Yevgeny Dibrov
About Yevgeny Dibrov
Yevgeny Dibrov is co-founder and CEO of Armis, a company that helps organizations discover and secure managed, unmanaged and IoT devices. He co-founded it with Nadir Izrael in 2015.
He began his career in IT security in the Israeli Intelligence Corps' Unit 8200. Before Armis he held product management and business development roles at cloud security startup Adallom, where he was the first employee hired. Microsoft acquired Adallom in 2015. He studied computer engineering at the Technion. He received the EY Entrepreneur Of The Year 2023 Bay Area award.
Public investor databases list Dibrov as an angel with 13 to 14 recorded investments, mostly in security startups. Cybertech Israel notes early angel investments in Epsagon, later acquired by Cisco, and Trustdome, later acquired by Zscaler. He often invests in the same rounds as Nadir Izrael, Assaf Rappaport, Sharin Fisher and Cyberstarts partners. Recent rounds include Daylight Security (seed July 2025, Series A November 2025), Ocean (Series A, May 2026), Aryon Security (Series A, June 2026) and Pi Security (Series A, June 2026).
On the Lounge deals desk, Dibrov appears in two AI rounds. Attestable raised a $20M seed in August 2026, led by TLV Partners and Altimeter Capital. It uses zero-knowledge cryptography to verify the behavior of AI systems. NewCore raised a $66M seed in June 2026 from Cyberstarts, Index Ventures and Evolution Equity Partners. It builds an identity platform for humans, machines and AI agents. Dibrov is listed as an investor in both.
Signal (NFX) ranks him in Security, Developer Tools, Cloud Infrastructure, SaaS and AI, at seed and Series A, and tags him under Israel AI at seed. Signal lists an investment range of $5K to $50K with a $25K sweet spot. That figure comes from the Signal profile, not from a statement by Dibrov. He is based in the San Francisco Bay Area and Tel Aviv. We found no public statement from him about what he looks for in pitches.
- Attestable: verifies AI system behavior with zero-knowledge proofs; $20M seed, August 2026.
- NewCore: identity security for humans, machines and AI agents; $66M seed, June 2026.
- Aryon Security: cloud security with preventive enforcement; $29M Series A, June 2026.
- Pi Security: security startup; $25M Series A, June 2026.
- Ocean: security startup; $20M Series A, May 2026.
- Daylight Security: security startup; seed July 2025 and Series A November 2025.
- Spirit: cyber startup; angel in its $50M round led by Cyberstarts and Sequoia Capital.
- Epsagon: early investor; acquired by Cisco.
- Trustdome: early investor; acquired by Zscaler.
- signal.nfx.com/investors/yevgeny-dibrov
- cybertechisrael.com/node/2613
- crunchbase.com/person/yevgeny-dibrov
- armis.com/about/our-leadership
- calcalistech.com/ctechnews/article/h1ddvrd8mg
- app.dealroom.co/news/feed/israeli-startup-attestable-raises-20m-to-ver
- app.dealroom.co/companies/newcore
- buttondown.com/raisetrack/archive/angel-registry-update-june-11-2026
Investing activity
Yevgeny Dibrov appears in 2 AI deals tracked by the Lounge deals desk, rounds totalling $86M. The rounds are mostly Seed, with a median round size of $66M. The most recent are Attestable (Seed, $20M, Aug 2026) and NewCore (Seed, $66M, Jun 2026).
Yevgeny Dibrov most often invests alongside Altimeter Capital, TLV Partners, Netz Capital and Charlie Songhurst, and the companies they back on Lounge are mostly in AI.
Deals
Frequently asked questions about Yevgeny Dibrov
Who is Yevgeny Dibrov?
He is co-founder and CEO of Armis, which he co-founded in 2015 with Nadir Izrael. He previously worked at Adallom and served in Unit 8200. He also invests as an angel in security and AI startups.
What AI startups has Yevgeny Dibrov invested in?
The Lounge deals desk lists Attestable (a $20M seed in August 2026) and NewCore (a $66M seed in June 2026). Attestable verifies AI systems with zero-knowledge proofs. NewCore builds identity security for humans, machines and AI agents.
What is Yevgeny Dibrov's angel check size?
Signal (NFX) lists a $5K to $50K range with a $25K sweet spot. This is a third-party profile figure, and Dibrov has not published a check size himself.
What stage and sectors does Yevgeny Dibrov invest in?
His recorded investments are at seed and Series A. They are mostly in security, with Signal also ranking him in developer tools, cloud infrastructure, SaaS and AI.
How should founders approach Yevgeny Dibrov?
He has no public pitch guidelines. His co-investors, such as Nadir Izrael, Assaf Rappaport and Cyberstarts partners, are one route to an introduction. His LinkedIn profile is the public contact point we found.
Is Yevgeny Dibrov an angel investor?
Yes. Yevgeny Dibrov invests personally as an angel.
What AI companies has Yevgeny Dibrov invested in?
Yevgeny Dibrov's AI investments include Attestable and NewCore. The 2 rounds on Lounge are listed on this page with amounts, dates and co-investors.
What stage does Yevgeny Dibrov invest at?
In the rounds tracked on Lounge, Yevgeny Dibrov has invested at Seed, with a median round of $66M.
Who does Yevgeny Dibrov co-invest with?
Yevgeny Dibrov's most frequent co-investors on Lounge are Altimeter Capital (1 deal), TLV Partners (1 deal), Netz Capital (1 deal), Charlie Songhurst (1 deal) and Nadir Izrael (1 deal).
How can founders reach Yevgeny Dibrov?
Founders on Lounge can see Yevgeny Dibrov's contact details in AI Investor Contacts (paid plans), check for a warm introduction through members who worked with them under Warm Paths, and add Yevgeny Dibrov to their Investor Pipeline to track the conversation.