He has collaborated with the satirical weekly “human resistance” publication Cuore and, together with the illustrator Roberto Grassilli went on to found and manage the Clarence web portal, which was subsequently sold to Spray and then passed on to Lycos and Dada. He collaborates with several magazines and directs Macchianera, a multi-author blog. He was a screenwriter for Magnolia’s series Camera Cafè. For the same company, he has led a creative laboratory for the creation of new formats. In May 2005, he appeared in the news for being the blogger who, with the simple copy and paste of a PDF, revealed the “omissis” in the official document issued by the United States following the investigation of the murder of the Italian agent Nicola Calipari. For Rizzoli, he published the novel “The Great Phone Directory of the Earth and Neighboring Planets (Jupiter not included)”. He has developed and hosted several shows for Rai Radio2.

An internet pioneer in Italy as well as a marketing, business strategy, and traffic acquisition expert. In 1995 he founded I.com, the first company in Italy to offer internet services differing from connectivity. In 1999 I.com was purchased by Icon Medialab AB. Tosi continued to run it for 11 years and became a reference point, in Milan and in Italy for digital agencies. In I.com, he forged the best professionals of the industry, and it is in this context that “Clarence” was founded, one of the most famous Italian portals.