Web server extensions
Who left Shelf, and who still runs it
2 websites in the top 1M run Shelf, observed directly from the rendered page in the latest crawl.
Some companies running Shelf
Every row in a full list carries the prospect's whole detected stack.
Not currently available as a list.
What else they run
Google Tag Manager 100%Google Analytics 100%HTTP/3 100%Dart 100%Google Cloud CDN 50%Google Font API 50%HSTS 50%Open Graph 50%Preact 50%Proton Mail 50%
Share of a 2-domain sample of Shelf users that also run each.