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John Blumenthal

Verified: Sep 2026 (Profile Confirmed)🌱 Pre-Seed Pioneer
San Francisco, CA
𝕏in
Check Size Range

Flexible Check Size

Preferred Stages
pre-seedseed

Background & Investment Thesis

Partner at Columbia University in the City of New York. Active early-stage technology angel investor and VC.

Focus Industries

aisaas
AI Outreach Insight94% Match Score

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

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Verified Deal Signals Active

Key Deal Terms & Quick Facts

Audited venture due diligence summary for John Blumenthal

Verified Deal Signals
Typical Check Size

Undisclosed ($25k – $250k typical for early angels)

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

Verified (Protected — Unlock)

Direct mailbox protected against spam
Focus Industries & Categories
aisaas

Frequently Asked Questions about John Blumenthal

What is John Blumenthal's typical angel check size?▼

John Blumenthal's investment check size typically ranges around Undisclosed ($25k – $250k typical for early angels), participating in early-stage financing rounds alongside leading venture capital funds and angel syndicates.

What stages and sectors does John Blumenthal invest in?▼

John Blumenthal primarily backs early-stage startups across pre-seed, seed stages, focusing on ai, saas.

What companies are in John Blumenthal's angel portfolio?▼

John Blumenthal actively participates in early-stage technology investments and venture syndicates.

How can startup founders contact or pitch John Blumenthal?▼

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