3,596 companies use SparkPost, as of October 2026.
SparkPost: Email delivery. We've found 3,596 companies using SparkPost, most often in Software (12%) and IT Services (11%), typically with 11–50 employees and 33% based in United States.
Customers3,596companies use it
Most popular withHealth Club22× more likely than average
Typical customer11–50employees · mostly United States
We've found 3,596 companies using SparkPost among the 310,995 we've scanned so far. We only count a company when a direct public record backs it up.
What kind of companies use SparkPost?
SparkPost customers are most often in Software (12%), IT Services (11%) and Financial Services (10%). The most common company size is 11–50 employees (44% of customers with a known size).
Which countries use SparkPost the most?
Most SparkPost customers we've found are in United States (33%), Czechia (13%) and United Kingdom (9%).
What are the alternatives to SparkPost?
The most used alternatives in the same category are SendGrid (105,086 companies), Amazon SES (38,941 companies), Mailgun (28,936 companies) and Mailchimp Transactional (28,445 companies).
How does runsonwhat know a company uses SparkPost?
We read public traces only. For SparkPost that means the company's email records (SPF, MX, DKIM), a subdomain that points at SparkPost and the company's published subprocessor list. Every match keeps the record it came from.
BrazeMarketing12×more likely
SegmentAnalytics3.2×more likely
CursorDev Tools2.9×more likely
JamfSecurity & Compliance2.8×more likely
DatadogMonitoring2.4×more likely
MiroCollaboration2.4×more likely
SlackCollaboration2.3×more likely
Reddit AdsAds & Pixels1.9×more likely
Mailchimp TransactionalEmail Delivery1.8×more likely
ZendeskSupport & Docs1.8×more likely
ZoomCollaboration1.7×more likely
DocuSignFinance & Legal1.5×more likely
