Aileen Lee

Founder and Managing Partner, Cowboy Ventures
Aileen Lee's 2013 analysis made unicorn a data-driven lens for founders and investors; after emailing women VCs she co-founded All Raise to grow female investors and capital for women founders.
How to contact Aileen Lee
Stages their fund invests in
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Avg Check
$500K - $3M
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Does their fund Lead?
Yes
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Geos their fund invests in
USA
Aileen Lee
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Sectors their fund invests in
SaaS
Fintech
Devtools
Health
Consumer
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$500K - $3M
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Yes
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About Aileen Lee

Aileen Lee coined and rigorously defined the unicorn concept in her 2013 "Welcome to the Unicorn Club" analysis, creating a detailed data framework that turned unicorn into a quantitative lens for founders and investors rather than just a buzzword. She co-founded All Raise after writing an email to a group of women VCs, using her platform and data to drive systemic change in venture by increasing female investors and capital flow to women-founded companies.

Aileen Lee's Interests

What they've been talking about across their social media accounts
  • Targeted interest in early-stage teams applying artificial intelligence to specific, often overlooked verticals. She actively calls for founders building software for unsexy or old-school industries, such as professional services, where AI can automate manual tasks like billing, tagging, and summarizing that typically constrain pricing models.
  • Deep focus on macro market analysis and startup data trends, specifically regarding Unicorn companies. As the creator of the term, she frequently shares updates on her firm's proprietary data analysis regarding billion-dollar companies, noting shifts in capital efficiency and the pendulum swing from consumer to enterprise technologies over the last decade.
  • Advocacy for diversity and women in leadership within the tech ecosystem. She regularly promotes initiatives like All Raise that support female investors and founders, and she draws parallels between high performance in tech and women's sports, such as sharing charts about basketball player Caitlin Clark or commenting on tennis.
  • Emphasis on cybersecurity and fraud prevention solutions arising from personal experience. After dealing with a sophisticated impersonation scheme that involved the FBI, she has expressed a strong desire to see new startups tackling identity verification, anti-phishing tools, and solutions to combat financial fraud.
  • Support for vertical SaaS and software that productizes business processes. She highlights portfolio wins in this area, such as companies serving small-to-medium businesses or school transportation systems, signaling a preference for practical B2B solutions over hype-driven cycles.

About their Fund

Cowboy Ventures

Sectors
SaaS, Fintech, Devtools, Health, Consumer
Rounds
Pre-Seed - Series A
Avg Check Size
$500K - $3M

Cowboy Ventures is led by Aileen Lee, who coined the term "unicorn" and created the analytical framework that defines billion-dollar startups, giving the firm a uniquely data-driven perspective on market dynamics and category-shaping outcomes. The firm backs founders re-imagining life and work through technology, with a distinct "Mustang Fund" structure that allows them to double down on breakout companies while keeping their primary fund focused purely on seed investments.

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