From the March issue: As Airbnb has grown, so has the number of companies piggybacking on it and its rivals in the short-term rental market space. Firms like Keycafe, Pillow, AirDNA, Guesty and Happy Host are creating niches for themselves by offering marketing, cleaning, management and data analysis. These startups typically serve the most dedicated short-term hosts, but they have also marketed themselves to property investors, hotel research firms, global financial institutions, restaurants and, in at least one case, dog walkers. [more]