He is notable for his work for organisations like the OECD, the World Economic Forum, Skype, dpa, and Max Planck Research Society.

[1] Stefaner is a multiple winner of the Kantar Information is Beautiful awards.

[2] His data visualisation work has been exhibited at Venice Biennale of Architecture and Ars Electronica.

[5] One of Stefaner's most widely known works is the visualisation of the OECD Better Life Index.

[6] Among other notable projects is his interactive installation On Broadway,[7] his work for the FIFA,[8] and his design of the new OECD data portal.