In truth, the protocols used by the companies may not be 100% proprietary But being commercial in nature the companies are secretive about how their servers op

In truth, the protocols used by the companies may not be 100% proprietary But being commercial in nature the companies are secretive about how their servers operate For example, its is easy to submit a blob to Github Gist servers, using any software the user chooses, including something as simple as a combination of small, open source UNIX utilities This is not the case for Signal or WhatsApp servers