Uber and Ola are available. At peak times waiting time from landing can be 45 mins from arriving at the gate. I have never tried the ride later option which could be OK, if sure when taxi is required. The Airport taxis are good (better than either of the above in my opinion). All of the above will cost about INR 800-900 including toll to the centre, possibly more when busy traffic. Waiting time for Airport taxis in my experience is less than with Uber and Ola.

Generally I am met by the company vehicle, but late at night I sometimes book a taxi inside airport. There are many choices, waiting time 2-3 mins (if one has no vehicles go to the next) and cost about INR 1,600 including toll to the centre.