Charles Callahan
Managing Partner at Triangle Venture Partners, LLC
San Francisco, United States
Charles Callahan, Managing Partner at Triangle Venture Partners, LLC is an active investor based in San Francisco, United States. This profile covers what Charles Callahan backs, at which stage, and how founders can reach out in 2026.
Triangle Venture Partners, LLC works with startups and lower middle market firms seeking growth strategy assistance, new growth opportunities, and M&A strategy.
Charles Callahan invests in SaaS & Enterprise, Fintech, Digital Health & HealthTech and Media & Content, typically at Early Stage Venture and Late Stage Venture.
- Location
- San Francisco, United States
- Typical check
- $3.8M
What does Charles Callahan invest in?
- Investor type
- VCPE
- Stages
- Early Stage VentureLate Stage Venture
- Invests in
- SaaS & EnterpriseFintechDigital Health & HealthTechMedia & Content
Where is Charles Callahan based?
Charles Callahan is based in San Francisco, United States.
- Browse more startup investors near Charles Callahan:
- Startup investors in San FranciscoStartup investors in the United States
How to reach Charles Callahan
Angels and operators like Charles Callahan 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. "Charles Callahan." Round Funded investor database, updated September 22, 2026.
Stable URL, it will not change: https://www.roundfunded.com/en/investor/charles-callahan
Frequently Asked Questions
Who is Charles Callahan?
Charles Callahan, Managing Partner at Triangle Venture Partners, LLC is an active investor based in San Francisco, United States. Charles Callahan invests in SaaS & Enterprise, Fintech, Digital Health & HealthTech and Media & Content, typically at Early Stage Venture and Late Stage Venture.
What does Charles Callahan invest in?
Charles Callahan invests in SaaS & Enterprise, Fintech, Digital Health & HealthTech and Media & Content, typically at Early Stage Venture and Late Stage Venture. Match your sector and stage, then reach out with a personalized pitch.
What stage does Charles Callahan invest at?
Charles Callahan typically invests at Early Stage Venture and Late Stage Venture. Lead with traction that fits the stage when you reach out.
What is Charles Callahan's typical check size?
Charles Callahan typically writes checks around $3.8M. Use it as a signal for whether your raise fits their stage.
Where is Charles Callahan based?
Charles Callahan is based in San Francisco, United States.
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.
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