MUMBAI

In India's sprawling financial hub of Mumbai armies of "dabbawalas" have for decades crisscrossed the city by foot and bicycle, delivering home-cooked food to office workers who are keen to avoid the searing heat and traffic-snarled streets.

Now, across the country, young entrepreneurs are taking that tradition to the next level with the explosion of shopping apps that allow customers to get hold of not only food and drink but anything else from clothes to iPhones within minutes.

The so-called quick commerce apps are redefining the retail game, not only disrupting e-commerce titans such as Amazon with their speed and efficiency but also long-established "mom and pop" stores which are no longer convenient enough.

At a warehouse managed by online grocer BigBasket in central Mumbai, employees work with military-like precision to pull off deliveries in just 10 minutes.

These warehouses are known within the industry as "dark stores", a reference to being closed off to customers.

When a new order is received, a worker leaps into action, darting through aisles filled with everything from fizzy drinks to vegetables, packing a bag of groceries handed to a motorbike rider, the modern-day "dabbawala", Hindi for "lunchbox man."

Local tech companies have poured in billions to set up these nifty logistical networks across big cities, fuelling India's rapid shopping industry.

For millions of customers, it's an easy way to avoid shopping in the sweltering heat, visiting multiple food stalls, and spending hours navigating the country's notorious traffic jams.

Growth has been "very strong", BigBasket co-founder Vipul Parekh told AFP, pointing to forecasts that indicate a compounded annual growth rate of more than 60 percent over the next two to three years.

"When you talk of a large industry transforming and growing at this pace, that is unprecedented," he said.

Delivery apps such as Getir or Jokr have faltered in Europe and the United States in recent years, as pandemic-induced demand wore off and rising inflation pinched customer wallets.

But sales in India have soared from $100 million in 2020 to an estimated $6 billion in 2024, according to projections by market analysis firm Datum Intelligence.

This could hit $40 billion by the end of the decade, according to investment bank JM Financial.

Companies say India's quick commerce's growth is partly down to the sheer scale of people living in tight-packed cities within a roughly two kilometer radius of a "dark store," said Parekh.

"The revenue potential in that catchment is very high," he said.

A lack of many traditional supermarket grocery chains in India aid the business model, he said.

Local players have made rapid progress but competition is heating up.

Amazon is getting its act together, along with Walmart-owned Flipkart and billionaire Mukesh Ambani's Reliance Industries as they belatedly roll out rapid delivery offerings.

"One of the problems with e-commerce players like Amazon is that, until now, they've relied on these big fulfilment centres that sit on the outside or outskirts of cities," said Satish Meena of Datum Intelligence.

"These aren't suited for rapid delivery, which is why they now need to invest to build their own dark store networks within urban areas."