How many companies use turboSMTP?
As of October 2026, 2,238 companies show public evidence of using turboSMTP across the 1,789,103 company domains runsonwhat tracks. That makes turboSMTP the 14th most used of the 20 Email Delivery tools with confirmed customers, behind AuthSMTP (2,352). The number is a lower bound: a company counts only when a public record, such as a DNS entry or turboSMTP's code on its website, shows the tool in use.
Which companies use turboSMTP?
Companies that use turboSMTP include Sunat, My-personaltrainer, SSS, 101 Caffè and 1decision, according to runsonwhat's public-record scans (October 2026). The biggest industries among turboSMTP customers are IT services (14%) and construction (8.6%). The full list of 2,238 companies can be filtered by industry, company size and country on runsonwhat's turboSMTP page.
What industries use turboSMTP the most?
The industries with the most turboSMTP customers are IT services (14%), construction (8.6%) and software (6.2%), based on the 1,234 companies with a known industry. Relative to all companies runsonwhat tracks, turboSMTP stands out most in construction (2.6× the average rate).
Is turboSMTP more popular with startups or large companies?
turboSMTP is used mostly by small companies: of the 2,036 companies with a known size, 54% have up to 50 employees, 42% have 51 to 1,000 and 4.1% have more than 1,000.
Which countries use turboSMTP the most?
Most turboSMTP customers runsonwhat has found are based in Italy (47%), the United States (12%) and France (6.7%), out of 1,888 companies with a known country.
What are the most popular alternatives to turboSMTP?
By the number of companies using them, the most used Email Delivery tools other than turboSMTP are SendGrid (188,561), Amazon SES (58,199), Mailchimp Transactional (55,988) and Mailgun (47,339), according to runsonwhat (October 2026). Not every tool in a category does the same job, so check each one's page; runsonwhat ranks all Email Delivery tools at https://www.runsonwhat.com/tools/email-delivery.
What other tools do turboSMTP customers use?
turboSMTP customers use MailUp, Aruba.it and iubenda far more often than the average company. For example, 4.9% of turboSMTP customers also run MailUp, 21× the rate among all companies runsonwhat tracks, and 8.4% run Aruba.it.
How does runsonwhat know a company uses turboSMTP?
runsonwhat reads public records only. For turboSMTP, that means email records (SPF, MX or DKIM) that authorize turboSMTP or turboSMTP on the company's own subprocessor list. A company is listed only when one of these direct records is present, and each match keeps the record it came from. DNS is rechecked weekly and websites about monthly.
MailUpMarketing21×more likely
Aruba.itHosting & Cloud13×more likely
iubendaSecurity & Compliance12×more likely
MailjetEmail Delivery2.1×more likely
BrevoMarketing2.0×more likely
OVHcloudHosting & Cloud1.9×more likely
MatomoAnalytics1.9×more likely
ExclaimerWorkspace1.7×more likely
Microsoft AdsAds & Pixels1.7×more likely
CookiebotSecurity & Compliance1.5×more likely
