Here is a link to a report featured on Seeking Alpha. https://seekingalpha.com/article/4253311-exp-disruptive-real-estate-brokerage-high-upside
If you don't have time to read the whole report about EXPI here is their summary:
eXp is a relatively new entrant to the real estate brokerage industry with a digitally-enabled cost leader strategy.
eXp passes on these cost savings to real estate agents, which is fueling rapid agent / revenue growth.
eXp appears to be undervalued relative to other stocks growing at similar rates, creating an opportunity for 80% upside over the next year.