Under which licenses does Letters come? Ludwika Slowikowska September 08, 2021 09:45 Updated Follow Letters is distributed under commercial license. For details on the Letters commercial license please contact us. Related articles Where can I find the Letters pricing? How does one integrate Letters into their application? What is Letters? What is the technology behind Letters? Under which licenses do CKEditor 5 Collaboration Features come? Comments 0 comments Article is closed for comments.