Payment processors
Who left American Express, and who still runs it
18,165 websites in the top 1M run American Express, observed directly from the rendered page in the July 2026 crawl.
2,302
stopped running it that month
68
of those are 11–500 employees
6,231
adopted it in the last year
Confirmed across two consecutive crawls, not a single month. Build the list →
Some companies running American Express
Every row in a full list carries the prospect's whole detected stack.
Not currently available as a list.
What else they run
Cloudflare 100%Visa 100%Mastercard 100%Open Graph 100%Shopify 99%HSTS 99%HTTP/3 99%Priority Hints 97%core-js 95%Cart Functionality 95%
Share of a 3,000-domain sample of American Express users that also run each.