Flipkart/Amazon and Udaan are the e-commerce platforms which provides the reqd. product to their different potential buyers. In order to understand the difference b/w these e-commerce giants, we need to understand about B2C business model and B2B business model.
°) FLIPKART / AMAZON
Flipkart / Amazon is an e-commerce giants which provides the packaged product to the people living in the different parts of the country i.e. ( people like us ). Their basic business model is working ‘ B2C ‘ .

******B2C BUSINESS MODEL******
i) B2C, the acronym for "business-to-consumer", is a business model based on transactions between a company, that sells products or services, and individual customers who are the end-users of these products.
ii) The coustomer of this type of model are the people like us living in the country
iii) The focus of this type of model is on providing the best product to the customer on the better price then the market with providing cashback on it.
iv) They make the relationship with retailers and customer
v) Their competition is with ' Snapdeal ' and ' Tata cliq ' etc.
°) UDAAN
Udaan is an e-commerce giants which provides the packaged product to the companies, manufacturers, wholesaler, and retailers . Their basic business model is working ‘ B2B ‘ .

******B2B BUSINESS MODEL******
i) Business to business also called B to B or B2B, is a form of transaction between businesses, such as one involving a manufacturer and wholesaler, or a wholesaler and a retailer.
ii) The coustomer of this type of model are the Companies
iii) The focus of this type of model is on providing the best product to thecompanies for the better Relationship.
iv) They make the relationship with Supplier – Manufacturer, Manufacturer – Wholesaler, Wholesaler – Retailer.
v) Their competition is with ' Indiamart ' and ' TradeKosh ' etc.
So,
There is very less scope in the e-commerce start-up market, as it requires a large amount of funding which is to be used on the potential customer by giving them more discounts and cashbacks.
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