Starting from version v38.0.0 onwards, all open source installations of CKEditor 5 display a small “Powered by CKEditor” logo in the bottom-right corner of the editing area. The label links directly to the CKEditor website. The new branding approach is designed to make sure the entire community knows who is powering and modernizing their rich text editor.
To remove the logo, you can obtain a commercial license and a license key for CKEditor. You can start by using the 14-day free trial.
Refer to the documentation for more details.