No! Definitely not. Post Cafe has you covered when it comes to publishing quality content and making you seem like a guru when it comes to being an industry authority, but having a strong Facebook, Twitter and LinkedIn presence is more than just content.
You still need to be YOU on your social media accounts. No third party can do that. Post about what is happening in your business, your people, clients, and fun community stuff. You provide the spice to your page, while Post Cafe serves up the meat and potatoes.