It is a mix of several national and region-specific carriers who offer a mix of same day delivery and 1 day delivery service options in different geographies. Certain carriers have a strong foot hold in some location and rely on local partners in other.
It is very difficult for individual brands to navigate through this, that is where a solution provider like Shipyaari can be extremely helpful. We store your inventory across our wide range of fulfilment facilities and facilitate the same day deliveries, providing end to end support.