Delhivery is acquiring rival logistics firm Ecom Express in an all-cash deal for Rs 1,407 crore.Ecom Express, which had a valuation of around Rs 7,000 crore less than a year ago, is being sold in a distress sale.Ecom Express faced challenges in sustainable profitability and lost its leadership after co-founder Krishnan passed away.The company had to shelve its IPO plans due to market uncertainty and has now been acquired by Delhivery.