TestingBot is a remotly hosted Selenium Grid platform with 1500+ combinations of Browsers and Operating Systems.
TestingBot's aim is to provide a simple to use system for cross browser testing
https://testingbot.com/
The TestingBot cloud allows you to run tests against your webapp on +1500 different browser combinations.
TestingBot can support test frameworks designed with Appium, PHP, Java, Ruby, Python, NodeJS, C# and many more technolgies.
https://testingbot.com/support/gettin...
Test scritps desinged with Katalon Studio is very easy to execute on TestingBot with various desired capabilites.
https://www.katalon.com/