Investor profile
Justin Siegel
Angel, Operator angel & Co-owner at NRG Energy, Founding Venture Partner at NextGen Venture Partners
An angel investor and operator angel based in Austin, Texas, United States, Justin Siegel has 6 known investments: Mustard, PenPal Schools, Media Armor, Aquifer Motion, Kronologic and Kinvey.
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Investment focus
- Stage
- Seed
Contacts
Justin Siegel portfolio companies (6)
- Mustard
- PenPal Schools
- Media Armor
- Aquifer Motion
- Kronologic
- Kinvey
Affiliated funds' portfolios
Co-owner at NRG Energy, whose known portfolio counts 7 companies
- EcoFactor
- Cool Planet
- EOS
- EnTouch Controls
- Equilibrium Energy
- Ingenu
- Attack Poverty
Founding Venture Partner at NextGen Venture Partners, whose known portfolio counts 9 companies
- Fourier Health
- RunSafe Security
- Ensis
- Genesis Computing
- Receive
- Abett
- MirrorTab
- Statt
- Sandbox Wealth
Investor Profile
Founders in the listed sectors AI, Consumer, Education and SaaS, and focus areas EdTech, Enterprise SaaS, Media & Entertainment and Sports will recognize the pattern in this portfolio.
Stage-wise, the known deals cluster around Seed rounds.
The portfolio and focus above give founders context on whether Justin Siegel matches their raise.
Colleagues
Showing 20 of 92
Maxwell Wessel
Venture Partner
San Francisco, United States
Jeffrey Glass
Co-Owner/ Co-founder
United States
Conor Sibley
Venture Partner
Arlington, United States
Rick E. Wittenbraker
Member
Austin, United States
Justin Saye
Venture Partner
Los Angeles, United States
Joshua Bogart
Member
Arlington, United States
Chris May
Venture Partner
Lexington, United States
Eric Koester
Venture Partner
Washington, United States
Craig Kaplan
Venture Partner
Los Angeles, United States
Jamey Jeff
Investor
Washington, United States
Michael W. Wellman
Venture Partner
Herndon, United States
Georgia Weidman
Venture Partner
Tutwiler, United States
Chris Keller
Managing Partner
Boston, United States
David Sandrowitz
Venture Partner
Vienna, United States
Deepen Parikh
NYC Founding Member / Venture Partner
New York, United States
Vaughn Blake
Venture Partner
Los Angeles, United States
Lolita Taub
Venture Partner
San Diego, United States
Callum Booker
Venture Partner
Austin, United States
Gautam Thakar
Venture Partner
Mumbai, India
Mclane Murphy
Associate
Houston, United States
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Frequently asked questions
Who is Justin Siegel?
Justin Siegel is an angel investor and operator angel based in Austin, Texas, United States with 6 known investments on file, among them Mustard, PenPal Schools and Media Armor. The sections above list the sectors, stages and firms attached to that record.
What does Justin Siegel invest in?
Listed sectors include AI, Consumer, Education and SaaS; listed focus areas include EdTech, Enterprise SaaS, Media & Entertainment and Sports. 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 Justin Siegel invest at?
The known deals of Justin 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 Justin Siegel listed at?
Justin Siegel is listed as Founding Venture Partner at NextGen Venture Partners. 92 other people in the database share a firm with Justin Siegel.
How do I contact Justin Siegel?
An email address, a phone number and a LinkedIn page are on file for Justin Siegel. 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