WebRankInfo is an information site on SEO created in 2002 by Olivier Duffez, SEO consultant. It publishes hundreds of background dossiers for the optimization of natural referencing and manages the forum where more than 250,000 members have participated since its creation.

He is also co-founder of Ranking Metrics, a company where he provides SEO training (thousands of professionals trained since 2006) as well as the development of the My Ranking Metrics platform (online tools for SEO optimization).