Regarding encryption, some companies hold the encryption keys, but many, including Notesnook, use end-to-end encryption. This means the encryption happens on your device and the keys are generated from your password and stored locally rather than on the company's servers.

In that scenario the company never has access to the keys in the first place, so they wouldn’t be able to release them even if they wanted to.

Google Keep on the other hand does not use end-to-end encryption for your notes. While it does use encryption to protect data both during transmission and while stored on its servers, Google retains the ability to access the content of your notes. This means that although your data is safeguarded against external threats, Google's internal systems can still access your information.