What is Netcraft?

If you run ads, confirm Netcraft's purpose before blocking it. Some intelligence gatherers measure ad placements or evaluate pages for brand safety, and blocking those agents can interfere with advertising systems. If this one serves a different purpose, weigh any research visibility against sharing business or page-level data with third parties. Almost none of the top websites we track currently have robots.txt rules for Netcraft.

Yes. Netcraft is expected to follow robots.txt directives, so a disallow rule is the appropriate first step. Automatic Robots.txt can add and maintain that rule, while Agent Analytics lets you verify whether Netcraft respects it.

No special access. Netcraft can read publicly available pages but cannot bypass authentication. Assume anything you publish openly may be collected.

A client of Netcraft may be gathering competitive intelligence, measuring advertisements, or evaluating content for brand safety. The pages requested reflect that client's objective.

Agent Analytics tracks Netcraft visits in real time alongside every other known AI agent, crawler, and scraper. You can also check your server logs for requests whose user-agent string contains "Netcraft". Look for repeated requests to the same small group of commercial or ad-supported pages. Because Netcraft does not publish a verification method, any client can claim its identity and a log match is only a clue.