Nadir Izrael
About Nadir Izrael
Nadir Izrael co-founded Armis in 2015 with Yevgeny Dibrov, a friend from his army service. He was its CTO. SecurityWeek lists him as Group Vice President, Armis, from ServiceNow.
Before Armis he spent four years as a Senior Software Manager at Google, working on Google Maps and Google Autocomplete. He began his career in the Israel Defense Forces in Unit 8200, first as a software developer and then as a team leader, and he reached the rank of Captain.
He is also a member at Cyberstarts, a venture firm that invests in cybersecurity startups. NFX Signal lists him in the San Francisco Bay Area.
NFX Signal records 10 to 11 investments by Nadir Izrael. Rounds it lists include Atmosec (Seed, Dec 2021), Talon Cyber Security (Seed, Jan 2022), Dream Security (Seed, Oct 2022), Axiom (Seed, Dec 2022), Backslash Security (Seed, Mar 2023), Atero (Seed, Jul 2024) and Daylight Security (Seed, Jul 2025, then Series A, Nov 2025).
In many of these rounds his co-investors include Yevgeny Dibrov and other Israeli security founders.
In August 2026 he took part in Attestable's $20M seed round, led by TLV Partners and Altimeter Capital. Calcalist and TheSaaSNews both name him among the private investors in the round.
Attestable was founded in 2025. It uses zero-knowledge cryptography to verify what calculations an AI system performs without exposing the model or sensitive data.
His recorded investments are mostly in cybersecurity at the seed stage, and he is ranked on NFX Signal for seed and Series A cybersecurity. Aggregator listings describe a focus on enterprise, security and deep tech, with Israel and the United States as geographies.
NFX Signal shows an investment range of $5K to $50K with a sweet spot of $25K. This is profile data from NFX, not a statement from him, so confirm it directly. We found no public statement from him on what he looks for in a pitch.
- Attestable: verifies AI system behavior with zero-knowledge cryptography. He joined its $20M seed in August 2026.
- Daylight Security: cybersecurity company. NFX lists him in its Seed (Jul 2025, $7M) and Series A (Nov 2025, $33M) rounds.
- Atero: NFX lists him in its $12M seed in Jul 2024.
- Backslash Security: NFX lists him in its $8M seed in Mar 2023.
- Axiom: NFX lists him in its $7M seed in Dec 2022.
- Dream Security: NFX lists him in its $20M seed in Oct 2022.
- Talon Cyber Security: NFX lists him in its $17M seed in Jan 2022.
- Atmosec: NFX lists him in its $6M seed in Dec 2021.
- signal.nfx.com/investors/nadir-izrael
- securityweek.com/contributors/nadir-izrael
- rsaconference.com/experts/nadir-izrael
- calcalistech.com/ctechnews/article/h1ddvrd8mg
- thesaasnews.com/news/attestable-raises-20m-seed
- app.dealroom.co/news/feed/israeli-startup-attestable-raises-20m-to-ver
- shizune.co/investors/machine-learning-angel-investors-israel
Investing activity
Nadir Izrael appears in 1 AI deal tracked by the Lounge deals desk, rounds totalling $20M. The rounds are mostly Seed, with a median round size of $20M. The most recent is Attestable (Seed, $20M, Aug 2026).
Nadir Izrael most often invests alongside Altimeter Capital, TLV Partners, Yevgeny Dibrov and Netz Capital, and the companies they back on Lounge are mostly in AI.
Deals
Frequently asked questions about Nadir Izrael
Does Nadir Izrael invest in AI startups?
Yes. He was a private investor in Attestable's $20M seed round in August 2026. Most of his other recorded investments are in cybersecurity.
What is Nadir Izrael's typical angel check size?
NFX Signal lists a range of $5K to $50K with a sweet spot of $25K. He has not publicly stated this himself, as far as we found.
What stage does Nadir Izrael invest in?
His recorded deals are mainly seed rounds. He also appears in Daylight Security's Series A.
Who is Nadir Izrael?
He co-founded Armis with Yevgeny Dibrov and was its CTO. He is also a member at Cyberstarts and worked at Google before founding Armis.
Should I pitch Nadir Izrael if I am not building in security?
His public record is concentrated in cybersecurity and AI security. A founder outside those areas should expect a weaker fit, though we found no stated exclusions.
Is Nadir Izrael an angel investor?
Yes. Nadir Izrael invests personally as an angel.
What AI companies has Nadir Izrael invested in?
Nadir Izrael's AI investments include Attestable. The 1 round on Lounge are listed on this page with amounts, dates and co-investors.
What stage does Nadir Izrael invest at?
In the rounds tracked on Lounge, Nadir Izrael has invested at Seed, with a median round of $20M.
Who does Nadir Izrael co-invest with?
Nadir Izrael's most frequent co-investors on Lounge are Altimeter Capital (1 deal), TLV Partners (1 deal), Yevgeny Dibrov (1 deal), Netz Capital (1 deal) and Charlie Songhurst (1 deal).
How can founders reach Nadir Izrael?
Founders on Lounge can see Nadir Izrael'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 Nadir Izrael to their Investor Pipeline to track the conversation.