Christophe Fourtet co-founded Sigfox in 2010 with Ludovic Le Moan. The company was based at Labège, near Toulouse. Le Moan ran the business as CEO, while Fourtet worked as chief scientist and technical director.
Sigfox built a network for very small messages sent by low-power objects, a technology it called 0G. It raised roughly $300 million over its life from investors including Salesforce, Intel, Samsung, NTT, SK Telecom, Total and Air Liquide. In November 2016 it was valued at about €600 million.
Growth slowed after 2018, when the company admitted about 2.5 million real connections against the 7 to 10 million claimed earlier. Cellular NB-IoT, LTE-M and LoRa took market share. Le Moan stepped down in February 2021.
Sigfox entered receivership on 26 January 2022. On 21 April 2022 the Toulouse commercial court chose UnaBiz as buyer, at a price of about €25 million.