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 & EnterpriseClimate & EnergyIoT & Connected DevicesMobility & LogisticsSupply Chain & LogisticsEdTechFoodTech & AgricultureAgTech & Agriculture
- 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 Accelerator.
Connect with Brian Halligan
Frequently Asked Questions
What does Brian Halligan invest in?
Brian Halligan invests in SaaS & Enterprise, Climate & Energy, IoT & Connected Devices and Mobility & Logistics, 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 I contact Brian Halligan?
Unlock Brian Halligan's verified email on Round Funded Accelerator and send a personalized pitch. We surface only deliverable contacts so your outreach lands.