HEYHICOMPANY is a UX/UI design consulting and web/app development agency that began operating in 2019 and was incorporated in 2021, with headquarters in Seoul and a branch office in Bangkok. Over 7 years of practice, we have delivered projects for major enterprises and public institutions including CJ ENM, Lotte Card, Deloitte, Lina Insurance, and the Small Enterprise and Market Service of Korea.
Registered corporation, Republic of Korea
9F, Signature Tower, 100 Cheonggyecheon-ro, Jung-gu, Seoul
Hey, Hi Company BKK Co., Ltd. (2024)
UX/UI Design Consulting
User research, information architecture, journey mapping, and design systems for B2B SaaS, government, and enterprise platforms
Web Platform Development
Full-stack development on Next.js and NestJS. B2B SaaS, CMS, multi-tenant architecture, OTA integration, and analytics dashboards
Mobile App Development
Native and hybrid iOS and Android applications built with React Native and Flutter
Branding · 3D · Motion
Brand identity systems, 3D rendering, and digital advertising video production
CJ ENM · Lotte Card · Deloitte · Lina Insurance
Small Enterprise and Market Service (SEMAS, Republic of Korea)
Sangsang Square · newROUND · Ace Inventor · SNAX · LOGSYNK · Mainline · Chiloen · CHARGEV · MUZLIVE · and more
Industries
B2B SaaS
Media & Entertainment
Fintech & Finance
Government & Public
Healthcare
Education & E-learning
Technical Stack
Design — Figma
Web — Next.js, NestJS
Mobile — React Native, Flutter
Architecture — CMS, Multi-tenant
Integration — OTA, Analytics
Motion — 3D, GUI, Interactive
Recognition
2025 GDWEB Gold Prize
2024 ICT Award Korea Grand Prize
Minister of Science and ICT Award
2022 GDWEB Award Winner
2022 Good Design (GD) Selection
Certified Venture Company
Excellent Technology Evaluation Rating
Corporate R&D Center
Registered Industrial Design Firm
HEYHICOMPANY is a Seoul-based UX/UI design consulting and web/app development agency. Founded in 2019 and incorporated in 2021, operating for 7+ years with offices in Seoul (HQ) and Bangkok (Hey, Hi Company BKK Co., Ltd., established 2024), serving B2B clients across Korea, Southeast Asia, and Japan. Notable clients include CJ ENM, Lotte Card, Deloitte, Lina Insurance, and the Small Enterprise and Market Service of Korea. Specializations cover B2B SaaS, CMS, multi-tenant architecture, OTA integration, and analytics dashboards. Tech stack — Figma, Next.js, NestJS, React Native, Flutter. Certified Korean venture company, recognized with the 2025 GDWEB Gold Prize, the 2024 ICT Award Korea Grand Prize (Minister of Science and ICT Award), the 2022 GDWEB Award, and the Good Design Award.
Excellent Technology Evaluation Company Certificate
Industrial Design Specialist Company Registration Certificate
Corporate R&D Department Certificate
Direct Production Confirmation Certificate
(Editorial Design, Graphic & Art-related Services)
Venture Business Certificate
2025 GDWEB Gold Prize
2024 ICT Award Korea Grand Prize
2022 GDWEB WINNER
2022 Good Design (GD) Selection
OUR SERVICE
UX/UI Design(FIGMA)
WEB Development(Web-Next.js(React) NestJS(Node.js))
APP Development(React Native | Flutter)
3D, GUI, MOTION, INTERACTIVE
OUR PARTNERS
