This study aims to conduct a comparative analysis of eight prominent online self-study platforms, namely Studyverse, Study Together, Bilibili, Twitch, Costudy, Lemon Study Room, Forest, and Flipd. Through the examination of the functions, characteristics, advantages, and disadvantages of online self-study platforms within their respective categories, this study seeks to address a research gap in comprehensive comparative studies of online self-study platforms. Each platform is analyzed in terms of its functionalities, social elements, gamification features, and personalization options. A comprehensive understanding of the landscape of online self-study platforms is provided by the findings of this study and empowers individuals to make informed choices based on their specific learning requirements and preferences. It can provide suggestions on enhancing self-study experiences in the digital age as well as implications about how to facilitate optimal platform selection for learners in the digital age.