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 residents

A settlement platform for foreign residents in Korea — legal · labor · administrative support, built on payment technology

for small business

An AI workforce-management membership for small businesses — routine HR automation + expert matching for labor disputes

for any field

Real-time, domain-specific AI speech-to-speech (STS) interpretation — for any professional field: medical, construction, safety, and more

for worksites

Real-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