Actually, most aggregators that I've used (hotwire, priceline, etc) all include taxes and fees so I'm not sure what you're referring to here.
I think the purpose of Hipmunk (and what makes it different) is that it takes more things into account than price, right? You prioritize flights that have the most optimal times with the best price, am I correct? I found they were most similar when you selected price as your priority when looking flights.
If anything, a feature I think I'd enjoy would be a fare predictor because most aggregators to have this feature and it's nice to know when you should buy.
I think the purpose of Hipmunk (and what makes it different) is that it takes more things into account than price, right? You prioritize flights that have the most optimal times with the best price, am I correct? I found they were most similar when you selected price as your priority when looking flights.
If anything, a feature I think I'd enjoy would be a fare predictor because most aggregators to have this feature and it's nice to know when you should buy.