SK Telecom plans to invest $14.8 million in TimeTree, a Japanese company that runs a calendar-sharing app.
Through the agreement signed Friday in Tokyo, SK Telecom will seek to expand its AI agent service ecosystem and strengthen its presence in the Japanese AI market, it said.
TimeTree runs a calendar-sharing app called TimeTree, which has about 67 million users worldwide and continues to grow quickly.
Through this strategic partnership, SK Telecom plans to use its AI agent technology and experience in commercializing it, developed through its platform ‘A.’ (A-DoT)—and apply it to TimeTree.
This includes using the ‘Agentic Workflow’, which was first implemented in A. in August 2025. The deal is also the first time SK Telecom’s AI agent technology will be used in an overseas service.
Agentic Workflow is a system where an AI agent does more than follow a user’s instructions. It can set goals based on the user’s past activities and plan and carry out the steps needed to achieve them. This approach is recognized in the industry as an important way to improve AI agent performance.
SK Telecom plans to add features like proactive suggestions and personalized calendar management to the TimeTree app. In the future, the company aims to transform the app into an active AI platform that recommends the best activities and events tailored to each user’s schedule, habits, and preferences.
“The essence of TimeTree’s AI agent is to use schedules as natural action triggers. SK Telecom recognized both our unique approach and the value of our 67-million-user dataset, making SK Telecom not only our lead investor but also a true strategic partner,” said Chajin Park, CEO of TimeTree. “This alliance marks a turning point as we expand from Japan to Korea and beyond, leading a new paradigm of schedule-centered AI.”
“Partnering with TimeTree offers SK Telecom a powerful opportunity to extend our AI agent technologies into global markets,” said Ryu Young-sang, CEO of SK Telecom. “Together, we will expand the AI ecosystem across Korea, Japan and beyond.”
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