When comparing FogBugz vs Kwok Information Server, the Slant community recommends FogBugz for most people. In the question“What are the best bug/issue tracking tools for small development teams?” FogBugz is ranked 7th while Kwok Information Server is ranked 9th. The most important reason people chose FogBugz is:
EBS produces ship date probability distributions, see [here](http://help.fogcreek.com/7676/evidence-based-scheduling-ebs).
Ranked in these QuestionsQuestion Ranking
Pro Evidence-Based Scheduling
EBS produces ship date probability distributions, see here.
Pro Backed by big company
The same company behind Stack Overflow and Trello.
Pro Intuitive UI
The UI is very well thought through. All the right stuff is in the right places.
Pro Web based
No client software needed.
Pro Positive reviews
Positive reviews on SourceForge.
Pro Win, Mac, Linux
Con Cannot be used without an account
You cannot show someone a ticket that does not have an account.
Might be too limited for advanced users, there seems to be no integration with version control systems like GIT or SVN.