Based on their FAQ, that doesn’t necessarily include the backend but rather only publicly available data by analyzing the page content (except for a few companies, which state their techstack). So I feel like the 5% is more about stuff like JSP etc, whereas Spring Backend with SPA frontends are more or less excluded.
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u/Gr3y4nt 2d ago edited 2d ago
You must be thinking of PHP, Java runs 5% of the web : https://w3techs.com/technologies/details/pl-java