Yevgeny Dibrov
Co-Founder & CEO at armis
Reviewed Updated Mar 22, 2026This profile is AI-generated. If you spot an error, please help us fix it by sharing a URL to the correct information.
Co-founder & CEO of Armis ($9.1B valuation), Israeli cybersecurity company. Ukrainian-born, immigrated Israel age 3-4. Technion BS electrical engineering + computer science. Israeli Unit 81 intelligence corps (2007-2010). VP Business Development at Adallom (age 25) → Microsoft acquisition ($320M, 2015). Angel investor ($5K-$50K) in cybersecurity, enterprise infrastructure, AI, developer tools. Recent investment in Spirit. Palo Alto based.
Background
Yevgeny Dibrov was born in Ukraine and immigrated to Israel at age three or four, growing up in the Sha’arayim neighborhood of Rehovot 12. He was raised by his mother and maternal grandparents, without a father present 2. He earned a B.Sc. in electrical engineering and computer science from the Technion — Israel Institute of Technology 13.
Dibrov served in Israel’s elite Unit 81 intelligence corps from 2007 to 2010 4. After military service, he was recruited by Assaf Rappaport as one of the first employees at Adallom, a cloud security startup, where he became VP of Business Development by age 25 1. Adallom was acquired by Microsoft for $320 million in July 2015 35.
One month after the Adallom exit, Dibrov co-founded Armis with Nadir Izrael, a fellow Technion graduate and military colleague 5. Armis developed cyber exposure management and security software for enterprise IoT and OT environments. In January 2020, Insight Partners acquired a majority stake in Armis at a valuation exceeding $1 billion 45. Under Dibrov’s leadership, Armis continued to scale rapidly, reaching $340 million in annual recurring revenue with over 50% year-over-year growth 6. In October 2024, Armis raised a $200 million Series D at a $4.2 billion valuation 7, followed by a $435 million pre-IPO round in November 2025 at a $6.1 billion valuation 6.
In December 2025, ServiceNow announced its acquisition of Armis for $7.75 billion in cash — the fourth-largest exit in Israeli tech history 89. Dibrov will serve as general manager of the Armis business unit within ServiceNow 9.
Alongside his operating role at Armis, Dibrov is an active angel investor with a small portfolio of approximately 10 investments, primarily in Israeli cybersecurity and enterprise infrastructure startups 1011.
Stated Thesis
Dibrov has not articulated a formal angel investing thesis. His investing appears to be driven by personal relationships with founders, particularly those from the Israeli military intelligence community (Unit 81 and Unit 8200) and the broader Israeli cybersecurity ecosystem 4.
In a CTech interview, Dibrov shared an investing insight from Michael Moritz of Sequoia Capital: “He prefers to invest in an entrepreneur with an immigration background and not in someone who was born to wealth, as immigrants will work harder and strive to prove themselves more” 2. This suggests Dibrov values grit and drive in the founders he backs.
On his own entrepreneurial philosophy, Dibrov has said: “Most people would come up with a cool technology, then figure out how to sell it. Instead, we looked for the biggest pain points and started there” 5 — indicating a preference for customer-centric, problem-first approaches.
Inferred Thesis
Based on 10 verified angel investments. Dibrov invests small checks ($5K–$50K, with a typical check around $25K) 10 and often co-invests with his Armis co-founder Nadir Izrael.
