Jérémie Peiro and Mickaël Froger registered Lengow in Nantes on 1 July 2009. The product let online shops push one catalogue to many marketplaces and price comparison sites without rebuilding it for each one.
The first money came in small amounts. Lengow raised €210,000 in April 2010 and €1.2 million in July 2011 with Alven Capital. In 2012 it won an E-Commerce Award International, and in 2013 it held its first Lengow Ecommerce Day.
In 2015 Lengow reshaped itself as an e-commerce automation platform and raised €10 million. It pushed into Asia in 2016. Marlin Equity Partners took a majority stake in 2021, and Lengow bought the pricing tool Netrivals in April 2022.
The recent results are mixed. Revenue was €16.7 million in 2023 with a net loss of €10.8 million, then €15.5 million in 2024 with a net profit of €1.77 million.