Fastmail: Email hosting. We've found 1,052 companies using Fastmail, most often in Software (17%) and IT Services (14%), typically with 11–50 employees and 53% based in United States.
Customers1,052companies use it
Most popular withVideo Games8.0× more likely than average
Typical customer11–50employees · mostly United States
We've found 1,052 companies using Fastmail among the 611,233 we've scanned so far. We only count a company when a direct public record backs it up.
What kind of companies use Fastmail?
Fastmail customers are most often in Software (17%), IT Services (14%) and Internet (12%). The most common company size is 11–50 employees (72% of customers with a known size).
Which countries use Fastmail the most?
Most Fastmail customers we've found are in United States (53%), United Kingdom (11%) and Canada (6%).
What are the alternatives to Fastmail?
The most used alternatives in the same category are Microsoft 365 (685,121 companies), Google Workspace (384,327 companies), Apple Business (107,133 companies) and Exclaimer (33,160 companies).
How does runsonwhat know a company uses Fastmail?
We read public traces only. For Fastmail that means the company's email records (SPF, MX, DKIM), a subdomain that points at Fastmail and the company's published subprocessor list. Every match keeps the record it came from.