SLA's Enterprise Chat (ESChat) is a powerful communication system that allows for real-time push-to-talk and group text messaging. It is unique in that it is not tied to any specific carrier, allowing for cross-carrier communication. This feature-rich application is designed to meet the needs of serious professionals in the workforce. ESChat is a subscription-based service, but a free version is available for download on the Play store. This version offers a 30-day demo account, but for businesses looking to create an enterprise account, they can visit the ESChat website for purchasing information. ESChat sets itself apart from other push-to-talk networks by offering a wide range of capabilities that were previously unavailable. Its comprehensive product line is designed to meet the most demanding customer requirements. It is considered the top-performing and most feature-rich push-to-talk service currently available. Additionally, it is a cost-effective solution that can be quickly implemented in any enterprise environment. SLA provides a complete push-to-talk solution for businesses, including base station and vehicle-mounted radios, as well as interfaces to land mobile radio and public safety answering point networks. This allows for easy integration into existing and desired business practices. Some of the highlighted features of ESChat include real-time push-to-talk, group text messaging, user and group priority control, priority broadcast calling, and presence for groups and individual contacts. It also offers multiple group types, account management through both the handset and web, and encrypted account management transactions. Other features include late join on group calls, a PC-based dispatch client, and easy contact and group selection. The application also allows for group and user presence, floor control indication, and user and group management through both a web-based interface and the handset user interface. Additionally, it offers instant ad hoc group calling, enterprise administration through the web interface, and the ability to have large group sizes, including a maximum of 60,000 for preemptive priority emergency groups.