Review on Testable.io by Dave Russell

The most useful thing about this tool is that it can be used to simulate any kind of traffic for your website or web application. It's free so there are no restrictions in terms of using it. I don't like how you have to manually create all the scripts that you want to use as tests. You also cannot run them from another computer without having access to their server. This makes things more complicated than they should be when running multiple tests at once. If you're looking for something simple but powerful then this might not be what you need because you'll end up spending too much time creating everything by yourself. We needed some way to evaluate our applications' performance under heavy loads.