Original research

SEO data studies

Dated, reproducible snapshots of the technical SEO ecosystem. Every study includes its method, limitations, and downloadable source data.

Robots.txt and sitemap benchmark

47 of 49 sites served a readable robots.txt file; 34 of those 47 declared at least one sitemap.

Across 47 readable files, only ByteSpider had an explicit root-wide disallow, on one site.

One Common Crawl index contained 46 of 49 exact SEO software homepages in the fixed cohort.

The eight-plugin cohort spanned rounded active-install bands from 10,000 to 10 million.

Among 12 matched entities, 11 had an official website, 10 inception data, and 9 headquarters data.

All 10 packages were available and none of their latest versions carried an npm deprecation notice.

Eight of nine reviewed repositories were not archived; seven had received a push since May 2026.

All seven snapshots were collected September 13, 2026.