It is quite difficult to say something for sure, but I am proud of crypt, because there are so many projects wich can solve real environmental issues
Projects that are going to work in this direction really a lot... But so far I have not seen any ready-made solutions. So that can be said that competitors until that there is no.
I have not seen ready made solutions, too. In turn, Greencoin is only on its first stage as well.. so I will be clear approximately in a year.