Payment processors
Who left Mastercard, and who still runs it
20,341 websites in the top 1M run Mastercard, observed directly from the rendered page in the July 2026 crawl.
2,258
stopped running it that month
67
of those are 11–500 employees
6,829
adopted it in the last year
Confirmed across two consecutive crawls, not a single month. Build the list →
Some companies running Mastercard
Every row in a full list carries the prospect's whole detected stack.
Not currently available as a list.
What else they run
Visa 100%Cloudflare 100%Open Graph 100%HSTS 99%Shopify 99%HTTP/3 99%Priority Hints 97%Cart Functionality 95%core-js 95%American Express 89%
Share of a 3,000-domain sample of Mastercard users that also run each.