Not well-known but quality is unmatched
SellerSprite is not as well-known in North America as its competitors are, however, they offer a significantly better product! Their sales estimates are very accurate compared to others and their comprehensive historical sales and review data has been the most useful part of the software for me. One of the driving factors that keeps me on SellerSprite is their continuous updates. There's always a new feature coming out. While there is a language barrier with support, they're also usually quick to help and my problem has been solved most of the time.