JavaScript frameworks
Who left Prototype, and who still runs it
2,029 websites in the top 1M run Prototype, observed directly from the rendered page in the July 2026 crawl.
385
stopped running it that month
43
of those are 11–500 employees
544
adopted it in the last year
Confirmed across two consecutive crawls, not a single month. Build the list →
Some companies running Prototype
Every row in a full list carries the prospect's whole detected stack.
Not currently available as a list.
What else they run
jQuery 81%Google Analytics 67%PHP 63%Cloudflare 53%Google Tag Manager 48%HSTS 46%MySQL 45%core-js 43%Open Graph 42%Cart Functionality 41%
Share of a 2,029-domain sample of Prototype users that also run each.