Combine messaging apps

Hey there, new guy in town. Thought I would pop my head in and ask if anyone knows of an app that combines messaging services into one?

Example:

My main messaging apps are the default iOS messages app, Whatsapp and Facebook Messenger. Anyone who I need to talk to can be reached via those apps. However, I find that having 3 separate apps just to message various people can be kind of tedious.

My question is this...is there an app or service that combines all of these messaging services into ONE app so that I can message everyone I want from one app vs. multiple apps