Sector distribution (10 verified investments): - Cybersecurity: 7 of 10 (70%) — Talon Cyber Security, Atmosec, Axiom Security, Wiz, Otterize, Spirit, Daylight - AI / MLOps: 1 of 10 (10%) — Aporia - Cloud infrastructure / observability: 1 of 10 (10%) — Epsagon - Sales tech: 1 of 10 (10%) — Winn.ai
Stage distribution (10 verified investments): - Seed: 10 of 10 (100%) — all verified investments are at seed stage
Geographic focus: - Israel-based startups: 10 of 10 (100%)
Founder profile patterns: - Israeli military intelligence veterans (Unit 81, Unit 8200, Talpiot): the vast majority of portfolio companies were founded by alumni of elite military units - Repeat founders and operators with prior cybersecurity exits
Co-investor patterns: - Nadir Izrael (Armis CTO) co-invests in nearly every deal - Frequently appears alongside Assaf Rappaport (Wiz), Michael Shaulov (Fireblocks), and Ofer Ben-Noon (Talon) - Institutional co-investors include Cyberstarts, Sequoia Capital, Index Ventures, and Lightspeed Venture Partners
Notable patterns not in stated thesis: - Dibrov’s portfolio is almost exclusively cybersecurity, far more concentrated than a typical angel investor - All investments are in companies founded by people within his direct professional network - The portfolio functions as a tight-knit reciprocal angel network among Israeli cybersecurity founder-operators — Dibrov invested in Rappaport’s Wiz, and Rappaport invested alongside Dibrov in Spirit and Atmosec
Exit outcomes: - 5 of 10 portfolio companies have exited: Talon Cyber Security (acquired by Palo Alto Networks for ~$625M, 2023) 12, Atmosec (acquired 2023) 13, Epsagon (acquired by Cisco for ~$500M, 2021) 14, Axiom Security (acquired by Okta for ~$100M, 2025) 15, Wiz (acquired by Google for $32B, announced 2025) 16
Portfolio
| Company | Stage | Year | Sector | Source |
|---|---|---|---|---|
| Aporia | Seed | 2021 | AI / MLOps | 17 |
| Atmosec | Seed | 2021 | Cybersecurity (SaaS security) | 13 |
| Talon Cyber Security | Seed | ~2021 | Cybersecurity (enterprise browser) | 12 |
| Axiom Security | Seed | 2022 | Cybersecurity (IAM) | 15 |
| Winn.ai | Seed | 2022 | Sales tech | 18 |
| Epsagon | Seed | ~2018 | Cloud observability | 4 |
| Wiz | Early | ~2020 | Cloud security | 16 |
| Otterize | Seed | 2023 | Cybersecurity (access control) | 19 |
| Spirit | Seed | 2026 | Cybersecurity (AI threat detection) | 20 |
| Daylight | Seed | 2025 | Cybersecurity (MDR) | 21 |
This table represents approximately 10 verified investments. Tracxn and CB Insights report a portfolio of 6 companies 10; the discrepancy is likely because some aggregators do not capture all angel investments, particularly those in very early or undisclosed rounds.
In Their Own Words
“I take losses hard. Competition is a matter of life and death for me. Even today when there is a competition, I see it as a matter of life and death.” — Yevgeny Dibrov, CTech interview, 2024 2
“The good part is that I always do whatever it takes to succeed. In 2019 I flew half a million miles on United alone.” — Yevgeny Dibrov, CTech interview, 2024 2
“My feeling is that no matter how hard I work — if I rest for a moment, someone will overtake me.” — Yevgeny Dibrov, CTech interview, 2024 2
“The CEO should be the best salesperson in the company.” — Yevgeny Dibrov, CTech interview, 2024 2
“Most people would come up with a cool technology, then figure out how to sell it. Instead, we looked for the biggest pain points and started there.” — Yevgeny Dibrov, Insight Partners interview 5
“We came from the Soviet Union with nothing… For me, it’s all about working extremely hard, staying humble, staying hungry, doing more and achieving more, and building huge companies that create opportunities.” — Yevgeny Dibrov, Ynet interview, 2025 9
“Remember that this relationship is more binding than marriage. You can’t divorce your investors.” — Yevgeny Dibrov, Insight Partners interview 5
“We met 11 firms in one day and had eight offers on the table by the evening.” — Yevgeny Dibrov, describing Armis Series C fundraising, Insight Partners interview 5
“Nadir and I are like a married couple… The key between us has always been to act quickly, even with critical things, no more than ten minutes will pass until a decision is made.” — Yevgeny Dibrov, CTech interview, 2024 2
What Founders Say
No independently sourced founder testimonials found. Dibrov’s angel investing is a side activity alongside his full-time CEO role at Armis, and his portfolio founders have not publicly commented on his role as an investor in press or social media that could be independently verified.
