Signal and US based non profits are not ok. their gov can still access data and chatgpt used to be non profit now majorly owned by Microsoft and privately. Just find full European alternatives
Terms and conditions (even the whole structure - chatgpt is case example of non profit to private) can change the best way is to focus fully European. Also follow what the founders made before and if they sold prev companies to us based indivs. If European non profit etc even better