Xfce screenshooter and clipboard manager

I moved from Xfce4 to i3 recently but I still use xfce4-screenshooter. It works properly and I had no problems with it except that I can't save to clipboard. On this page it is written: > **Copy to the clipboard** > The **Copy to the clipboard** option allows you to > paste the screenshot in another application, such as a word processor. > This option is only available when a clipboard manager is running. Althrough I didn't have clipman while I was using Xfce, I was able to use option *copy to clipboard*. I want to know what program (clipboard manager) should I run at the start of every i3 session.