PaaS
Who left Fly.io, and who still runs it
200 websites in the top 1M run Fly.io, observed directly from the rendered page in the July 2026 crawl.
69
stopped running it that month
4
of those are 11–500 employees
250
adopted it in the last year
Confirmed across two consecutive crawls, not a single month. Build the list →
Some companies running Fly.io
Every row in a full list carries the prospect's whole detected stack.
Not currently available as a list.
What else they run
Cloudflare 80%Google Analytics 65%Open Graph 60%core-js 44%HTTP/3 43%Google Tag Manager 42%React 40%HSTS 40%Tailwind CSS 39%Google Font API 39%
Share of a 200-domain sample of Fly.io users that also run each.