Wikipedia
Vupen
Vupen Security was a French information security company founded in 2004 and based in Montpellier with a U.S. branch based in Annapolis, Maryland. Its specialty was in discovering zero-day vulnerabilities in software from major vendors in order to sell them to law enforcement and intelligence agencies which use them to achieve both defensive and offensive cyber-operations. Vupen ceased trading in 2015, and the founders created a new company Zerodium.