Hi Rajaraman,
Thanks for your question.
Actually, it’s not that hard. It can seem overwhelming, but when you get the feedback, it will probably make sense what you need to do afterward.
Low-practically I create a Google Sheet where I add the different answers and consense them to only a few words. Then I group them. This is basically my overview. Then I can quickly see that 10 customers would like us to develop e.g. an email platform, 15 customers would like a specific contact person in Sleeknote etc.
Besides this overview, I also add all the answers to a Google Doc and I assign colleagues/stakeholders to some of the answers when it’s relevant. E.g. if something is giving me input about our marketing effort, then I will assign our CMO. I know Google Sheet and Google Docs is pretty old school, but it works for me 
I hope this makes sense. Thanks again for your question 