John Vrionis
Founder and Managing Partner at Unusual Ventures
Menlo Park, California
John Vrionis, Founder and Managing Partner at Unusual Ventures is an active investor based in Menlo Park, California. This profile covers what John Vrionis backs, at which stage, and how founders can reach out in 2026.
- Investor type
- VCPEFinance OperatorOperatorFounderInvestor
- Stages
- Early Stage VenturePre SeedSeedSeries A
- Invests in
- SaaS & EnterpriseCybersecurity
- Location
- Menlo Park, California
- Typical check
- $375K
- Past investments
- 39
Notable investments
Arctic WolfCitadel Defense CompanyTranspositArmorbloxOloid
STEEZYEmbrane
Illumix
Banyan Security
VivunArrikto
WinnieHow to reach John Vrionis
Angels and operators like John Vrionis 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.
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About this profile
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Cite this page
Round Funded. "John Vrionis." Round Funded investor database, updated September 23, 2026.
Stable URL, it will not change: https://www.roundfunded.com/en/investor/john-vrionis
Frequently Asked Questions
What does John Vrionis invest in?
John Vrionis invests in SaaS & Enterprise and Cybersecurity, typically at Early Stage Venture, Pre Seed, Seed and Series A. Match your sector and stage, then reach out with a personalized pitch.
What stage does John Vrionis invest at?
John Vrionis typically invests at Early Stage Venture, Pre Seed, Seed and Series A. Lead with traction that fits the stage when you reach out.
What is John Vrionis's typical check size?
John Vrionis typically writes checks around $375K. Use it as a signal for whether your raise fits their stage.
How do founders reach investors like this?
Round Funded lists active investors with verified, professional contact details for signed-up founders. Filter by sector, stage and location, then send a personalized pitch from your own inbox.
What is Round Funded?
Round Funded is an investor database and outreach platform for startup founders. It lists 60,000+ active investors with verified contacts, filtered to recent investment activity, and lets founders send personalized pitches from their own Gmail, track replies, and share a free Data Room. Round+ starts at $99 per month with a 3-day trial.