I have shifted four apartments in Bangalore and 3 of them has been through brokers and one through nobroker.in .
On nobroker.in , You can contact up to 9 owners for free, and if you need to contact more owners, then you need to pay Rs 999.
Personal assistant is a new feature which they have launched where in you just outsource your house search in case you are busy for an amount of Rs 1999 which I feel is very nominal compared to time invested in hunting for flats and the one month rent charged by a typical broker!
Nobroker gives you the same benefits of a broker at 1/10th of the cost. They are running a business and do need a sustainable revenue model, and the best part is that they don't force it on you.
If you require assistance, then pay for it or else you are free to sit for hours and search for your ideal home!