Kosim International is a global communications technology company
built on proprietary eSIM technology, leading KOSIM—
a next-generation data roaming platform that connects the world.
Borderless connection,
designing innovation that crosses borders through technology.
Chosen by over 100,000 users worldwide, KOSIM sets a new standard for global connectivity with industry-leading eSIM technology
and is growing rapidly.
We work to deliver seamless, fair connectivity anytime, anywhere,
expanding our reach across global markets beyond borders.
Anywhere in the world,
eSIM—your travel essential
Global Roaming Service
KOSIM
Without complex roaming or swapping SIM cards, we connect you instantly in 149 countries with one tap—innovative connectivity so you can focus on the joy of travel. We offer a fast, stable digital roaming solution.
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Where travelers gather,
a community space
Travel Community
Tteona
Stop planning alone. Meet the right travel companion based on your dates and preferences. We connect you with like-minded travelers to design a safer, richer journey—a new community travel experience.
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Travel without language barriers,
smart call handling
Local Concierge Service
SmoothCall
Difficult phone reservations in an unfamiliar language—SmoothCall handles them for you. From restaurant bookings to detailed hotel requests, local language experts relay your needs accurately for smooth communication abroad.
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