Where can I learn if faxing beats free online tools?

Hey everyone, I’m working in a small company where we often send confidential documents, and lately, I’ve been wondering if sticking to faxing is old-fashioned or actually smart. I know there are plenty of free online services to share files, but I’ve also read stories about security breaches. So, is there a good place to read about how faxing compares to free digital tools today? I don’t want to stick to something outdated, but I also don’t want to risk our data. Any insights or resources you trust?