Choosing a product is about the whole package, not just one-off features.
We use markup language, not wysiwyg. With cctext editor, you can format your text with simple and easy-to-write codes. So the topic can be edited only with keyboard, which improves editing speed, and enables you faster experience.
Word-like toolbar for beginners and users who don't like to use codes. The toolbar includes all functions. Writing with toolbar is just the same as keyboard operation.
Although cctext is not wysiwyg, it provides a real-time preview. You can see what the page looks like when you edit it.
Each section can be edited separately. No need to edit the full page every time. It saves time and improves efficiency.
It keeps the records of any change made to your workspace. Who changed what can all be seen. All revision histories can be tracked and picked up for the further editing.
User-generated tags and templates help to organize topics. It is much easier and faster to find what you need, and edit other topics with the same format.

When editing a topic, if needed, you can upload a file into the topic as an attachment. Others can download it or just view the content in the page.
A quick look for uploaded files like Mac OS X. You can view the content and get the idea without downloading the files every time. It makes content sharing faster and easier.

Upload a audio or video file, you will have a media box on your page, which you can play without downloading it or opening a new page.

The data will be hosted in Amazon S3 and EC2, which is safe and unlimited. And SSL certificate ensures the data secure and confidential. It won't be seen by others from the Internet.
Workspace-level access control enables workspace owner and admin to manage members for each workspace. It improves working efficiency to divide people into different workspace as needed. And it also certainly protects enterprise privacy.
The data will be backed up nightly everyday in case of any emergency. We can perform full backup recovery in the event of a system-wide emergency.
No installation required. You can use cctext just with your browser. Full keyboard operation and toolbar support help you to use it easily and quickly. No technical background or any special skills required. Everyone can use cctext.
If you are Google Apps user, you don't to sign up. You can log in just with you Google Apps account. And other Google Apps users in your company will be automatically added to your cloud once he log in.

The cctext uses WYSIWYM (what you see is what you mean), not WYSIWYG (what you see is what you get). That's a very important difference from some other wikis, like CentralDesktop and PBWorks.
That is because cctext is designed for enterprise internal collaboration and communication. Unlike CentralDesktop and PBWorks, we focus on the content, rather than the format. And this markup editor responds faster than WYSIWYG, which enables users faster experience. Maybe you also find that without any markup, your topic goes fluently too.
Besides, cctext also provides a word-like toolbar and the real-time preview. You don't have to remember the markup symbols. All editing functions can be accomplished with the toolbar. It will help you to change part or whole format. While editing/formatting the whole page or a section, you can all see the real-time preview below the editor. If you are still accustomed to the WYSIWYG editors, you'll like it.
We believed that a WYSIWYG editor is not so necessary for a collaborative wiki. And a WYSIWYM editor is clean and enough, and more powerful on optimizing the collaboration and improving working efficiency, especially when comparing two revisions and searching them in hundreds of topics.
So we choose the WYSIWYM side.