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[Quantcast](https://www.quantcast.com) uses machine-learning-driven, real-time audience insights to radically simplify advertising for brands and customers such as BuzzFeed, Dell, and Fiat Chrysler.

Founded in 2006, Quantcast's engineering team had amassed thousands of repositories. This growth made refactoring a difficult and time-consuming task for an unaided engineer to tackle.

Learn how, Sourcegraph's [multi-repository code search](/product/code-search-navigation) makes [large scale refactoring at Quantcast](/case-studies/quantcast) systematic, safe, and efficient.

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Ryan Blunden

Founded in 2006, Quantcast's engineering team had amassed thousands of repositories. Learn how after deploying Sourcegraph, Quantcast was able to do major refactors with confidence.

How Sourcegraph code search enabled large scale refactoring at Quantcast

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