I work at Grist, the "tableur collaboratif" (collaborative spreadsheet) listed on the La Suite homepage. We're in the interesting situation of being both a NYC-based company, and open source software the French gov has adopted and is helping to develop. Grist is mostly a node backend. So it is a complicated story. The key is having code the gov can review and trust and run it on sovereign infrastructure.
Grist https://www.getgrist.com/
A write-up of how the French gov uses it https://interoperable-europe.ec.europa.eu/collection/open-so...