Hi Anthony, How big is your organisation?
SharePoint 2013 and it's not a recommended solution for this. We've tried it and failed (the tool has huge gaps). Depending on what you aim to achieve a tool might be more useful than others. There's a really interesting comparative created by Lecko, it's free: http://referentiel.lecko.fr/
If you really aim to have an integrated approach across the whole organisation (an enterprise social network "ESN") you need indeed a project to set it up and then animate it on a single platform that can connect to your existing tools (email, calendar, online chat...) or your communities will be yet another silo.
Jeff Ross has written a well documented Playbook for ESNs