How do you know that it’s time for you to launch your online marketplace? When do you see the necessity to provide the ultimate clear and fast “brand – consumer” communications? The point of an online marketplace is to grow customers loyalty by offering them an ever-expanding range of products. A brand, whether online or not, must use its reputation and expertise to make its marketplace successful. Let's take a look at the benefits of marketplaces and the reliability of Ruby on Rails as the strongest development tool.