Is there an offline server for taking screenshots?

Question

Screenshots

Good day!
There is a very convenient screenshot service - joxi. Select the area you want to take a screenshot, draw arrows, comments and click "OK". A public link is generated to view the screenshot.
Its disadvantage is that all screenshots are stored on someone else's server. If the information is confidential, then you want it to be stored in trusted places.
Is there a software in which the screenshot server is placed on its own server and all information is stored only on it. Also interested in the presence of clients on Windows / Linux.

Answer 1

I use sharex
can store screenshots in dozens of places up to your personal ftp.

Answer 2

The simplest is Yandex.Disk, Dropbox. they have that functionality.
You can install Gyazo and configure it with your own php script