Image caption Top Indian business leaders attended the launch of Digital India week
Indian companies have pledged 4, 500 trillion rupees ($70bn; £44bn) to the "digital India" initiative.
Among key investors were the Ambani brothers, Tata group chief Cyrus Mistry and Wipro head Azim Premji.
Companies also pledged to manufacture in India, estimated to add 1.8 million jobs to the economy.
Prime Minister Narendra Modi launched "India Digital Week" on Wednesday, to reinvigorate an $18bn campaign to strengthen digital infrastructure.
"Why can't we make quality electronic goods that are globally competitive?" Mr Modi said, highlighting his goal of ending net technology and electronics imports by 2020.
India's richest man Mukesh Ambani pledged the biggest investment, saying he planned to invest 2.5tn rupees ($39bn) through his Reliance Industries.
Kumar Mangalam Birla, chairman of the conglomerate Aditya Birla Group, announced $7bn to fund network rollouts and other projects, the AFP news agency reported.