Stefane Fermigier is a French tech entrepreneur and open source advocate. He is the founder and CEO of Abilian, a company which develops enterprise information management solutions based on open source software. Previously, he founded Nuxeo in 2000, a company which was sold in 2021 for $M150. A graduate of ENS Paris (now called ENS PSL), he holds a PhD in mathematics from Paris 7 University (now called University of Paris).

He has cofounded and led - as president/chairman, co-president/co-chairman or vice-president - several organisations dedicated to developing the open source ecosystem in France and Europe:

• EuroStack Project (2025)
• EUCLIDIA (2021)
• APELL (2020)
• The PyData Paris / PyParis conference (2014)
• CNLL (2010), the French National Council of Free / Open Source Companies.
• GTLL (2007), the business and innovation cluster for open source in the Paris Region (part of the Systematic Paris Region cluster).
• The Open World Forum / Paris Open Source Summit (2008), yearly conference dedicated to open source and "open everything" in Paris.
• EuroLinux (2000), a federation of European open source associations, that was formed to fight software patents between 2000 and 2005.
• AFUL (1998), the french-speaking Linux and free software users association.

He's also the founder or a cofounder of several open source projects, including:

• 2024: Hop3 (Python-based self-hosted cloud platform)
• 2021: NUA (Python and Docker based self-hosted cloud platform)
• 2016: Olapy (Python based business analytics)
• 2012: Abilian SBE (Python based social business platform)
• 2009: Apache Stanbol (content analysis)
• 2009: Apache Chemistry (CMIS implementation in several languages)
• 2007: Nuxeo EP (Java based ECM platform)
• 2002: Nuxeo CPS (Python based collaboration suite)