Specific single courier is not the best courier all over india.
you would have to select the region wise couriers.
Like DTDC does not work good in banglore region, same like Bluedart does not work in north east.
So Select couriers according the reason.
Like all over north and North East india... Overnite Courier is Best (UP, Bihar, Assam, Kolkata, Haryana, Punjab, Rajasthan, Uttrakhand, Himachal Pradesh, Sikkim, Manipur etc)
Bluedart has good service all over india but it is much coslty so you can use DTDC.
But in South areas, The professional courier is best. It delivers two days late but in villages as well and your packet is safely kept by them. For late delivery, be in touch with customers to avoid negative account performance.
In MP, select the madhur courier which is best for towns and villages and In Gujrat, Select Tirupati Courier Serivice.
Otherwise DTDC and Overnite has good response all over india, Except South States.
Hopefully that will make your shipping helpful to customers.
Thank You.
