Heidi Roizen, Partner at Threshold Ventures is an active investor based in San Francisco, United States. This profile covers what Heidi Roizen backs, at which stage, and how founders can reach out in 2026.
Heidi Roizen is a venture capitalist and corporate director, and a partner at Threshold Ventures.
Heidi Roizen invests in Artificial Intelligence, typically at Seed and Series A.
- Location
- San Francisco, United States
- Typical check
- $625K
What does Heidi Roizen invest in?
- Investor type
- VC
- Invests in
- Artificial Intelligence
Where is Heidi Roizen based?
Heidi Roizen is based in San Francisco, United States.
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- Startup investors in San FranciscoStartup investors in the United States
How to reach Heidi Roizen
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Cite this page
Round Funded. "Heidi Roizen." Round Funded investor database, updated September 22, 2026.
Stable URL, it will not change: https://www.roundfunded.com/en/investor/heidi-roizen-san-francisco
Frequently Asked Questions
Who is Heidi Roizen?
Heidi Roizen, Partner at Threshold Ventures is an active investor based in San Francisco, United States. Heidi Roizen invests in Artificial Intelligence, typically at Seed and Series A.
What does Heidi Roizen invest in?
Heidi Roizen invests in Artificial Intelligence, typically at Seed and Series A. Match your sector and stage, then reach out with a personalized pitch.
What stage does Heidi Roizen invest at?
Heidi Roizen typically invests at Seed and Series A. Lead with traction that fits the stage when you reach out.
What is Heidi Roizen's typical check size?
Heidi Roizen typically writes checks around $625K. Use it as a signal for whether your raise fits their stage.
Where is Heidi Roizen based?
Heidi Roizen is based in San Francisco, United States.
How do founders reach investors like this?
Round Funded lists active investors with verified, professional contact details for signed-up founders. Filter by sector, stage and location, then send a personalized pitch from your own inbox.
What is Round Funded?
Round Funded is an investor database and outreach platform for startup founders. It lists 60,000+ active investors with verified contacts, filtered to recent investment activity, and lets founders send personalized pitches from their own Gmail, track replies, and share a free Data Room. Round+ starts at $99 per month with a 3-day trial.
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