Tuff Yen
Angel investor in San Mateo
San Mateo, California
Tuff Yen, Angel investor in San Mateo is an active investor based in San Mateo, California. This profile covers what Tuff Yen backs, at which stage, and how founders can reach out in 2026.
- Investor type
- AngelVCPEInvestor
- Stages
- Early Stage Venture
- Invests in
- Artificial IntelligenceFintechHealthcare & BiotechDigital Health & HealthTechBiotech & PharmaMedTech & Medical DevicesSaaS & EnterpriseCrypto & Web3
- Location
- San Mateo, California
- Typical check
- $500K
- Past investments
- 36
Notable investments
SyntiantOrcaBio
ICON Aircraft
Birdi
Cambrian Genomics
Credible
Life360ShortFormTriptrotting
MixRank
Digbi Health
IMVUHow to reach Tuff Yen
Angels and operators like Tuff Yen 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 Tuff Yen
Frequently Asked Questions
What does Tuff Yen invest in?
Tuff Yen invests in Artificial Intelligence, Fintech, Healthcare & Biotech and Digital Health & HealthTech, typically at Early Stage Venture. Match your sector and stage, then reach out with a personalized pitch.
What stage does Tuff Yen invest at?
Tuff Yen typically invests at Early Stage Venture. Lead with traction that fits the stage when you reach out.
What is Tuff Yen's typical check size?
Tuff Yen typically writes checks around $500K. Use it as a signal for whether your raise fits their stage.
How do I contact Tuff Yen?
Unlock Tuff Yen's verified email on Round Funded Accelerator and send a personalized pitch. We surface only deliverable contacts so your outreach lands.