Blogs
Who left Substack, and who still runs it
28 websites in the top 1M run Substack, observed directly from the rendered page in the July 2026 crawl.
8
stopped running it that month
1
of those are 11–500 employees
50
adopted it in the last year
Confirmed across two consecutive crawls, not a single month. Build the list →
Some companies running Substack
Every row in a full list carries the prospect's whole detected stack.
Not currently available as a list.
What else they run
HTTP/3 100%Node.js 100%HSTS 100%Google Analytics 100%Cloudflare Bot Management 100%Cloudflare Browser Insights 100%Express 100%Datadog 100%Cloudflare 100%Open Graph 100%
Share of a 28-domain sample of Substack users that also run each.