Tamar Bar-Ilan
About Tamar Bar-Ilan
Tamar Bar-Ilan is co-founder and CTO of Cyera, a data security company based in New York. Crunchbase says Bar-Ilan graduated from the IDF's Talpiot program and then joined Unit 8200, where Bar-Ilan built and ran the unit's cloud security division.
Bar-Ilan co-founded Cyera with Yotam Segev, now Cyera's CEO. Crunchbase gives the founding year as 2021, and Sequoia lists Cyera as one of its portfolio companies. Tracxn lists a bachelor's degree from The Hebrew University of Jerusalem (2013).
Public databases show a small number of angel investments, all made from 2025 onward. Crunchbase lists four personal investments and Tracxn lists two, so the counts differ by source. The ones that can be confirmed are Daylight, Fabrix Security and Upriver.
Bar-Ilan often appears in rounds alongside Segev. Both are named as angels in the Upriver round.
Upriver, an Israeli startup building an AI-native data engineering platform, announced a $14M seed round in June 2026. Valley Capital Partners and Hetz Ventures led it. The Calcalist report on the round names Bar-Ilan, Segev, New Relic founder Lew Cirne and Abe Gong of Great Expectations among the angels.
Upriver was founded by Ido Bronstein and Omri Lifshitz. Its product uses agents to find data quality problems, maintain pipelines and create datasets.
The disclosed investments are early-stage rounds (seed and Series A) in enterprise infrastructure, data and security companies. Tracxn describes the focus as High Tech and Enterprise Infrastructure. Most of the companies are Israeli or have Israeli founders, though the sources do not describe a stated geographic focus. Bar-Ilan has not made public statements about check size or what they look for in founders, so neither is stated here.
- Upriver: AI-native data engineering platform. Bar-Ilan took part in its $14M seed round in June 2026.
- Fabrix Security: Tracxn and StartupHub list Bar-Ilan in its $8M seed round in September 2025.
- Daylight: Tracxn lists Bar-Ilan in its $7M seed round (July 2025) and $33M Series A (November 2025).
- crunchbase.com/person/tamar-bar-ilan
- tracxn.com/d/people/tamar-bar-ilan/__rvb9Di4fIsX3sh8lRXaR6t8OH88s_uN0a
- calcalistech.com/ctechnews/article/byf53eewzl
- siliconangle.com/2026/06/11/upriver-raises-14m-automate-enterprise-dat
- startuphub.ai/investors/tamar-bar-ilan
- sequoiacap.com/founder/tamar-bar-ilan
- linkedin.com/in/tamar-bar-ilan-67bb481a7
Investing activity
Tamar Bar-Ilan appears in 1 AI deal tracked by the Lounge deals desk, rounds totalling $14M. The rounds are mostly Seed, with a median round size of $14M. The most recent is Upriver (Seed, $14M, Jun 2026).
Tamar Bar-Ilan most often invests alongside Valley Capital Partners, Hetz Ventures, Yotam Segev and Abe Gong, and the companies they back on Lounge are mostly in AI.
Deals
Frequently asked questions about Tamar Bar-Ilan
Who is Tamar Bar-Ilan?
Tamar Bar-Ilan is co-founder and CTO of Cyera, a data security company. Bar-Ilan is also an angel investor in early-stage startups.
Has Tamar Bar-Ilan invested in AI startups?
Yes. Bar-Ilan was an angel in Upriver's $14M seed round in June 2026. Upriver builds an AI-native data engineering platform.
What stage does Tamar Bar-Ilan invest in?
The public record shows seed and Series A rounds. Examples are Upriver (seed), Fabrix Security (seed) and Daylight (seed and Series A).
What is Tamar Bar-Ilan's check size?
Check size is not public. The rounds listed show total round sizes, not Bar-Ilan's individual investment.
How can founders pitch Tamar Bar-Ilan?
No public pitch process or contact details were found. Bar-Ilan has a LinkedIn profile, and a warm introduction through Cyera's network or co-investors may be more practical.
What did Tamar Bar-Ilan build before investing?
Bar-Ilan co-founded Cyera with Yotam Segev and serves as its CTO. Before that, Bar-Ilan ran the cloud security division in Unit 8200, according to Crunchbase.
Is Tamar Bar-Ilan an angel investor?
Yes. Tamar Bar-Ilan invests personally as an angel.
What AI companies has Tamar Bar-Ilan invested in?
Tamar Bar-Ilan's AI investments include Upriver. The 1 round on Lounge are listed on this page with amounts, dates and co-investors.
What stage does Tamar Bar-Ilan invest at?
In the rounds tracked on Lounge, Tamar Bar-Ilan has invested at Seed, with a median round of $14M.
Who does Tamar Bar-Ilan co-invest with?
Tamar Bar-Ilan's most frequent co-investors on Lounge are Valley Capital Partners (1 deal), Hetz Ventures (1 deal), Yotam Segev (1 deal), Abe Gong (1 deal) and Lew Cirne (1 deal).