There is a big difference between running a website speed test and load testing. Sometimes people confuse the two.
Website Speed Test
A website speed test typically measures PHP (which includes MySQL + PHP) response times. Or in other words, the total load time of a page. Most people use Pingdom or GTmetrix for that and look at the HTML render/wait time, and compare it with their current host. So you can set up with us and put your site on a subdomain like xyz.kinsta.com and then compare it to your current site on its live domain.
Check out our post with some popular website speed test tools.
Load testing goes above and beyond speed tests and is typically used to simulate certain conditions, such as a high surge of traffic or targeted concurrent users. Unfortunately, automated load testing tools aren’t perfect. If your load test doesn’t simulate realistic user-scenarios from the real world, then it will most likely lead you to the wrong conclusions. See this checklist for a reliable load test.
We do work with companies that run tests like that on WordPress hosts, such as Review Signal, and there you can see comparisons of us versus others in the industry. They run the tests the right way and have the process down to a science. If you want to run a load test on our platform, we ask that you first reach out to our support team.