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Guy Horowitz

Guy Horowitz

Venture Capital Partner, Investor, and Product Leader

San Francisco Bay Area, California
calcalistech
Tel Aviv, Israel
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Joined September 2025
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Summary

Guy Horowitz is a seasoned Venture Capital Partner with over two decades of experience, deeply entrenched in the VC ecosystem. He currently holds leadership positions as a Venture Partner at 33N Ventures and Managing Partner at ESH.vc, focusing on early to later-stage investments in cybersecurity, infrastructure software, AI, and enterprise applications. His career is marked by a blend of product leadership and strategic investing, with a consistent focus on identifying and nurturing innovative technologies. evalyze+3
Horowitz possesses a unique ability to bridge the gap between Israeli innovation and global markets, particularly in Europe. During his tenure at DTCP, he played a crucial role in helping portfolio companies expand into European markets, leveraging the firm's strategic network and insights. He previously founded and led Deutsche Telekom's Israeli office, demonstrating a long-standing commitment to fostering international tech collaborations. dld-conference+2
Beyond his investment career, Guy Horowitz maintains a vibrant personal life, including performing in an Israeli rock cover band in Silicon Valley. He describes himself as a 'product guy' at heart, applying principles of product-market fit to both his professional investments and his creative pursuits, emphasizing the importance of passion and soul in all endeavors. calcalistech
With an educational background in Business Administration, Economics, and Industrial Engineering from Rutgers University, Haifa University, and Technion – Israel Institute of Technology, Horowitz brings a strong analytical and strategic foundation to his roles. His academic pursuits, including a special program for exceptional high-school students at Technion, highlight an early inclination towards technology and problem-solving. marketscreener

Work

Education

Writing

BlackHat: Transformation Complete

August 1, 2021

Reflections on attending the BlackHat conference in Las Vegas, sharing insights and learnings from the cybersecurity event.

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Black Hat is back. But it’s different.

August 1, 2021

An analysis of the changes and evolving landscape of the cybersecurity industry following the RSA conference.

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Takeaways from the first full COVID quarter

August 1, 2020

Insights and observations on the impact of the COVID-19 pandemic on the industry and the changes in the post-COVID reality.

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RSA 2020: Show Time!

February 1, 2020

Commentary on the RSA conference, highlighting key themes and discussions within the cybersecurity community.

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DTCP is investing in AppsFlyer (again), and it’s a big deal

January 1, 2020

Discusses DTCP's follow-on investment in AppsFlyer, explaining the strategic importance and implications of the investment.

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Hobbies

Plays in an Israeli rock cover band in Silicon Valley, finding it a vital outlet for relaxation and creative expression outside of his professional life. calcalistech

Has a lifelong passion for fields that combine art and science, such as architecture and car design, often expressing this through drawing. calcalistech