on-premises VoIP and Access Control solutions, helping growing businesses enhance communication and collaboration.

We serve a diverse range of clients, including educational institutions, healthcare providers, law firms, and non-profit organizations, addressing their unique communication needs with tailored solutions. Our goal is to simplify complex communication challenges and empower businesses to connect effectively with their customers and teams.

What sets ESI apart is our commitment to providing a seamless and integrated experience, combining robust features like cloud VoIP, on-premises solutions, SIP trunking, and advanced security. We’ve been a trusted partner for over three decades, consistently delivering reliable performance and exceptional support.

As a Crexendo® company, we leverage cutting-edge technology and a dedicated team to ensure our clients receive the best possible communication solutions. We offer a comprehensive suite of products and services, including eCloud PBX™, eSIP Evolution Series™, and eSIP-as-a-Service™, all designed to meet the evolving needs of modern businesses.