Jack Zhang, Venture Partner at Contrary is an active investor based in San Francisco, United States. This profile covers what Jack Zhang backs, at which stage, and how founders can reach out in 2026.
Jack Zhang is a Venture Partner at Contrary, focusing on ML/Systems and connecting with Princeton-based founders.
Jack Zhang invests in SaaS & Enterprise, Developer Tools & Data and Artificial Intelligence, typically at Seed and Series A.
- Investor type
- VC
- Stages
- SeedSeries A
- Invests in
- SaaS & EnterpriseDeveloper Tools & DataArtificial Intelligence
- Location
- San Francisco, United States
- Typical check
- $625K
How to reach Jack Zhang
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About this profile
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Cite this page
Round Funded. "Jack Zhang." Round Funded investor database, updated November 3, 2026.
Stable URL, it will not change: https://www.roundfunded.com/en/investor/jack-zhang
Frequently Asked Questions
Who is Jack Zhang?
Jack Zhang, Venture Partner at Contrary is an active investor based in San Francisco, United States. Jack Zhang invests in SaaS & Enterprise, Developer Tools & Data and Artificial Intelligence, typically at Seed and Series A.
What does Jack Zhang invest in?
Jack Zhang invests in SaaS & Enterprise, Developer Tools & Data and Artificial Intelligence, typically at Seed and Series A. Match your sector and stage, then reach out with a personalized pitch.
What stage does Jack Zhang invest at?
Jack Zhang typically invests at Seed and Series A. Lead with traction that fits the stage when you reach out.
What is Jack Zhang's typical check size?
Jack Zhang typically writes checks around $625K. Use it as a signal for whether your raise fits their stage.
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.