When comparing unobtainium vs Lean FT, the Slant community recommends Lean FT for most people. In the question“What are the best test automation tools for web apps?” Lean FT is ranked 20th while unobtainium is ranked 21st. The most important reason people chose Lean FT is:
It's very easy to go between UFT and LeanFT. Whoever is used with UFT can easily become very productive with LeanFT too, but with the added benefit of moving the testing closer to the development cycle.
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Pros
Pro Extensible
Custom drivers for e.g. API testing or static HTML testing exist and are easily built. Driver modules allow you to extend the main driver (e.g. Selenium or Appium) with ease.
Pro Platform agnostic because it is configuration driven
For test suites crossing multiple platforms, selecting the test target platform can be driven entirely by configuration.
Pro Seamlessly automate mobile and desktop browsers
Based on either Appium or Selenium, the API remains largely the same when switching between different platforms.
Pro It helps move testing closer to the development cycle
It's very easy to go between UFT and LeanFT. Whoever is used with UFT can easily become very productive with LeanFT too, but with the added benefit of moving the testing closer to the development cycle.
Cons
Con May have some stability issues
Since it's still a (relatively) new product, it may very well have some stability issues, which are sure to be fixed in the future though.