JavaScript frameworks
Who left Backbone.js, and who still runs it
10,000 websites in the top 1M run Backbone.js, observed directly from the rendered page in the July 2026 crawl.
1,910
stopped running it that month
193
of those are 11–500 employees
4,491
adopted it in the last year
Confirmed across two consecutive crawls, not a single month. Build the list →
Some companies running Backbone.js
Every row in a full list carries the prospect's whole detected stack.
Not currently available as a list.
What else they run
Underscore.js 100%Open Graph 86%core-js 82%Cloudflare 80%Google Analytics 76%jQuery 74%HTTP/3 61%HSTS 59%Google Font API 57%Google Tag Manager 56%
Share of a 3,000-domain sample of Backbone.js users that also run each.