Alexander Rosen is an angel investor and operator angel based in San Francisco, California, United States with 5 known investments: SafeGraph, UXPin, MindMeld, Flowdock and Krux.
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Investment focus
Contacts
Alexander Rosen portfolio companies (5)
- SafeGraph
- UXPin
- MindMeld
- Flowdock
- Krux
Affiliated funds' portfolios
Managing Partner at Ridge Ventures, whose known portfolio counts 10 companies
- Cerby
- Flip CX
- Recall.ai
- GoodDay Software
- Arya Health
- Ontic
- Fiveonefour
- Mailgeel
- TATO
- Theom
Investor Profile
The listing covers sectors AI and SaaS, and focus areas CRM, Cloud Infrastructure, Data Analytics and Enterprise SaaS. Startups operating in these areas may find Alexander Rosen relevant.
Alexander Rosen appears in Seed and Series A rounds across the known deals.
The portfolio and focus above give founders context on whether Alexander Rosen matches their raise.
Colleagues at Ridge Ventures
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Mary Boyajian
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Eliyahou Amsellem
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Robert Simon
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San Francisco, United States
Pat Kenealy
Venture Partner
San Francisco, United States
Akriti Dokania
Partner
San Francisco, United States
Wendy Phillips
Venture Partner
Chapel Hill, United States
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Frequently asked questions
Who is Alexander Rosen?
Alexander Rosen is an angel investor and operator angel based in San Francisco, California, United States with 5 known investments on file, among them SafeGraph, UXPin and MindMeld. The sections above list the sectors, stages and firms attached to that record.
What does Alexander Rosen invest in?
Listed sectors include AI and SaaS; listed focus areas include CRM, Cloud Infrastructure, Data Analytics and Enterprise SaaS. Those tags come from the companies attached to this profile, so they read as a record of what has been backed rather than a stated preference for what comes next.
What stage does Alexander Rosen invest at?
The known deals of Alexander Rosen include Seed and Series A rounds. Stage is the strongest single filter when you build a target list: an investor with no record at your stage rarely starts with you.
Which firm is Alexander Rosen listed at?
Alexander Rosen is listed as Managing Partner at Ridge Ventures. 8 other people in the database share a firm with Alexander Rosen.
How do I contact Alexander Rosen?
An email address, a phone number and a LinkedIn page are on file for Alexander Rosen. The address stays masked on this page and is readable inside RaiseHunt after you create an account.
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Data: RaiseHunt investor dataset · Snapshot 5 September 2026 · How this data is built · Report a correction or request removal