ESTsoft is a South Korean AI and software company that has developed a comprehensive digital human platform under the brand PERSO.ai. Their offerings include Perso Studio and Perso Live, which enable the creation and deployment of conversational AI humans integrated with technologies like ChatGPT. These AI humans can serve as tutors, hosts, interpreters, and fitness coaches, supporting multilingual speech, real-time video synthesis, and personalized avatars. ESTsoft's digital human solutions are used across industries, including education, finance, broadcasting, and marketing. The company has partnered with major institutions such as Microsoft and YBM and has created well-known virtual figures like "AI anchor Park Eun-bo" and "AI persona Kim Iso." ESTsoft’s technology combines facial synthesis, voice generation, and natural language processing to deliver highly interactive virtual beings for both enterprise and consumer use.