An angel investor based in Mountain View, California, United States, Y. Dan Rubinstein has 2 known investments: HackerRank and Revolve Robotics.
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Investment focus
- Stage
- Seed
Contacts
Y. Dan Rubinstein portfolio companies (2)
- HackerRank
- Revolve Robotics
Affiliated funds' portfolios
Investor at J-Ventures Fund, whose known portfolio counts 10 companies
- Journey Live
- Zenskar
- Nimble Way
- Onebeat
- Epic Cleantec
- Kardome
- RAAAM Memory Technologies
- Apera AI
- Develop Health
- Oso Semiconductor
Investor Profile
Founders in the listed sectors Consumer, Education, Hardware and SaaS, and focus areas Consumer Internet, EdTech, Employee Benefits and HR Tech will recognize the pattern in this portfolio.
Stage-wise, the known deals cluster around Seed rounds.
Reviewing the investment history helps decide whether there is a realistic fit before reaching out.
Colleagues at J-Ventures Fund
Guy Miasnik
Investor and Advisory Team Member
San Francisco, United States
Dan Altschuler
Member
San Francisco, United States
Adi Ruppin
Investor
Palo Alto, United States
David Wagonfeld
Co-Founder
Burlingame, United States
Lisandro Bril
Investor
Argentina
Gilad Engel
Investor
Israel
Oded Hermoni
Managing Partner
Los Altos, United States
David Meister
Venture Partner
Los Angeles, United States
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Frequently asked questions
Who is Y. Dan Rubinstein?
Y. Dan Rubinstein is an angel investor based in Mountain View, California, United States with 2 known investments on file, among them HackerRank and Revolve Robotics. The sections above list the sectors, stages and firms attached to that record.
What does Y. Dan Rubinstein invest in?
Listed sectors include Consumer, Education, Hardware and SaaS; listed focus areas include Consumer Internet, EdTech, Employee Benefits and HR Tech. 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 Y. Dan Rubinstein invest at?
The known deals of Y. Dan Rubinstein include Seed 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 Y. Dan Rubinstein listed at?
Y. Dan Rubinstein is listed as Investor at J-Ventures Fund. 8 other people in the database share a firm with Y. Dan Rubinstein.
How do I contact Y. Dan Rubinstein?
An email address and a LinkedIn page are on file for Y. Dan Rubinstein. The address stays masked on this page and is readable inside RaiseHunt after you create an account. The database holds no phone number for this profile.
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Data: RaiseHunt investor dataset · Snapshot 5 September 2026 · How this data is built · Report a correction or request removal