Free or Paid?

Yes, TinyMCE is an open source rich text editor (WYSIWYG) licensed under LGPL 2.1. This means that you can use the editor without needing to buy a commercial license. The company supporting the TinyMCE project (Tiny Technologies) has a number of paid options available, from premium plugins, to professional support, to commercial licenses for businesses where LGPL is not the right choice. It's these paid services that help support the ongoing development of TinyMCE. You can get TinyMCE here https://www.tiny.cloud/get-tiny/ and check out pricing https://www.tiny.cloud/pricing/