Market share and trends for top e-commerce platforms

E-commerce has been a very hot area for many years and we were lucky to be involved in different roles in e-commerce businesses. After the disappointment of the early years of our century, click-and-mortar visions have morphed into cross-channel and then omni-channel approaches focusing a lot on delivering a consistent experience to consumers across touchpoints throughout a wide variety of possible customer journeys. What is the market share of each of the top e-commerce platforms in different segments of e-commerce sizes? What are the trends? Which look like good entry-level options with potential to scale? Some answers in a summary of a bit of research in this post.
Quite clearly bridging the gap between offline and online commerce creates a set of new challenges and achieving a digital transition for commerce has similar complexity to rolling out e-business in other areas of the economy like banking, payment systems, direct stock trading or even media. At the same time, new opportunities arise for e-commerce start-ups that deliver innovation in terms of product or service sold, in terms of business model or in terms of service level. At the center of all these endeavors we have a core infrastructure which includes the e-commerce platform in a pivotal role between all functions required to run a trading or retail business, particularly when that business combines online and offline facets. So, we wanted to understand what market share top e-commerce platforms have and how they've evolved over the past couple of years; some of our conclusions in the presentation below: