The present paper tackles two major phenomena of today’s world – online migration and the need for sustainable behavior, both in a business-to-business approach. First of all, online presence is becoming indispensable for all businesses, considering that consumers have developed a first-online check-up for every need and potential purchase, even more, if we consider the outcome of the last two-years pandemic, where we consider the outcome of the last two-years pandemic direct contact is avoided. Thus, the need for online marketplaces, where supply and demand can be balanced, is becoming a paramount priority for all marketing and management specialists. Secondly, sustainability is the future; thus, every specialist must think of ways to implement such a judgment in their business model. One of these ways is transforming most processes to be tailor-made in the online environment. We have developed a concept for an online marketplace where specialists from marketing and management can offer their services as suppliers and find the needed services as clients. To develop a high-quality platform, we have first identified the specific needs of marketing and management specialists when dealing with research and consultancy. The present paper presents the results of two researches: qualitative research conducted among such specialists to identify what the new platform should offer and usability test market research to see if the online marketplace fits the specialists’ expectations. These are mandatory steps in every new product development; thus, we hope to be a proper example for future businesses.