Last updated 2026-07-20
- Raised $75M Seed round led by Battery Ventures, Nov 2025
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About
Ariel Zeitlin is a cybersecurity engineer and researcher who co-founded two Israeli cybersecurity companies: Guardicore and Tenzai. Guardicore was acquired by Akamai in 2021 for $600 million. Tenzai, founded in May 2025, is developing an AI-based platform for automated penetration testing and raised a $75 million seed round in November 2025.
Portfolio
No portfolio companies in this dataset yet.
Investment activity
Portfolio by sector
Cyber Security1
Q&A
- What is Ariel Zeitlin's primary investment focus by sector?
- Ariel Zeitlin has concentrated investments in the Cyber Security sector, with OneLayer as a notable portfolio company in this area.
- Which funding stage does Ariel Zeitlin typically invest in?
- Ariel Zeitlin has participated in Seed stage funding rounds, as seen with the investment in OneLayer.
- Can you name a key company in Ariel Zeitlin's portfolio?
- OneLayer is a key company in Ariel Zeitlin's portfolio, specializing in Zero Trust Security and Asset Management for Private 5G/LTE Devices.
- When did Ariel Zeitlin make their most recent investment?
- Ariel Zeitlin made an investment in March 2022, which was in OneLayer.
- What is the business model of OneLayer, a company in Ariel Zeitlin's portfolio?
- OneLayer operates on a B2B business model, providing Zero Trust Security and Asset Management for Private 5G/LTE Devices.
Full data — links, identifiers, deals & radar signals (jobs, patents, research, more)
Identifiers & details
| Founded | 2025-5 |
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