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
- Artificial IntelligenceFintechHealthcare & BiotechDigital Health & HealthTechBiotech & PharmaMedTech & Medical DevicesSaaS & EnterpriseClimate & Energy
- 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 Accelerator.
Connect with Brian Koo
Frequently Asked Questions
What does Brian Koo invest in?
Brian Koo invests in Artificial Intelligence, Fintech, Healthcare & Biotech and Digital Health & HealthTech, 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 I contact Brian Koo?
Unlock Brian Koo's verified email on Round Funded Accelerator and send a personalized pitch. We surface only deliverable contacts so your outreach lands.