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Zach Weinberg

Verified: Jun 2026 (SMTP Validated)👑 Lead Investor
New York, NY
in
Check Size Range

Flexible Check Size

Preferred Stages
seedseries-a

Background & Investment Thesis

Co-founder of Flatiron Health (acquired by Roche for $1.9B). Angel in health AI.

Focus Industries

healthaisaasbiotech

Notable Portfolio & Backed Deals

AI Outreach Insight94% Match Score

Active investor in health, ai, saas, biotech. Highly responsive to concise pitches with clear traction metrics.

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Key Deal Terms & Quick Facts

Audited venture due diligence summary for Zach Weinberg

Verified Deal Signals
Typical Check Size

$100k – $3M

Direct angel check per syndicate / round
Target Stages
seedseries-a
Early-stage entry valuation priority
Founder Pitch Contact

Verified (Protected — Unlock)

Direct mailbox protected against spam
Focus Industries & Categories
healthaisaasbiotech
Notable Backed Deals & StartupsInternal company dossiers
Flatiron Health

Frequently Asked Questions about Zach Weinberg

What is Zach Weinberg's typical angel check size?▼

Zach Weinberg's investment check size typically ranges around $100k – $3M, participating in early-stage financing rounds alongside leading venture capital funds and angel syndicates.

What stages and sectors does Zach Weinberg invest in?▼

Zach Weinberg primarily backs early-stage startups across seed, series-a stages, focusing on health, ai, saas, biotech.

What companies are in Zach Weinberg's angel portfolio?▼

Zach Weinberg has backed notable companies including Flatiron Health.

How can startup founders contact or pitch Zach Weinberg?▼

Founders can access verified direct email contact channels, AI-assisted pitch drafting, and syndicate warm intro paths for Zach Weinberg through OpenAngels.