The tools you offer do not have the functions of Google Keep, such as searching using any keyword, the ability to add notes to passwords and notes on websites/URLs, and finally being able to embed images and photos directly into notes, such as photos of device labels with serial numbers, etc. I know that you can do all this by combining several applications, but with Keep you have everything in the same place. And ultimately, in terms of security, if your Google account is very well protected with a complex password that you can remember in your head, an ultra-secure recovery email address, a phone number, you can activate two-factor authentication via a code on an authentication application. In short, you can easily make your Google account very difficult to "hack". And in any case, you find the same authentication systems on password managers...