Founded in Paris by Marco Tinelli in 1998 under the name Grey Interactive, over the past 15 years the digital agency has become an integrated communications group composed of 20 agencies around Europe and in 8 different countries (France, Spain, Portugal, Italy, United Kingdom, Germany, U.S. and China).

In September 2015, FullSIX was acquired by Havas Group in a transaction worth $75 Million.

[2][3] Prior to joining Havas Group - FullSIX was the largest independent Digital Marketing agency in France.

In 2010, FullSIX Group was elected Agency of the Year 2010 in Portugal,[8] and independent communications group of the year" in France in 2009.

[9] Sample campaigns of 2010: FullSIX group