Signal is almost the only thing that I strongly trust.

Originally set it up to discuss patent stuff which had to be kept pretty secret, stayed for the lolz.

For small but sensitive items of data, such as bank details, I split over a couple of channels, eg SMS and email, to make it harder for any one bad actor to see all parts.

Google Drive.

Bitwarden Send or https://1ty.me/ or similar services. Bitwarden Send can do text or files, which is nice.

For actually sending, Signal disappearing messages or phone calls for some info.

nginx with a simple auth username/password is what I use for non technical people. For some of my lawyers I managed to get them to use SFTP with WinSCP so we could send things back and forth for edits. Using nginx I keep files off commercial leaky spying AI infected platforms that make pinky-promise lies.

password-protect PDF and then email ftw

Take a look at Psono. You can share any secret stored there with a link. https://doc.psono.com/user/basic/sharing.html#with-externals...

Try Psono. You can share any secret via a link https://doc.psono.com/user/basic/sharing.html#with-externals...

You could eather host it yourself or use e.g. https://psono.pw, a free hosted instance of Psono. In regards of trust. Psono is audited every year and the company behind it is ISO27001 certified.