Robin is an RPA language, not a platform like the ones you mentioned.
So the scope differs.
You can create automation scripts and practically implement your own RDA solution by utilizing a series of other tools (C# program development for .exe creation and Windows’ Task Scheduler for scheduling/triggering).
I have already published a guide on how to call .robin scripts through a C# console application and have just finished a guide on how to utilize Task Scheduler to run your scripts (by utilizing the .exes for instance, that use your robin scripts internally).
I am putting some finishing touches and will publish it shortly.