Jeff Kostermans

Active Investor

Vice President of Marketing and Founder at LeadGenesys

San Francisco, California

Jeff Kostermans, Vice President of Marketing and Founder at LeadGenesys is an active investor based in San Francisco, California. This profile covers what Jeff Kostermans backs, at which stage, and how founders can reach out in 2026.

Investor type: AngelOperator
Stages: Pre SeedSeed
Invests in: Healthcare & BiotechSaaS & EnterpriseConsumer & RetailDeveloper Tools & DataMedia & ContentMarketplaceMarketing & AdTechSocial & Community
Location: San Francisco, California
Typical check: $150K
Past investments: 9

Notable investments

CyderGood Technology - Acquired by BlackberryBerkeley SkyDeckAdobeNewsWhipTaleo - Acquired by OracleLucidworksOracleZignal Labs

How to reach Jeff Kostermans

Angels and operators like Jeff Kostermans 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.

Frequently Asked Questions

What does Jeff Kostermans invest in?

Jeff Kostermans invests in Healthcare & Biotech, SaaS & Enterprise, Consumer & Retail and Developer Tools & Data, typically at Pre Seed and Seed. Match your sector and stage, then reach out with a personalized pitch.