Born in Cassis, Séverine Grégoire studied in Marseille before being part of the Maison Méditerranéenne des Métiers de la Mode (MMMM) for a period of 4 years.
In 2006, with Chloé Ramade, she created the Ready-to-Wear e-commerce website Monshowroom.com, based in Carnoux-en-Provence. A reference in Person-to-Person e-commerce with more than 300 brands listed, Monshowroom raised €200k of new capital in 2007, and a further €4.3 million in 2009. The company has 30 employees and is one of the best Internet success stories of the Aix-Marseille-Provence Metropolis.
In 2012, the Casino Group, a major French and global retailer, purchased 49% of the shares, before becoming the 100% shareholder. Thomas Peyraut, previously responsible for the development of Cdiscount a product and service provider website, also a member of the Casino Group, has taken over the management of the women's ready-to-wear website.
Since 2015, Séverine Grégoire is a member of the Fly Group's strategy committee, and has created a new company MesDocteurs.com
In 2017 she joined the Board of the Maison Méditerranéenne des Métiers de la Mode.