Brian Koo
Venture investor in Los Altos
Los Altos, California
Brian Koo, Venture investor in Los Altos is an active investor based in Los Altos, California. This profile covers what Brian Koo backs, at which stage, and how founders can reach out in 2026.
- Investor type
- VCPE
- Stages
- SeedSeries ASeries BLate Stage Venture
- Invests in
- Robotics & AutomationHealthcare & BiotechSaaS & EnterpriseFoodTech & AgricultureMarketplaceConsumer Goods (CPG)
- Location
- Los Altos, California
- Typical check
- $2M
- Past investments
- 73
Notable investments
Collective Health
Worklife
NylasNyansaFarmigo
ZanbatoVertical Mass
Casetext
SKULLYImagene Labs
Bolt ThreadsHow to reach Brian Koo
Angels and operators like Brian Koo reply to specific, personalized notes that show real traction, not mass blasts. Build a verified list, write a note that fits their thesis, and track replies, all on Round Funded.
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About this profile
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Cite this page
Round Funded. "Brian Koo." Round Funded investor database, updated September 9, 2026.
Stable URL, it will not change: https://www.roundfunded.com/en/investor/brian-bonwoong-koo
Frequently Asked Questions
What does Brian Koo invest in?
Brian Koo invests in Robotics & Automation, Healthcare & Biotech, SaaS & Enterprise and FoodTech & Agriculture, typically at Seed, Series A, Series B and Late Stage Venture. Match your sector and stage, then reach out with a personalized pitch.
What stage does Brian Koo invest at?
Brian Koo typically invests at Seed, Series A, Series B and Late Stage Venture. Lead with traction that fits the stage when you reach out.
What is Brian Koo's typical check size?
Brian Koo typically writes checks around $2M. Use it as a signal for whether your raise fits their stage.
How do founders reach investors like this?
Round Funded lists active investors with verified, professional contact details for signed-up founders. Filter by sector, stage and location, then send a personalized pitch from your own inbox.
What is Round Funded?
Round Funded is an investor database and outreach platform for startup founders. It lists 60,000+ active investors with verified contacts, filtered to recent investment activity, and lets founders send personalized pitches from their own Gmail, track replies, and share a free Data Room. Round+ starts at $99 per month with a 3-day trial.