Cloudflare Accuses AI Startup Perplexity of Stealth Crawling in Content Scraping Controversy
August 4, 2025
Cloudflare has raised concerns about the AI search startup Perplexity, alleging that it employs 'stealth crawling' techniques to bypass restrictions meant to block its web crawlers from accessing certain sites.
This scraping behavior reportedly affects tens of thousands of domains, generating millions of requests daily, despite website owners' attempts to protect their content using the Robots.txt file.
The controversy surrounding Perplexity could have significant implications for its potential relationship with Apple, particularly as Apple emphasizes ethical data sourcing in its AI strategy.
The relationship between AI companies and content publishers is increasingly viewed as parasitic, with AI bots gathering data without compensation, which threatens publishers' revenue.
As legal and ethical issues surrounding data scraping remain unresolved, Perplexity is facing mounting pressure to justify its data acquisition methods amid scrutiny from media companies.
Cloudflare's CEO, Matthew Prince, has voiced concerns about the existential threat AI scraping poses to publishers, prompting the company to implement measures that allow websites to charge AI firms for content access.
In response to these concerns, Perplexity has launched a Publisher Program aimed at compensating content partners, while other AI firms are negotiating access to content with major publishers.
This ongoing situation signals a potential paradigm shift in AI ethics and legal boundaries, as regulators are closely monitoring the industry amidst efforts to clarify fair use in AI contexts.
The tech community has reacted strongly, drawing comparisons between Perplexity's scraping methods and those of state-sponsored hackers, raising concerns over the integrity of web standards.
This incident is not Perplexity's first controversy; it has faced previous allegations of unauthorized scraping and plagiarism from various news outlets, heightening scrutiny over AI companies' practices.
Perplexity's spokesperson dismissed the accusations as part of Cloudflare's marketing strategy, claiming that the identified bot was not theirs.
The clash between Cloudflare and Perplexity highlights a fundamental tension in the AI era, as AI developers require vast amounts of data while publishers struggle to protect their content and revenue.
Summary based on 13 sources
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Sources

The Verge • Aug 4, 2025
Cloudflare says Perplexity’s AI bots are ‘stealth crawling’ blocked sites
TechCrunch • Aug 4, 2025
Perplexity accused of scraping websites that explicitly blocked AI scraping
Yahoo Finance • Aug 4, 2025
Perplexity accused of scraping websites that explicitly blocked AI scraping
Ars Technica • Aug 4, 2025
AI site Perplexity uses “stealth tactics” to flout no-crawl edicts, Cloudflare says