Alex Rosen
Angel investor in San Francisco
San Francisco, California
Alex Rosen, Angel investor in San Francisco is an active investor based in San Francisco, California. This profile covers what Alex Rosen backs, at which stage, and how founders can reach out in 2026.
- Investor type
- AngelVCInvestor
- Stages
- Series A
- Invests in
- Artificial IntelligenceFintechHealthcare & BiotechBiotech & PharmaSaaS & EnterpriseConsumer & RetailDeveloper Tools & DataIoT & Connected Devices
- Location
- San Francisco, California
- Typical check
- $1M
- Past investments
- 15
Notable investments
Braze
Electric ObjectsFunzio
SafeGraph
Leanplum
Fastly
FLIPDoctorC
Uplift
TrifactaGREE
OutlierHow to reach Alex Rosen
Angels and operators like Alex Rosen 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 Alex Rosen
Frequently Asked Questions
What does Alex Rosen invest in?
Alex Rosen invests in Artificial Intelligence, Fintech, Healthcare & Biotech and Biotech & Pharma, typically at Series A. Match your sector and stage, then reach out with a personalized pitch.
What stage does Alex Rosen invest at?
Alex Rosen typically invests at Series A. Lead with traction that fits the stage when you reach out.
What is Alex Rosen's typical check size?
Alex Rosen typically writes checks around $1M. Use it as a signal for whether your raise fits their stage.
How do I contact Alex Rosen?
Unlock Alex Rosen's verified email on Round Funded Accelerator and send a personalized pitch. We surface only deliverable contacts so your outreach lands.