AuthSMTP: Outbound SMTP relay. We've found 2,312 companies using AuthSMTP, most often in IT Services (11%) and Hospitality (8%), typically with 11–50 employees and 36% based in United Kingdom.
Customers2,312companies use it
Most popular withWaste Management21× more likely than average
Typical customer11–50employees · mostly United Kingdom
We've found 2,312 companies using AuthSMTP among the 609,620 we've scanned so far. We only count a company when a direct public record backs it up.
What kind of companies use AuthSMTP?
AuthSMTP customers are most often in IT Services (11%), Hospitality (8%) and Financial Services (7%). The most common company size is 11–50 employees (52% of customers with a known size).
Which countries use AuthSMTP the most?
Most AuthSMTP customers we've found are in United Kingdom (36%), United States (33%) and Netherlands (7%).
What are the alternatives to AuthSMTP?
The most used alternatives in the same category are SendGrid (183,239 companies), Amazon SES (56,024 companies), Mailchimp Transactional (54,040 companies) and Mailgun (45,399 companies).
How does runsonwhat know a company uses AuthSMTP?
We read public traces only. For AuthSMTP that means the company's email records (SPF, MX, DKIM) and the company's published subprocessor list. Every match keeps the record it came from.
