I'm on the hunt for an effective, startup friendly, help desk documentation platform.
This would be the documentation platform that internal help desk resources use as a reference to try and address customer inquiries.
Ideally the platform integrates nicely with Zen Desk.
The leading players are Zendesk, GrooveHQ, and FreshDesk. I have used all of these and my vote goes to Zendesk.
I talked about it as a case study for a documentation task, see http://www.vinishgarg.com/2014/09/kb-case-study-pain-points-and-analysis/. I am also co-founder of @In23Hours where we develop product KBs in Zendesk.
If you have any specific questions or doubts, setup a call and I can explain everything that you may need to know.
Take a look at ZOHO (www.zoho.com). They have a loosely integrated suite of applications with built in communication. With their more enterprise level subscriptions, you get to customize and create what you find lacking in the base app.
I've been using them in my new business and very happy with them.