Personalisation
Who left Clerk.io, and who still runs it
539 websites in the top 1M run Clerk.io, observed directly from the rendered page in the July 2026 crawl.
30
stopped running it that month
4
of those are 11–500 employees
145
adopted it in the last year
Confirmed across two consecutive crawls, not a single month. Build the list →
Some companies running Clerk.io
Every row in a full list carries the prospect's whole detected stack.
Not currently available as a list.
What else they run
Google Analytics 91%Cart Functionality 80%core-js 78%Google Tag Manager 78%jQuery 75%Cloudflare 71%Open Graph 69%HSTS 64%Bootstrap 58%HTTP/3 57%
Share of a 539-domain sample of Clerk.io users that also run each.