Web frameworks; Web servers
Who left Flask, and who still runs it
58 websites in the top 1M run Flask, observed directly from the rendered page in the July 2026 crawl.
29
stopped running it that month
5
of those are 11–500 employees
121
adopted it in the last year
Confirmed across two consecutive crawls, not a single month. Build the list →
Some companies running Flask
Every row in a full list carries the prospect's whole detected stack.
Not currently available as a list.
What else they run
Python 100%jQuery 86%Odoo 83%Less 83%PostgreSQL 83%Open Graph 83%Popper 79%Google Font API 78%Select2 64%Moment.js 59%
Share of a 58-domain sample of Flask users that also run each.