

Signal is lacking a certain feature “Archiving messages” . This company used Signal’s open source code to add this feature and offer the whole thing as a “Signal plus” product.
Assuming best intentions, Waltz wanted Signal but also wanted the ability to archive messages so he opted for the software provided by this company instead of the original.
My understanding is that Archiving chats would be keeping a copy of these chats accessible elsewhere for archiving purposes and not directly related to the archiving feature you’ve mentioned.
Signal does support chat backup which is close enough but its encrypted and its complicated to make one (for security reasons) and I am not sure its possible to view the encrypted chats without going through the process of restoring the backup.