Development; JavaScript frameworks
Who left JSS, and who still runs it
2,958 websites in the top 1M run JSS, observed directly from the rendered page in the July 2026 crawl.
879
stopped running it that month
104
of those are 11–500 employees
1,447
adopted it in the last year
Confirmed across two consecutive crawls, not a single month. Build the list →
Some companies running JSS
Every row in a full list carries the prospect's whole detected stack.
Not currently available as a list.
What else they run
React 88%core-js 75%Google Analytics 73%HSTS 65%Cloudflare 63%Open Graph 63%MUI 53%Google Font API 48%Google Tag Manager 47%HTTP/3 47%
Share of a 2,958-domain sample of JSS users that also run each.