[achompas]

Their service is high-touch. Stylists speak with clients constantly, so they record this information.

They also have mobile apps, they run product experiments, they source and sell clothing and manage inventory, they build and iterate on algorithmic approaches to recommend and design clothing (many of which help stylists and never reach the screen of an external client).

You can skim through their Algorithms blog for some more detail. I find them impressive in how they scale the impact of relatively few stylists to about 3M users.

https://www.kleinerperkins.com/files/INTERNET_TRENDS_REPORT_...