James Ruben
Angel investor in San Francisco
San Francisco, California
James Ruben, Angel investor in San Francisco is an active investor based in San Francisco, California. This profile covers what James Ruben backs, at which stage, and how founders can reach out in 2026.
- Investor type
- AngelFounderInvestor
- Stages
- Pre SeedSeed
- Invests in
- Marketplace
- Location
- San Francisco, California
- Typical check
- $150K
- Past investments
- 2
Notable investments
Millions
Self-employedHow to reach James Ruben
Angels and operators like James Ruben 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 James Ruben
Frequently Asked Questions
What does James Ruben invest in?
James Ruben invests in Marketplace, typically at Pre Seed and Seed. Match your sector and stage, then reach out with a personalized pitch.
What stage does James Ruben invest at?
James Ruben typically invests at Pre Seed and Seed. Lead with traction that fits the stage when you reach out.
What is James Ruben's typical check size?
James Ruben typically writes checks around $150K. Use it as a signal for whether your raise fits their stage.
How do I contact James Ruben?
Unlock James Ruben's verified email on Round Funded Accelerator and send a personalized pitch. We surface only deliverable contacts so your outreach lands.