Welcome to the forefront of conversational AI as we explore the fascinating world of AI chatbots in our dedicated blog series. Discover the latest advancements, applications, and strategies that propel the evolution of chatbot technology. From enhancing customer interactions to streamlining business processes, these articles delve into the innovative ways artificial intelligence is shaping the landscape of automated conversational agents. Whether you’re a business owner, developer, or simply intrigued by the future of interactive technology, join us on this journey to unravel the transformative power and endless possibilities of AI chatbots.
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The artificial intelligence (AI) chatbot service that users used for the longest time in Korea last month was Scatterlab’s “Zeta,” not ChatGPT.
ChatGPT is still overwhelming in the number of users, but services that are enjoyed by exchanging conversations with AI characters like Zeta are gaining high popularity in the 10s and 20s.
The AI utilization paradigm is rapidly expanding beyond simple information search and productivity improvement to the realm of emotional communion and entertainment.
According to WiseApp and Retail, an application (app) data analysis platform, ChatGPT ranked first with 18.44 million monthly users as of June 2025.
Scatterlab’s Zeta (3.4 million), Luton (2.45 million), and Purple Lexity (1.71 million). Anthropic’s Claude was ranked 8th and 9th respectively, with 420,000 and Elon Musk-founded xAI’s Grok recorded 360,000.
However, in terms of monthly usage time that can compare users’ stay time, Zeta ranked first with 52.48 million hours. ChatGPT, the runner-up, recorded 42.54 million hours. In addition, Luton’s AI character chat service “Crack,” which ranked 10th in the user ranking, rose to third place with 6.41 million hours of use.
Zeta is a kind of game and interactive web novel content that users enjoy while producing AI characters with various settings and stories and talking to various characters like a situational play.
Unlike ChatGPT, which uses a lot of information search and business purposes, Zeta is considered to have a relatively large amount of time for users as it has established itself as a kind of entertainment content.
When estimating the average monthly usage time per user, ChatGPT users spent an average of 2.3 hours per month, while Zeta users spent an average of 17.3 hours per month using Zeta.
This trend includes users in their 10s and 20s who are relatively familiar with AI and have low psychological resistance. In the case of Zeta, almost 90% of all users are teenagers and people in their 20s.
Not only Zeta, but also Luton’s Cracks are characterized by emotional exchange with the desired character after the user sets AI’s tone, personality, and worldview in detail.
The younger generation, who are accustomed to using AI, shows a pattern of building bonds by talking to these characters like friends and lovers, and the popularity of these apps seems to continue. Looking at the ranking of AI characters in Zeta, academy characters such as “High School Iljinyeo” aimed at the younger generation are popular.
Meanwhile, Chatty, which ranked fifth in usage time, is also a chat-type novel app, a new format in which users read web novels while talking with AI.
Naver Webtoon also operates a “Character Chat” service that enables users to talk to characters by implementing characters in webtoons with AI, and about half of the users are teenagers.
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