This study investigates the feasibility of using chatbots as a content-based English learning and teaching tool. To this end, researchers asked 27 education experts to complete structured questionnaires about three chatbots: Cleverbot, Kuki, and ChatGPT. Based on their responses, the researchers concluded that ChatGPT demonstrates relatively superior performance in information provision and language proficiency but received a low rating for social skills and moral discernment. While existing chatbots such as Cleverbot and Kuki are programmed to hold everyday conversations, ChatGPT was developed with a deep learning method using a huge language model which empowered ChatGPT to provide a variety of information and have excellent multilingual abilities. Thus, ChatGPT can be used very effectively for content-based English learning and teaching through problem-solving activities, by utilizing its ability to provide information and to create learning and teaching materials. In addition, ChatGPT is expected to be used as a self-directed learning tool for learners and as a teaching aid for teachers in the future.