Deep33 Ventures on Tuesday announced its emergence from stealth with the launch of a $150 million inaugural fund aimed at investing in deep tech companies operating along what it describes as the U.S.-Israel allied infrastructure corridor. The firm has completed a $100 million first close and plans to reach a final close of $150 million by the end of the first quarter of 2026. Deep33 said the fund is designed to address critical infrastructure bottlenecks, including energy, computing capacity and industrial autonomy, that it believes are constraining the global AI investment cycle, now estimated at $1 trillion.
The fund is led by Lior Prosor, an entrepreneur and investor with experience in technology, energy and defense investments, and Michael Broukhim, a West Coast-based serial entrepreneur and angel investor. Prosor has invested in companies including Via Transportation, Digital Ocean, Lemonade Insurance, UVeye and Carbyne. Broukhim’s investment portfolio includes SpaceX, Stripe, Hut8 and Groq. “Deep33 was built because the AI supercycle cannot reach its potential without a radical reimagining of our physical foundations,” Prosor said. “We are not investing in software layers. We are backing the hard systems, energy, quantum and robotics, that sustain a modern sovereign state.”
Broukhim said the firm focuses on what he called an underserved intersection between Israeli engineering talent and U.S. national resilience. “Our platform is designed to help founders cross the hardest chasm, moving from breakthrough invention to large-scale industrial and governmental adoption,” he said. Joining Deep33 as chairman is Lior Susan, founder of Eclipse Ventures and a veteran Silicon Valley investor in industrial and deep tech. The firm said Susan’s appointment underscores its ambition to build large-scale infrastructure companies with global impact.
“Deep33 was built because the AI supercycle cannot reach its potential without a radical reimagining of our physical foundations. We are backing the hard systems, energy, quantum and robotics, that sustain a modern sovereign state,” said Lior Prosor.
Deep33 operates under what it calls an expert-first model, with vertical leads drawn from senior ranks of Israel’s technical and security ecosystem. The quantum vertical is led by Col. (Res.) Joab Rosenberg, a former senior official in IDF Intelligence, a former commander of the Talpiot program and a quantum physicist trained at the Weizmann Institute. The energy vertical is led by Ori Amsalem, a former investor at Arkin Capital and Ernst & Young with experience in deep tech and energy transactions in Israel and abroad. AI infrastructure investments are led by Maj. (Res.) Yael Barsheshet, who spent a decade in technical leadership roles in IDF Intelligence, held product leadership positions at an AI startup and has led early-stage AI infrastructure and cybersecurity investments. Government relations and grants are overseen by venture partner Yarden Golan, who until recently served as chief of staff to Ron Dermer during his tenure as Israel’s minister of strategic affairs and as Israeli ambassador to the United States. Autonomous robotics advisory is provided by Elram Goren, a former IDF Intelligence officer and co-founder and former CEO of Fabric, an autonomous robotics company that raised more than $300 million.
“Every time a new computing layer was added, vast markets were born,” Rosenberg said. “Quantum computing is the next layer, and its impact will cross almost every significant industry, including energy, AI infrastructure and other national infrastructures.”
Deep33 said it has already completed five initial investments aligned with its focus on critical U.S. and Israeli infrastructure. These include Quamcore, which is developing a superconducting quantum computing architecture designed to support million-qubit systems; CyberRidge, a post-quantum defense company building an encryption platform that converts sensitive data into what it describes as unprocessable optical noise; and Particle, which is developing a compact, desktop-sized high-energy particle accelerator. The portfolio also includes two companies currently operating in stealth mode, one in energy that is developing technology to produce fuels and chemicals without oil, living cells or toxic waste, and one in AI infrastructure focused on improving computing efficiency, GPU utilization and operational costs.
The firm said its ability to guide portfolio companies through government engagement, grant funding and connections with U.S. investors gives it a competitive advantage, particularly during what it called a period of peak investment in critical infrastructure.
Deep33 has offices in Tel Aviv, New York and Los Angeles. Its investors include family offices, institutional investors, general partners from established venture capital firms, deep tech founders and partners from funds in Israel and the United States.