About BYZ — Concierge Platform for Foreign Residents in Korea
BYZ Co., Ltd. (byourz.com) is a South Korea–based startup whose name stands for “By Your Side.”
For the era of the global citizen, BYZ operates Howto, a platform that helps foreign residents in Korea settle and live — resolving visa, labor, legal, and administrative challenges — powered by an AI real-time interpretation and transcription engine at its core.
Our interpretation technology originates from a disaster-prevention application program by Korea’s Ministry of Employment and Labor and KOSHA (Korea Occupational Safety and Health Agency).
We build domain-specific interpretation engines that go beyond general translation to accurately convey professional terminology in medical and industrial settings.
Company Information
- Legal name
- BYZ Co., Ltd. (바이즈 주식회사)
- Business Registration No.
- 779-88-03284
- Corporate Registration No.
- 110111-9023401
- Established
- March 2025
- Location
- E.Factory B-234, 11 Yeonmujang 15-gil, Seongdong-gu, Seoul 04783, South Korea
- Industry
- Information & Communications — software development and supply
Recognition & Credentials all publicly verifiable, CEO named
- Grand Prize, 13th Korea Knowledge Management Awards (Jan 2026) — news-wa · Bizworld
- Commissioner’s Award, Korea IP Office (won Jul 17, 2026, 15th Asia LOHAS Industry Expo) — 공감신문
- Selected for Korea Credit Guarantee Fund “Start-up NEST” (18th cohort) — 데일리경제
- Company profile on Saramin (major recruitment platform), CEO listed as Kim Hyoung Seok — profile
- 4 patent applications (foreign labor · interpretation · visa), searchable on KIPRIS: 10-2026-0006462, 10-2025-0206748, 10-2025-0165215, 10-2025-0165214
- MOUs with Chai Administrative Agency, The Bridge (migrant-worker rights), and Eduwill · 10+ LOIs · 23 businesses in beta
Products — the Howto platform
for residentsA settlement platform for foreign residents in Korea — legal · labor · administrative support, built on payment technology
for small businessAn AI workforce-management membership for small businesses — routine HR automation + expert matching for labor disputes
for any fieldReal-time, domain-specific AI speech-to-speech (STS) interpretation — for any professional field: medical, construction, safety, and more
for worksitesReal-time interpretation for migrant-worker occupational safety — rooted in the KOSHA disaster-prevention program
Our Mission
Always by your side.
BYZ helps foreign residents live conveniently and with their rights protected in a new country, and supports the small businesses and institutions that host them.
- For foreign residents (Howto) — visa rights analysis, labor·legal·administrative help, and medical, finance, and everyday-life support, with real-time domain-specific interpretation.
- For small businesses (Howto: Works) — an all-in-one labor & attendance membership: two expert consultations per month included, members-only legal fees, and foreign-employee support (visa, interpretation).
- As a public good — free interpretation for language-vulnerable groups: migrant workers, single-nurse rural health posts, and multicultural patients who otherwise cannot access professional interpretation.
Team
BYZ brings together executives from Korea's leading tech companies.
※ All members are enrolled in Korea's four major social insurances.
Leadership (C-level)4
Hyoung Seok Kim —
Founder·CEO (former CEO of LOE; former CEO of Woori Visa) —
Linkedin Chang Yeon Kim — CTO (former dev lead at Dabang; co-founder & CTO of Sugarhill/Nemo · 16+ years)
Moo Jin Hyun — COO (former Head of Management Planning at NCSOFT; CEO of Entriv; formerly at SKT)
Yoon Hwan Ko — CPO (Planning & Dev; former dev lead at Neowiz, Gamevil, and Gamfs; 19+ years)
Core team5
Han Sol Choi — Design & Planning (Sugarhill/Nemo · Pixel Monster; 7+ years)
Su A Park — Operations & Marketing (Cloudworks · Brandi; 5+ years)
Han Yong Lee — Operations & Sales (former CEO of Ybooks; 15+ years)
Dong Sang Yoon — Planning & Marketing (Yanolja · Coupang service planning; 7+ years)
Maryna Holub (Maryna Holub) — Planning & Marketing (Samsung SDI; 4+ years)
Advisors & Outside Directors5
Cheon Uk Hyun — Senior Advisor (Kim & Chang, lead labor & employment attorney; 46+ years)
Tae Hwan Kim — In-house Advisor (CEO of Wepick Corporation; adjunct professor, Hansung Univ.)
Seok Gi Lim — In-house Advisor (Advisor at Daeryun Aju; former National Assembly Secretariat)
Yu Soon Han — Outside Director (founder of Dabang; former CEO of Connect Pi Cloud)joining after 2026-09
Seong Min Park — Outside Director (co-founder & CMO of Dabang · Nemo · DDOCDOC)joining after 2026-09