What are some alternatives?
When comparing kWiki and ProProfs Knowledgebase, you can also consider the following products
HelpDocs - Educate your users with a super simple knowledge base that’s built for teams just like yours.
Document360 - Self-service knowledge base software focused on SaaS Products & Enterprise Software Projects.
ZenDesk - Zendesk is a beautiful, lightweight help-desk solution.
Acknow - Cloud-based knowledge management platform for SMBs
Freshdesk - Freshdesk is a cloud-based customer support software that lets you support customers through traditional channels like phone and email, social channels like Facebook and Twitter, and your own branded community
Helpie Knowledge Base Wiki Plugin - Helpie is the most advanced Knowledge Base plugin for WordPress.