ngDesk has a user-friendly interface and we are using it mostly for Customer Support but beside this ability there is an option for creating knowledge base and this is a great opportunity. The UI is easy to use and it has modern browser and great search functionality so we can easily find old tickets for specific customer, UI design can be customized the way we want. We are able to provide direct response for a ticket from email address, we are even able to put private notes for our internal team so we can better communicate with each other.
