FEATUREDHacker News Frontpage· rssEN13:59 · 09·02
→Three sites made 215,128 "best software" pages for AI. Perplexity cites them
Trellner Research tested Perplexity's sonar and sonar-pro across 380 software categories. 59.8% of citations came from domains ranked worse than #100,000, and 23.4% from domains not in the top million at all. Three sites—wifitalents.com, worldmetrics.org, and gitnux.org—published 215,128 machine-generated "best software" pages between them, all registered after December 2023. Two of them set their homepage HTML title to "Facts & Grounding Page" with a meta description calling it a "machine-readable record"—clearly written for retrieval models, not people. Separately, guideflow.com, a vendor's marketing blog, became the third most-cited source, ahead of Gartner. The test only covered Perplexity, not Google, so the finding is specific to one engine, but it shows how easily retrieval layers treat bulk-generated SEO content as trustworthy evidence.
#Perplexity#Trellner Research#guideflow.com
why featured
Featured · importance 82 · hook + knowledge + resonance
editor take
59.8% of Perplexity's software-recommendation citations come from domains ranked worse than #100,000, with three machine-generated sites pumping out 215,128 pages.
sharp
This one's worth opening because it nails down the 'source pollution' problem in AI search with hard numbers. Trellner Research tested two Perplexity models across 380 software categories and kept every citation. Of the 7,534 URLs returned, nearly 60% came from domains ranked worse than #100,000 on the Tranco list, and 23.4% weren't in the top million at all. The wildest find: wifitalents.com, worldmetrics.org, and gitnux.org. All three were registered after December 2023, share the same DNS and page template, and set their homepage HTML title to 'Facts & Grounding Page'—a signal clearly aimed at retrieval models, not humans. Together they pumped out 215,128 machine-generated 'best software' pages and got cited across 41 categories.
The other surprise is guideflow.com, a product demo company's blog, which ranked third in citations—ahead of Gartner. It doesn't review software; it just publishes a ton of listicles, and the retrieval layer treated them as trustworthy evidence across 96 categories. That's not deceptive, but it shows how little discrimination the retrieval layer applies to SEO content.
The test only covered Perplexity, not Google or other engines, so don't generalize. But if you use AI to ask 'what's the best tool for X,' this data is a solid reason to double-check the sources.
HKR breakdown
hook ✓knowledge ✓resonance ✓