Sources
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CTech, “From Russia, With Coding Skills,” accessed March 2026. https://www.calcalistech.com/ctech/articles/0,7340,L-3769789,00.html↩↩↩
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CTech, “I take losses hard. Competition is a matter of life and death for me,” accessed March 2026. https://www.calcalistech.com/ctechnews/article/c9k42siqu↩↩↩↩↩↩↩↩
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Clay, “Who is the CEO of Armis? Yevgeny Dibrov’s Bio,” accessed March 2026. https://www.clay.com/dossier/armis-ceo↩↩
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CTech, “Unit 81: The elite military unit that caused a big bang in the Israeli tech scene,” accessed March 2026. https://www.calcalistech.com/ctech/articles/0,7340,L-3886512,00.html↩↩↩↩
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Insight Partners, “How cofounders Yevgeny Dibrov and Nadir Izrael built Armis,” accessed March 2026. https://www.insightpartners.com/ideas/how-cofounders-yevgeny-dibrov-and-nadir-izrael-built-armis-cyber-exposure-management-and-security-giant/↩↩↩↩↩↩↩
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Armis press release, “Cybersecurity Leader Armis Closes $435 Million Round at $6.1 Billion Valuation,” November 2025, accessed March 2026. https://www.armis.com/newsroom/press/cybersecurity-leader-armis-closes-435-million-round-at-6-1-billion-valuation/↩↩
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Armis press release, “Armis Raises $200M at $4.2B Valuation as Growth Soars, Eyes IPO,” October 2024, accessed March 2026. https://www.armis.com/newsroom/press/armis-raises-200m-at-4-2b-valuation-as-growth-soars-eyes-ipo/↩
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TechCrunch, “ServiceNow to acquire cybersecurity startup Armis for $7.75B,” December 2025, accessed March 2026. https://techcrunch.com/2025/12/23/servicenow-to-acquire-cybersecurity-startup-armis-for-7-75b/↩
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Ynet, “‘We’ll make billions much faster’: Armis founder in special interview after huge exit,” accessed March 2026. https://www.ynetnews.com/business/article/sywinwa7zg↩↩↩
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Signal by NFX, “Yevgeny Dibrov’s Investing Profile,” accessed March 2026. https://signal.nfx.com/investors/yevgeny-dibrov↩↩↩
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Tracxn, “Yevgeny Dibrov - 2025 Portfolio & Founded Companies,” accessed March 2026. https://tracxn.com/d/people/yevgeny-dibrov/__X7sIYRSnNAJh81jKL8wEW4ddELFAwnCfnpAu9H4k_pI↩
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TechCrunch, “Confirmed: Palo Alto has acquired Talon Cyber Security, sources say for $625M,” November 2023, accessed March 2026. https://techcrunch.com/2023/11/06/confirmed-palo-alto-has-acquired-talon-cyber-security-sources-say-for-625m/↩↩
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SiliconANGLE, “SaaS app security startup Atmosec exits stealth with $6M seed funding round,” December 2021, accessed March 2026. https://siliconangle.com/2021/12/15/saas-app-security-startup-atmosec-exits-stealth-6m-seed-funding-round/↩↩
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Global Venturing, “Cisco snags Epsagon in $500m deal,” accessed March 2026. https://globalventuring.com/corporate/cisco-snags-epsagon-in-500m-deal/↩
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CTech, “Okta acquires Israeli cyber startup Axiom in $100 million deal,” August 2025, accessed March 2026. https://www.calcalistech.com/ctechnews/article/ryzs3xstgl↩↩
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Ynet, “Meet the Israeli cyber investors cashing in on Google’s $32B Wiz deal,” accessed March 2026. https://www.ynetnews.com/business/article/hy7athunke↩↩
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Tech.eu, “Tel Aviv-based Aporia leaves stealth, raises $5 million, because ‘AI needs guardrails,’” April 2021, accessed March 2026. https://tech.eu/2021/04/06/tel-aviv-based-aporia-leaves-stealth-raises-5-million-because-ai-needs-guardrails/↩
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Tracxn, “Winn.AI - 2025 Funding Rounds & List of Investors,” accessed March 2026. https://tracxn.com/d/companies/winn.ai/__17J7fJ85IhF4hkReNLGKQiSXQ7l9j0Kq9B1Kg732OTg/funding-and-investors↩
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PRWeb, “Otterize Emerges Out of Stealth With $11.5M in Seed Funding,” April 2023, accessed March 2026. https://www.prweb.com/releases/otterize-emerges-out-of-stealth-with-11-5m-in-seed-funding-and-a-first-of-its-kind-offering-for-developers-automating-secure-service-to-service-access-825023664.html↩
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CTech, “Just three months after launch, cyber startup Spirit valued at $400 million in $50 million raise,” January 2026, accessed March 2026. https://www.calcalistech.com/ctechnews/article/b1gts4qnzg↩
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Yahoo Finance, “Daylight Secures $40 Million to Redefine Managed Security Services in the Agentic AI Era,” November 2025, accessed March 2026. https://finance.yahoo.com/news/daylight-secures-40-million-redefine-140000681.html↩