Which company was the first to launch a large-scale same-day delivery service for e-commerce orders in the United States, revolutionizing retail logistics?

The logistics of retail supply chains have been transformed by transportation innovations. One of the most significant developments in recent years has been the rise of same-day delivery services, which have fundamentally changed consumer expectations and forced retailers to reimagine their distribution networks. This question explores the pioneering company that first made same-day delivery a mainstream expectation in e-commerce.

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Amazon with Amazon Prime Now (2014)
Walmart with Express Delivery (2016)
Target with Shipt (2017)
eBay with eBay Now (2012, but limited to select cities and discontinued in 2015)