That's kinda the whole point: the US is still the world's 1st power (a place France lost after losing the Waterloo battle, basically) and nobody has as much spying power as the US do (China probably come close).
A country with 1/10th the GDP of another country cannot be spying "just as much".
P.S: and let's not forget that France is exactly nowhere when it comes to tech, with the biggest players like Dassault and Thales being irrelevant tiny players compared to the american behemots. In the top 100 companies by market cap in the world the four french ones are... Hermes, Dior, LVMH, etc. I don't think these exactly help spying.
P.P.S: I can see I'm downvoted by french "cocorico" readers ; )
https://www.france24.com/en/20110104-france-industrial-espio...
Smaller countries tend to have massively outsided foreign espionage apparatus - see Japanese industrial espionage in the 1980’s, the French playing silly buggers globally, the Chinese basically boosting their entire economy off the back of intelligence collection, etc.
So while it is probable that the US has a bigger spying industry, it's also hasty to dismiss another player by saying "lol 10% of GDP"
> Hermes, Dior, LVMH, etc. I don't think these exactly help spying
Well France carried spying activities in Syria through Lafarge. Sometimes all you need is a foothold into the good places (Syria, or, for L'Oréal, rich circles)