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Who left SparkPost, and who still runs it
2,256 websites in the top 1M run SparkPost, observed directly from the rendered page in the July 2026 crawl.
91
stopped running it that month
13
of those are 11–500 employees
364
adopted it in the last year
Confirmed across two consecutive crawls, not a single month. Build the list →
Some companies running SparkPost
Every row in a full list carries the prospect's whole detected stack.
Not currently available as a list.
What else they run
Google Analytics 80%Open Graph 71%jQuery 69%Google Tag Manager 68%core-js 60%Cloudflare 60%HSTS 51%PHP 46%Google Font API 43%Bootstrap 40%
Share of a 2,256-domain sample of SparkPost users that also run each.