Mainstreet Ventures Research
Investment Thesis
Mainstreet Ventures (MSV) is the venture capital arm of Mainstreet, a Seoul-based investment group that also runs Mainstreet Investment, a private equity business covering growth, pre-IPO, buyout and mezzanine deals. MSV describes itself as a venture capital firm investing in early to growth-stage technology companies, backing visionary entrepreneurs who dare to disrupt the status quo. Its stated belief is that technology creates the future and that the future needs to be distributed to the globe, so it pairs deep industry expertise with global networks to help Korean founders expand abroad.
Stage Focus
The firm lists Seed, Series A-B, Deep Tech and Global Expansion as its focus. Public records show it also participates in Series A rounds, for example a June 2026 Series A in Innertron reported by TheVC. Check sizes are not published; funds are small relative to US peers, so initial checks are likely modest.
Check Size
No check size is disclosed on the site. Fund sizes (KRW 31.5B and KRW 51B vehicles) suggest checks in the low single-digit millions of USD at most. Treat as unknown.
Sector Focus
MSV lists six focus areas:
- AI and Digital: AI models, quantum computing, cybersecurity, next-gen communications
- Manufacturing and Robotics: advanced robotics, aerospace, maritime, mobility, defense
- Pharma and Bio: biotech, healthcare, pharmaceuticals, medical devices
- Advanced Materials: semiconductors, new materials, displays, sensors
- Carbon and Energy: next-gen energy, secondary batteries, carbon neutrality
- Content and IP: fandom tech, brand, global IP
Lead Tendency
The site does not say whether MSV leads rounds. As a Korea Fund of Funds (KVIC) general partner running thematic funds, it likely leads or co-leads smaller rounds, but this is unverified, so lead tendency is recorded as unknown.
Recent Activity and Fund History
- 2021: registered as a Startup Accelerator under the Venture Investment Act
- 2022: launched the MS T-One Lifestyle Fund
- 2024: registered as a Venture Capital Firm; selected as GP by the Korea Fund of Funds (KVIC); formed MSV Global Brand Fund I (KRW 31.5B)
- 2025: selected as KVIC GP for the Deep Tech and Culture sectors; launched the MSV Prime Deep Tech Fund and the Hana Ventures Co-Investment Fund
- 2026: named Best Rookie House at the Korea Venture Capital Awards; closed the MSV Culture Purple Ocean Fund (KRW 51.04B, April 2026); cumulative AUM passed KRW 150B (roughly USD 105-110M)
The firm is actively deploying across several funds.
Portfolio Highlights
Selected companies shown on the site: Mono Labs, Dataframe, Door Labs, Mystery Pictures, Woojoo Yakbang, Library Company, Wonderwall, Alpaca, 10min Reading, Fanddle and ZenLedger. Featured case studies are Be My Friends (fandom tech from the team behind HYBE's Weverse), UA Robotics (AI dental implant surgical robot) and Simplycare Bio (DHA-enriched livestock feed technology). No exits are disclosed.
Team
- Soonwoo Park, CEO and Founder: Korea University business administration; former executive at Alibaba, VP at The9 (NASDAQ), Managing Director at LB Investment
- Jonghwa Choi, Managing Director: 16 years in venture capital and 10 in startups; former VP at Mobilix Partners, Head of VC at Wonik Investment Partners, co-founder of AVANCERA
- Jaemyung Lee, Director: biotechnology degree from Yonsei, MA in media management; ex Blizzard Entertainment Korea, Nexon, and VC at Atinum Investment
Decision Process
Not published. A small partnership team with the CEO and founder as the lead decision maker is the likely structure. Warm intros are probably helpful, as with most Korean funds.
Founder Preferences
Visionary entrepreneurs who dare to disrupt the status quo, with technical depth and global ambition; the firm stresses helping Korean companies expand globally and relies on partnerships with Korean institutional investors.
Geographic Focus
Based in Gangnam, Seoul. Portfolio is predominantly Korean, with the stated aim of global expansion. Contact: [email protected], +82-2-569-9181.