Jon Karlen

Active Investor

Founder and Chairman at Acadian Software

Boston, Massachusetts

Jon Karlen, Founder and Chairman at Acadian Software is an active investor based in Boston, Massachusetts. This profile covers what Jon Karlen backs, at which stage, and how founders can reach out in 2026.

Investor type: AngelVCPEInvestment Partner
Stages: Pre SeedSeedSeries ASeries BLate Stage Venture
Invests in: Healthcare & BiotechDigital Health & HealthTechBiotech & PharmaMedTech & Medical DevicesSaaS & EnterpriseConsumer & RetailE-commerce & D2CIoT & Connected Devices
Location: Boston, Massachusetts
Typical check: $1M
Past investments: 17

Notable investments

ROLLER SoftwareTeachableZing SystemsConvokeVirtual ComputerMadeiraMadeirainfracommerceDigital LumensRestorandoYogomePillPackKlaviyo

How to reach Jon Karlen

Angels and operators like Jon Karlen 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 Jon Karlen invest in?

Jon Karlen invests in Healthcare & Biotech, Digital Health & HealthTech, Biotech & Pharma and MedTech & Medical Devices, typically at Pre Seed, Seed, Series A and Series B. Match your sector and stage, then reach out with a personalized pitch.