Heidi Roizen works as a Partner at Threshold Ventures. The firm's known portfolio counts 11 companies.
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Investment focus
Contacts
Affiliated funds' portfolios
Partner at Threshold Ventures, whose known portfolio counts 11 companies
- Salvo Health
- Bluefish
- Inertia
- Veritus
- Adaption Labs
- Freeform
- Benepass
- Sequen
- Nervana
- Ritten
- Topos Bio
Investor Profile
Heidi Roizen is listed against sectors AI, FinTech, Hardware and Healthcare, and focus areas Analytics, Cloud Infrastructure, Data and Developer Tools in the database.
Threshold Ventures appears in Seed, Series A and Series B rounds across its known deals.
What the affiliated firm has backed is the closest available signal on whether Heidi Roizen is worth approaching.
Colleagues at Threshold Ventures
Emily Melton
Founder and Managing Partner
Portola Valley, United States
Andreas Stavropoulos
Partner
Atherton, United States
Lisa Xu
Partner
San Francisco, United States
Josh Stein
Managing Partner
Menlo Park, United States
Bill Bryant
General Partner
Seattle, United States
Katie Evans
Venture Investor
San Francisco, United States
Melissa Shang
Investor
San Francisco, United States
Arpit Mittal
Partner
San Francisco, United States
Megan Kelly
Partner
New York, United States
Frequently asked questions
Who is Heidi Roizen?
Heidi Roizen is a venture capital investor based in San Francisco, California, United States, listed as Partner at Threshold Ventures. The known portfolio of that firm counts 11 companies. That portfolio belongs to the firm, not to Heidi Roizen personally.
What does Heidi Roizen invest in?
Listed sectors include AI, FinTech, Hardware and Healthcare; listed focus areas include Analytics, Cloud Infrastructure, Data and Developer Tools. Those tags come from the portfolios of the firms this profile is attached to, so they read as a record of what has been backed rather than a stated preference for what comes next.
What stage does Heidi Roizen invest at?
Threshold Ventures appears in Seed, Series A and Series B rounds across its known deals, and Heidi Roizen is listed there as Partner. 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 Heidi Roizen listed at?
Heidi Roizen is listed as Partner at Threshold Ventures. 9 other people in the database share a firm with Heidi Roizen.
How do I contact Heidi Roizen?
An email address, a phone number and a LinkedIn page are on file for Heidi Roizen. 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