CASTIS Named SK Broadband's ESG Excellence Partner

Beyond Technology, Toward Responsibility — The New Standard for Sustainable Partnership

CASTIS has been officially recognized as an ESG Excellence Partner by SK Broadband on November 26, 2025. More than a regular award, this recognition speaks to both the journey CASTIS has taken as a technology company and the direction it is heading.

What SK Broadband Means by 'ESG Excellence Partner'

SK Broadband, a wholly owned subsidiary of SK Telecom, operates South Korea's core media and fixed-line infrastructure—including IPTV (B tv), high-speed internet, and gigabit internet services. SK Group has made ESG integration across its supply chain a central management priority, extending the principles of sustainable business to its entire partner ecosystem. SK Telecom has earned the highest rating from the Korean Commission for Corporate Partnership for 13 consecutive years, establishing itself as an industry benchmark for co-growth.

SK Broadband defines its relationships with partners not merely as transactional but as a shared journey of sustainable growth. Through its ESG Excellence Partner program, the company systematically evaluates partners across environmental (E), social (S), and governance (G) dimensions, formally recognizing those that actively build ESG management capabilities. Concrete benefits accompany the designation — including interest-free loan programs, employee welfare support, and ESG consulting. The program reflects SK's broader philosophy of treating partners not as vendors to be managed but as stakeholders in a shared ecosystem.

CASTIS: Two Decades of Technology, One Foundation of Trust

Founded in 2000, CASTIS has grown alongside South Korea's leading telecom operators—KT, LG U+, and SK Broadband—delivering a media-specialized CDN, management solutions for media platforms. The company has been instrumental in building the technical infrastructure behind global media services. Beyond its technical depth, what distinguishes CASTIS is the technical reliability and trust earned over years of sustained partnership.

This recognition marks a significant milestone: CASTIS is no longer just a technology supplier. It has been formally acknowledged as a partner with an ESG management framework on par with that of a large enterprise — a standard increasingly demanded in today's business landscape.

For CASTIS, this recognition secures two strategic assets at once: a stronger foundation for its long-term partnership with SK Broadband and a market positioning as a technology company that pairs deep technical capability with credible ESG governance.

Twenty-seven years of trust built through technology. Now, a new pillar of responsible management stands alongside it. The next chapter for CASTIS is one to watch.