Smartphones and fashion are among the most popular purchases in India's fast-growing e-commerce market, which Deloitte expects to more than treble between 2017 and 2021 to $84 billion.
The South Korean tech giant in February launched its M-series phones in India, which are sold only through Samsung's website and Amazon.com's local unit.
That range of devices, priced between ₹7,990 ($114.23) and ₹17,990 ($257.20), has sold over 2 million units since launch and will help Samsung double its online sales, Asim Warsi, senior vice president of Samsung India, told Reuters in an interview.
"Business-to-consumer sales in the online market are expected to be $4.5 billion this year and, if that is so, we should be around 25% of the market," Warsi said.
Samsung is facing stiff competition in the world's second-biggest smartphone market, where it was once the clear leader, from rivals like China's Xiaomi Corp, which sells the bulk of its cheap, high-spec phones online.
Hong Kong-based tech researcher Counterpoint pegged Xiaomi's market share by shipments at 29% in the quarter to March, ahead of Samsung on 23%.
Samsung, which assembles all phones it sells in India locally, has fought back by reshuffling its smartphone portfolio, launching the M-series, which is only sold online, and an A-series that sells offline as well.
"All of these launches are keeping us in very good double-digit growth nick," Warsi said, adding Samsung would launch a new M-series phone in June priced around 20,000 rupees.
Samsung's total mobile phone sales in India touched ₹37,350 crore in the 12 months to end-March 2018, according to regulatory filings.