ServiceNow's Automated Test Framework module (ATF) was introduced in the Istanbul version of ServiceNow as part of the platform.
Many people came to our stand at NowForum London confused as to the pros and cons of each tool and ask us to explain what the differences are. There are many many differences but the fundamental one and the easiest to explain quickly, is that ATF does automated testing, whereas AutotestPro enables full life-cycle DevOps automation, including automated testing (and from a business scenario/user story perspective).
There are many other differences between the two tools, for example the underlying technology used, but too many to go into in detail, in a short blog article such as this.
Still confused and need more guidance? Contact us and ask for our test automation experts to take you through all the differences in detail.