Ans : OpKey Personal is used when you automation testing for one to one basis. It is based on Selenium Web Driver, so if you are using selenium web driver for automation, switching to OpKey will help you immensely. It is available for FREE. OpKey Team is a higher and paid edition of OpKey. It is made for automation teams of sizes 2-many. It also has support for various automation tools across platforms web, mobile, webservices etc. OpKey BPT is a higher and paid edition of OpKey. It is made for team which follow Business Process Test methodology in automation.\