There are competitors. Maybe not visible ones, but the agency that is helping us with Primpy project, has a project exactly what this project does + extra features (they are located in Dubai).
But can we say that they're their competitors if we can't see them?
I was skeptic at the beginning and wasn't sure how they were running things but they do upvoting in a very precise and professional way. I bought the biggest package and I can say confidently that they do their job very honestly and professionally.