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Study finds only 34.5% of free proxies work, thousands tamper with traffic

Crawlbase reports on two peer-reviewed studies that tested 640,600 free proxies, finding that just over a third were functional and many altered traffic.

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Infrastructure & Proxies Primary source analysis / significance 3

Briefing

Why it matters

Free proxy lists are widely used in web scraping, but this data underscores their unreliability and security risks. Practitioners relying on free proxies risk low success rates and potential data corruption, reinforcing the case for paid or residential proxy services for production scraping.

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Watch next

Will the proxy industry see a shift toward verified or audited proxy pools in response to these findings?

Topics: Crawlbase, free-proxies, proxy-reliability, web-scraping, traffic-tampering