Jonathan Siegel
Angel investor in San Francisco
San Francisco, California
Jonathan Siegel, Angel investor in San Francisco is an active investor based in San Francisco, California. This profile covers what Jonathan Siegel backs, at which stage, and how founders can reach out in 2026.
- Investor type
- AngelInvestor
- Stages
- Pre SeedSeed
- Invests in
- Artificial IntelligenceSaaS & EnterpriseCrypto & Web3Consumer & RetailE-commerce & D2CDeveloper Tools & DataCybersecurityMobility & Logistics
- Location
- San Francisco, California
- Typical check
- $150K
- Past investments
- 46
Notable investments
CircleCITuneCoreSocialFolders
EasyPost
TransifexBabyJunk, Inc
JavelinFtopia
CanvasHow to reach Jonathan Siegel
Angels and operators like Jonathan Siegel 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 Jonathan Siegel
Frequently Asked Questions
What does Jonathan Siegel invest in?
Jonathan Siegel invests in Artificial Intelligence, SaaS & Enterprise, Crypto & Web3 and Consumer & Retail, typically at Pre Seed and Seed. Match your sector and stage, then reach out with a personalized pitch.
What stage does Jonathan Siegel invest at?
Jonathan Siegel typically invests at Pre Seed and Seed. Lead with traction that fits the stage when you reach out.
What is Jonathan Siegel's typical check size?
Jonathan Siegel typically writes checks around $150K. Use it as a signal for whether your raise fits their stage.
How do I contact Jonathan Siegel?
Unlock Jonathan Siegel's verified email on Round Funded Accelerator and send a personalized pitch. We surface only deliverable contacts so your outreach lands.