Or Offer
Photo: Eden Offer, CC BY 4.0, via Wikimedia Commons25

Or Offer

Israeli entrepreneur and investor

Or Offer (born: 1983; Hebrew: אור עופר) is an Israeli entrepreneur and investor. He is the founder and chief executive officer (CEO) of Similarweb, a digital market intelligence company that was listed on the NYSE in 2021 at a valuation of $1.6 billion.2

From Wikipedia’s article on Or Offer (this version), CC BY-SA 4.0.

Born Jul 6, 1983.1

Companies

Holdings

Stock this person has reported owning, from the forms officers and directors file with the SEC. See the biggest insider stakes.

Shares held

  • Similarweb SMWB3,930,481 shares15$34.3M at $8.73Sep 24, 2026

As of each latest filing. The line shows shares held over time.

Recent filings

Early life and education

  • Date not recordedMae Boyar High School3
  • Date not recordedReichman University3

Offer was raised in Tzur Hadassah, near Jerusalem, in a family of artists and jewellery designers. He attended Boyar High School in Jerusalem and served in the Israel Defense Forces as a fighter and dog operator in the Oketz (canine) unit.

Following his military service, he studied at the Interdisciplinary Center Herzliya (now Reichman University) and received his B.A. in Business Administration in 2008.

From Wikipedia’s article on Or Offer (this version), CC BY-SA 4.0.

Career

Occupation: founder.6 7

Similarweb

After completing his military service, Offer founded a jewellery chain with physical and online stores. During market research, he identified the difficulty of finding similar websites online, which led him to develop a browser extension in 2007 that became the foundation of Similarweb. Offer has served as the company’s CEO since then.

In 2011, Offer directed the company’s shift from a consumer-oriented browser tool to a digital market analysis platform for businesses and investors. Under his leadership, Similarweb grew to over 1,200 employees across 12 offices. In May 2021, the company completed its initial public offering (IPO) on the NYSE with a valuation of approximately $1.6 billion.

In May 2026 Offer announced that he will be stepping down from his position as CEO within a year.

Offer is described as one of the few "sole founders" in the Israeli technology sector. His background in a combat unit, rather than in a military intelligence division (which is common among Israeli tech founders), has also been noted as distinctive.

Read more

Other Ventures and Investments

Offer was a founding partner at AfterDownload, which was later acquired by IronSource. He is also an active angel investor and serves on advisory boards of several startups, including Moon Active, OpenWeb, Reco, and GrowthSpace. In addition, he is a member of the General Assembly at Reichman University.

From Wikipedia’s article on Or Offer (this version), CC BY-SA 4.0.

Personal life

  • BornJul 6, 1983, Tzur Hadassah8
  • CitizenshipIsrael9
  • ResidenceKfar Shmaryahu10

Offer lives in Kfar Shmaryahu with his wife and three children.

From Wikipedia’s article on Or Offer (this version), CC BY-SA 4.0.

Sources

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