Kosim International — a global digital platform connecting travel and mobility
KOSIM INTERNATIONAL redesigns travel infrastructure so communications, itineraries, and local calling stay reliable across borders. We reduce SIM-swap friction, language barriers, and fragmented travel tools into a clearer product experience.
What we build
Our core services are KOSIM (eSIM global data roaming), TTEONA (travel-mate matching by plans and preferences), and SmoothCall (local-language calling and booking assistance). Each product works on its own and also fits a single journey before, during, and after travel.
KOSIM is designed for data activation in about three minutes across 149 countries. TTEONA helps travelers find companions; SmoothCall supports restaurant and hotel calls with AI interpretation. See the Business page for deeper product detail.
Trust & contact
Headquarters: 406-7, 80-16 Golden Route-ro, Juchon-myeon, Gimhae-si, Gyeongnam, Republic of Korea. Tel: +82-1555-2440. Email: contact@kosim.co.kr. For partnerships, marketing, and sales, use the Contact form or the published email — we respond as quickly and accurately as we can.
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Explore further
CEO Message, Vision, History & Awards, Partners, and Location live under Company navigation. Careers are listed on the Hero page and our external recruiting portal.