Codecademy, Mimo, Enki. I'm not going to act like I know a lot about other options, and you do say that fata hits on more advanced topics which these may not.
I do think you have a cool niche here that isn't being covered, maybe your landing page should include more information about the Duolingo-esque features? I just know that pulls me in a lot.
I do think you have a cool niche here that isn't being covered, maybe your landing page should include more information about the Duolingo-esque features? I just know that pulls me in a lot.