Brian Halligan
Co-founder & Partner at Propeller
Cambridge, Massachusetts
Brian Halligan, Co-founder & Partner at Propeller is an active investor based in Cambridge, Massachusetts. This profile covers what Brian Halligan backs, at which stage, and how founders can reach out in 2026.
- Investor type
- AngelVCPEInvestment PartnerFounderInvestor
- Stages
- Early Stage VentureSeedSeries A
- Invests in
- SaaS & EnterpriseArtificial IntelligenceMarketing & AdTech
- Location
- Cambridge, Massachusetts
- Typical check
- $500K
- Past investments
- 9
Notable investments
Blissfully
Appcues
DriftOneScreen.AI
Crayon
HubSpot
Tettra
Searchable.ai
Sequoia CapitalHow to reach Brian Halligan
Angels and operators like Brian Halligan 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. "Brian Halligan." Round Funded investor database, updated September 28, 2026.
Stable URL, it will not change: https://www.roundfunded.com/en/investor/brian-halligan
Frequently Asked Questions
What does Brian Halligan invest in?
Brian Halligan invests in SaaS & Enterprise, Artificial Intelligence and Marketing & AdTech, typically at Early Stage Venture, Seed and Series A. Match your sector and stage, then reach out with a personalized pitch.
What stage does Brian Halligan invest at?
Brian Halligan typically invests at Early Stage Venture, Seed and Series A. Lead with traction that fits the stage when you reach out.
What is Brian Halligan's typical check size?
Brian Halligan typically writes checks around $500K. 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.