Or Offer

Or Offer
Born1983 (age 42–43)
Israel
Alma materReichman University (B.A. in Business Administration, 2008)
OccupationsEntrepreneur, investor
Known forCEO and Founder of Similarweb
SpouseMarried
Children3

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.

Early life and education

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 dog operator in the Oketz (canine) unit.[1]

Following his military service, he studied at the Interdisciplinary Center Herzliya (now Reichman University) and received his B.A. in Business Administration in 2008.[2]

Career

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.[3][4]

In 2011, Offer directed the company’s shift from a consumer-oriented browser tool to a digital market analysis platform for businesses and investors.[5][6] 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.[7][8]

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.[1]

Other Ventures and Investments

Offer was a founding partner at AfterDownload, which was later acquired by IronSource.[9] 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.[10][11][12][13]

Recognition

Offer has been featured in TheMarker (2015), Globes (2017), and Ice (2021) lists of promising young leaders under the age of 40. He was also included in the list of Top 100 Influencers in the Israeli High Tech, Geektime (2015).[14][15][16][17]

Personal life

Offer lives in Kfar Shmaryahu with his wife and three children.[3]

References

  1. ^ a b ""אנגלית צריכה להיות שפה רשמית, וישראל תהיה הוליווד של ההייטק" | מוסף כלכליסט". newmedia.calcalist.co.il. Retrieved 2026-01-07.
  2. ^ "Reichman University - Herzliyan 2023". 2023-04-10. Retrieved 2026-01-06 – via Issuu.
  3. ^ a b ""לכו להיי-טק, המשכורות מטורפות - 20 אלף שקל ומעלה; למה ללמוד משפטים או ראיית חשבון?"". TheMarker (in Hebrew) – via archive.today.{{cite web}}: CS1 maint: deprecated archival service (link)
  4. ^ MacBride, Elizabeth. "SimilarWeb Is One Of Israel's Hottest Pre-IPO Companies. Here's Its CEO's Advice On Growing". Forbes. Retrieved 2026-01-28.
  5. ^ "Tech in Asia - Connecting Asia's startup ecosystem". www.techinasia.com. Retrieved 2026-01-07.
  6. ^ כהן, שגיא (27 October 2020). "חצי שנה אחרי שפיטרה 50 עובדים: השקעה של 120 מיליון דולר בסימילרווב הישראלית". TheMarker.{{cite news}}: CS1 maint: deprecated archival service (link)
  7. ^ ולדהורן, שירי חביב (2022-05-15). ""אני קפטן בספינה בסערה": מנכ"ל סימילרווב לא מתחרט על ההנפקה". Globes. Retrieved 2026-01-07.
  8. ^ "Similarweb completes NYSE IPO, at $1.6b valuation". Globes. 2021-12-05. Retrieved 2026-01-06.
  9. ^ Bort, Julie. "This guy was trying to build a jewelry business and wound up with a hugely successful tech company". Business Insider. Retrieved 2026-01-07.
  10. ^ "Moon Active valuation surges to $5 billion on back of $300 million Insight funding". CTECH - www.calcalistech.com. 2021-11-23. Archived from the original on 2025-11-15. Retrieved 2026-01-05.
  11. ^ "Guess what? Sheng Fu, Anna Fang and Or Offer are speaking at RISE". RISE | “The largest tech gathering in Asia”. 2015-12-03. Retrieved 2026-01-11.
  12. ^ "ריקו מונעת ממידע לדלוף בארגונים ומגייסת 30 מיליון..." tech12. 2022-06-03. Retrieved 2026-01-05.
  13. ^ CheckId. "אוניברסיטת רייכמן (חל"צ) / REICHMAN UNIVERSITY (CC) - 511936759". www.checkid.co.il (in Hebrew). Retrieved 2026-01-05.
  14. ^ "הצעירים המבטיחים של כל הזמנים". themarker (in Hebrew). Archived from the original on 2024-12-15. Retrieved 2026-01-05.
  15. ^ "אור עופר-G40 - ארבעים הצעירים המבטיחים 2017 - גלובס". Globes. Retrieved 2026-01-05.
  16. ^ ""הרגע המכונן היה הכתבה ב-CNET: הרעיון הופץ, השרתים קרסו וחיינו השתנו לעד"". Ice (in Hebrew). 2015-06-04. Retrieved 2026-01-05.
  17. ^ "100 האנשים המשפיעים בהייטק הישראלי". Geektime – via archive.today.{{cite web}}: CS1 maint: deprecated archival service (link)
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