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Gil Elbaz

Founder and Chairman of the Board of Common Crawl; co-founder of Applied Semantics

Gil Elbaz founded Common Crawl in 2007 and serves as Chairman of its Board of Directors. Common Crawl's history says Elbaz's aim was to make web-scale crawl data available to researchers who lack the resources to run their own crawlers, and that Elbaz had earlier co-founded Applied Semantics.21

Career

Elbaz co-founded Applied Semantics, which Google acquired in 2003 and whose technology was incorporated into Google AdSense. In 2007 Elbaz founded Common Crawl to give researchers access to web-scale crawl data, and the foundation began collecting data in 2008.2

Elbaz is Chairman of Common Crawl's Board of Directors. Over time the corpus became a common starting point for language-model training sets, including Google's C4 in 2019 and later filtered datasets such as RefinedWeb and FineWeb.12

Work

Career timeline

  1. 2003

    Applied Semantics, which Elbaz co-founded, was acquired by Google.2

  2. 2007

    Founded Common Crawl as a nonprofit provider of open web crawl data.2

  3. 2008

    Common Crawl began collecting data with a custom Hadoop-based crawler.2

  4. 2013

    Common Crawl switched to an Apache Nutch-based crawler and the WARC format.2

Other documented roles

Roles the sources document but that are not confirmed as current.

  • Co-founder, Applied Semantics2

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References · reviewed Oct 21, 2026

  1. 1.
    Our Team — Common Crawl (external site: commoncrawl.org)

    Common Crawl Foundation · Official page · accessed Oct 21, 2026

  2. 2.
    About — Common Crawl (history and organization) (external site: commoncrawl.org)

    Common Crawl Foundation · Official page · accessed Oct 21, 2026

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