SiteData

Current judgment: SiteData looks worth trying if you do external website research, but the evidence does not yet prove it is a category-standard tool. Heat proof mainly comes from repeated X posts about features, giveaways, rankings, and recommendations, which show attention rather than capability on their own. Usability proof is stronger in the feature-breakdown posts and one longer Zhihu article, which support real use cases in pre-campaign filtering, competitor digging, and related-site discovery, though public hands-on samples are still limited.

In practice, it is not just a traffic checker. Based on the cited evidence, SiteData combines traffic trends, Google Ads activity and stats, reverse AdSense lookup, WHOIS/RDAP, keywords, backlinks, and rankings so users can move from “this site is growing” to “why is it growing, is it running ads, and what other sites may be connected.” It should not be confused with Google Analytics or internal product analytics. A better analogy is a Similarweb-like external intelligence layer plus ad clues and related-site tracing.