research – How to analyse results for an open ended question?

I asked an open-ended question in a survey about one of our app’s features (That is somewhat similar to its search feature) to find out why users would use this instead of search. I’ve got a large number of responses (1000+).

My question is what’s a good approach to analyzing the responses and derive insights without having to go through each response. Right now I’m searching for the most frequently used keywords and grouping them. is there another more effective way?