Jonathan Siegel is an angel investor based in San Francisco, California, United States with 10 known investments: Intercom, Arcjet, Pingboard, Autify, Audiam, PilotGo, SignTime, Coast Technologies, Cloudkick and Sixty AI.
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Investment focus
- Stage
- Seed
Contacts
Jonathan Siegel portfolio companies (10)
- Intercom
- Arcjet
- Pingboard
- Autify
- Audiam
- PilotGo
- SignTime
- Coast Technologies
- Cloudkick
- Sixty AI
Affiliated funds' portfolios
Chairman at Xenon Partners, whose known portfolio counts 3 companies
- FollowUp
- Packagecloud
- TangoTrade
Investor Profile
Founders in the listed sectors AI, Education and SaaS, and focus areas Data Analytics, EdTech, Enterprise SaaS and Higher Ed will recognize the pattern in this portfolio.
Jonathan Siegel appears in Seed rounds across the known deals.
Reviewing the investment history helps decide whether there is a realistic fit before reaching out.
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Frequently asked questions
Who is Jonathan Siegel?
Jonathan Siegel is an angel investor based in San Francisco, California, United States with 10 known investments on file, among them Intercom, Arcjet and Pingboard. The sections above list the sectors, stages and firms attached to that record.
What does Jonathan Siegel invest in?
Listed sectors include AI, Education and SaaS; listed focus areas include Data Analytics, EdTech, Enterprise SaaS and Higher Ed. 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 Jonathan Siegel invest at?
The known deals of Jonathan Siegel 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 Jonathan Siegel listed at?
Jonathan Siegel is listed as Chairman at Xenon Partners, whose known portfolio counts 3 companies.
How do I contact Jonathan Siegel?
An email address and a LinkedIn page are on file for Jonathan Siegel. 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