Yonatan Mandelbaum

Partner, TLV Partners
Yonatan Mandelbaum coined the Patriotism as a Service concept and champions DefenseTech—prioritizing dual-use defense technologies over generic cybersecurity—while acting as a visible AI commentator and educator mapping Israel's ML ecosystem.
How to contact Yonatan Mandelbaum
Stages their fund invests in
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Sectors their fund invests in
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Avg Check
$2-$8M
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Does their fund Lead?
Yes
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Geos their fund invests in
Israel
Yonatan Mandelbaum
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Sectors their fund invests in
AI
Cybersecurity
Fintech
Devtools
Biotech
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Avg Check
$2-$8M
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Leads?
Yes
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About Yonatan Mandelbaum

Yonatan Mandelbaum at TLV Partners coined the concept of Patriotism as a Service and actively promotes DefenseTech as a distinct investment thesis, arguing that Israel should focus on dual-use defense technology companies rather than generic cybersecurity startups to strengthen national resilience. He has become a visible commentator on AI research labs and venture-backed startups while producing technical content for engineering leaders, positioning himself as both an educator and thematic investor who maps Israel's machine learning ecosystem.

Yonatan Mandelbaum's Interests

What they've been talking about across their social media accounts
  • Focus on acquisitions as the primary exit strategy for modern startups. A major recurring theme is how venture capital currently functions within artificial intelligence and cybersecurity. The core point is that initial public offerings are becoming rare, so startups are increasingly acting as outsourced research and development arms for massive tech giants. As a specific example, a detailed comparison was made between heavily funded artificial intelligence research labs and the Israeli cyber ecosystem, noting that cyber startups get funded quickly because investors know they will inevitably be bought by industry giants rather than going public.
  • Fascination with the geopolitical power struggles surrounding artificial intelligence. There is a strong belief that large models are essentially national resources with world-altering implications. The core point is that the friction between private research labs and government entities will shape the future of global security. For instance, considerable attention was given to the tensions between Anthropic and the Pentagon over how commercial models are used for defense operations, framing this corporate-government clash as one of the most critical technology stories in the world right now.
  • Belief in Silicon Valley as the absolute center of the artificial intelligence revolution. Geographic trends for startup founders are a repeated point of observation. The main takeaway is that while places like New York gained founder traction during the pandemic, the sheer gravity of artificial intelligence development has reversed that trend. To illustrate this, it was noted that foreign entrepreneurs are overwhelmingly choosing the Bay Area again because it is the undeniable epicenter for building in the current tech climate.
  • Enthusiasm for zero-knowledge machine learning and advanced cybersecurity paradigms. Technical infrastructure and privacy are clearly top of mind when evaluating new technologies. The underlying point is that traditional confidential computing has fundamental flaws, and new cryptographic methods are needed to secure models. As an example, zero-knowledge machine learning was specifically called out as a massive emerging paradigm with infinite potential for solving vulnerability issues in modern computing environments.
  • Heavy consumption of technology podcasts for continuous learning. Audio is clearly the preferred medium for staying updated on the industry, contrasting sharply with visual summaries like market maps which were dismissed as annoying clickbait. The core point is that long-form audio discussions are highly valued for daily professional development. For example, after sharing a personal milestone of listening to over twenty-six thousand minutes of podcasts in a single year during daily commutes, an open request was made to the community for high-quality tech podcast recommendations.

About their Fund

Sectors
AI, Cybersecurity, Fintech, Devtools, Biotech
Rounds
Seed - Series A
Avg Check Size
$2-$8M

TLV Partners invests in only 12-15 startups per fund (versus the typical 20-30+) to maintain significant reserves and attention for each company, with a founder-first philosophy that avoids replacing entrepreneurs and focuses on helping founding teams grow as a whole. The firm allocates roughly 20% of partner time specifically to recruiting for portfolio companies and has co-founded programs like Enter to bring the Arab-Bedouin population in Southern Israel into core tech development roles.

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