Catharism
The Cathars thus had little competition.  The Cathar "Perfects", the so-called Good Men or Good Women, lived restrained lives and spread their faith in towns - where the Catholics in general did not have their best agents.  Also, Cathars preached that only these Good leaders had to follow the regimens their whole lives - lay people could repent only on their deathbeds.  Many 20th century Christian sects have similar beliefs.