Thanks for the information ! We had a final discussion today where we conclude to start with nodebb simply because our main app is also on nodejs stack which will make future customization easier.
Indeed, UserVoice / IdeaScale and so on are (roughly saying)basically at the end forum with some plugin for voting etc. I'm convinced that if nodeBB has that kind of features, user base will grow really fast. I already know some companies looking for that kind of program but the main problem is that pricing is always based per user which make cost horrible high if you want to open it to global world
Do you have any links/info regarding the questions and answer plugin ?