It is important for your ecommerce success to sell on multiple marketplaces. However; it is not easy if you have more than a handful of products. A SaaS service like http://uploadmyproducts.com can help you keep your sanity and still get a competitive advantage through selling on marketplaces in a controlled manner.
UMP – http://uploadmyproducts.com is a SaaS service that pulls inventory data from your ecommerce platform and pushes it to multiple marketplaces. UMP previously had successfully implemented Push or uploads to eBay, Amazon, Google Shopping and Shopping.com. It can now upload to Walmart.com also helping merchants give even more exposure to their products.