Real estate portals have instigated industry change, and also reflect it. The long-time portal king, Zillow Group, went all-in on iBuying, and now pursues a similar end-to-end goal through a different approach. CoStar Group, already a leader in commercial and rental portals, has gone all in on residential. While realtor.com and Redfin continue to evolve and adapt compelling consumer and agent offerings. This chapter provides an overview of where the nation’s leading portals are now and where they are heading.