Jon Karlen
Angel investor in Boston
Boston, Massachusetts
Jon Karlen, Angel investor in Boston 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
- SaaS & EnterpriseEdTechConsumer & RetailHealthcare & Biotech
- Location
- Boston, Massachusetts
- Typical check
- $1M
- Past investments
- 17
Notable investments
Teachable
Zing SystemsConvokeVirtual ComputerMadeiraMadeira
infracommerce
Digital LumensRestorando
Yogome
PillPack
KlaviyoHow 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 Accelerator.
Connect with Jon Karlen
Frequently Asked Questions
What does Jon Karlen invest in?
Jon Karlen invests in SaaS & Enterprise, EdTech, Consumer & Retail and Healthcare & Biotech, typically at Pre Seed, Seed, Series A and Series B. Match your sector and stage, then reach out with a personalized pitch.
What stage does Jon Karlen invest at?
Jon Karlen typically invests at Pre Seed, Seed, Series A and Series B. Lead with traction that fits the stage when you reach out.
What is Jon Karlen's typical check size?
Jon Karlen typically writes checks around $1M. Use it as a signal for whether your raise fits their stage.
How do I contact Jon Karlen?
Unlock Jon Karlen's verified email on Round Funded Accelerator and send a personalized pitch. We surface only deliverable contacts so your outreach lands.