Wiki pricing survey
As I mentioned in the last post, SocialText has just lowered it's pricing. I thought I would do a little research and see how the other wiki vendors' pricing compares.
Confluence, at their least advantageous price point (a twenty-five user license), is $4/mo/user — assuming you have twenty-five users. But that's their cheapest license: if you only have five users in your company instead of twenty-five, then you pay $20/mo/user. And Confluence is host-it-yourself software. So it's not exactly apples to apples.
Xwiki is opensource, so you can use it for free on your own servers. They offer a hosting service: free with advertising or €2.4/mo/user at the least advantageous per-user pricing. (I'm not totally sure I'm interpreting this correctly. Ludovic, please correct me if I'm wrong.)
Project Forum has a "regular license," based on workspaces, and an "enterprise license," based on number of users. Their enterprise licensing starts at $0.56/user/mo. This is also host-it-yourself software.
JotSpot is still in beta, so we don't know what their pricing model is going to be yet.
Is that it? Are there any commercial wiki vendors that I'm missing?