Thomas M. Siebel is an angel investor based in Redwood City, California, United States. The known portfolio is one company, C3 AI.
Is Thomas M. Siebel a fit for your startup?
Paste your website. AI checks the fit and scores every other investor too.
Investment focus
- Stage
- Seed
- Sector
- AIEnergyHealthcareSaaS
Contacts
Thomas M. Siebel portfolio company (1)
- C3 AI
Investor Profile
Founders in the listed sectors AI, Energy, Healthcare and SaaS, and focus areas Big Data, Cloud Infrastructure, Data Analytics and Enterprise SaaS will recognize the pattern in this portfolio.
Thomas M. Siebel is listed for Seed rounds in the database.
The portfolio and focus above give founders context on whether Thomas M. Siebel matches their raise.
Similar investors
Showing 20 of 99
Vivek Agarwal
angel investor
Austin, United States
Viviana Faga
Investor and Board Member
San Francisco, United States
Ashish Mahashabde
angel investor and operator angel
San Francisco, United States
John Vincent
General Partner
Atlanta, United States
Bill Veghte
angel investor and operator angel
Palo Alto, United States
Gian Fulgoni
Venture Partner
North Miami Beach, United States
Icaro Vazquez
angel investor
Palo Alto, United States
James Higa
Founder. Managing Partner
San Jose, United States
G Craig Vachon
Investor/Advisor
Carmel, United States
Gurvendra Suri
angel investor and operator angel
Irving, United States
Purvi Gandhi
angel investor
San Francisco, United States
Mike Greenfield
angel investor and operator angel
Palo Alto, United States
Vamsi Sistla
angel investor and operator angel
Sammamish, United States
Jay Vijayan
angel investor and operator angel
San Francisco, United States
Joyo Wijaya
Partner
Menlo Park, United States
Vivek Joshi
angel investor and operator angel
Palo Alto, United States
Jose Vargas
Co-Founder, Board Member
Miami, United States
Greg Back
angel investor
San Francisco, United States
Philip Rosedale
angel investor and operator angel
San Francisco, United States
Viral Bajaria
angel investor and operator angel
San Francisco, United States
Frequently asked questions
Who is Thomas M. Siebel?
Thomas M. Siebel is an angel investor based in Redwood City, California, United States with one known investment on file, C3 AI. The sections above list the sectors and stages attached to that record.
What does Thomas M. Siebel invest in?
Listed sectors include AI, Energy, Healthcare and SaaS; listed focus areas include Big Data, Cloud Infrastructure, Data Analytics and Enterprise SaaS. 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 Thomas M. Siebel invest at?
The database lists Thomas M. Siebel for 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.
How do I contact Thomas M. Siebel?
An email address, a phone number and a LinkedIn page are on file for Thomas M. Siebel. The address stays masked on this page and is readable inside RaiseHunt after you create an account.
Skip the browsing. Let AI find your ideal investors in one minute.
Paste your startup website and AI picks your best-fit investors out of 135,000+ profiles.
Data: RaiseHunt investor dataset · Snapshot 6 September 2026 · How this data is built · Report a correction or request removal