How much does a Selenium test cost?
Selenium Testing is Free OpenSource Tools .So to start using this tool there is no cost involvement . If you use local selenium Grid ,however these is a limitation in browser variation ,its a Zero cost. If you want to scale up the test execution by doing more parallale execution and wants to cover all available browser combination from latest to legacy and also in all OS plateforms , there are plateforms like LambdaTest at very reasonable cost.