Whatsapp is a product of Meta and files would still pass their proprietary servers. Let alone the metadata they collect. I refuse to use Facebook related products on principle. (Mostly stopped using google and microsoft products also)

Singal can do actual p2p userdevice to userdevice. Only if thats not possible it will use temporary servers for storage. But i am actually against that, id prefer if the file would not send until a p2p connection is established.

On paper the encryption of whatsapp is about as secure as Signal but can we trust Facebook to not implement a backdoor?. There open source llm-ai (llama) is by far the most intelligent model for its size. I plore people to ask what data Meta used to archive that result.