Tristan Louis is a French-born American author, entrepreneur and internet activist.

Boo.com was a short-lived British eCommerce business, founded in 1998 by Swedes Ernst Malmsten, Kajsa Leander and Patrik Hedelin, who were regarded as sophisticated Internet entrepreneurs in Europe by the investors because they had created an online bookstore named Bokus.com, the third largest book e-retailer, before founding boo.com.