Yes, Cayzu help desk allows you to create both public and private articles.  Public articles would be accessible to your customers via your end user customer portal (ie - yourcompanysupport.cayzu.com) and private articles would only be accessible to agents via search in their help desk portal.    

The nice thing about private articles is that they are automatically indexed upon creation and are displayed in search results along side public articles, contact, tickets and ticket replies.  This makes it easy for agents to find answers quickly from one console.  

Need help creating a private or public article? Click here

Want more information on Cayzu Helpdesk, visit: https://www.cayzu.com