"Together we will script a glorious future for India... As we devote ourselves to take India's development journey to newer heights, we seek your support, blessings and active participation," Modi said in his first message on the official website.
He also said " Let us together dream of a strong, developed and inclusive India that actively engages with the global community to strengthen the cause of world peace and development."
A short profile was also uploaded on www.Pmindia.Nic.In which described him as "dynamic, dedicated and determined" leader who "arrives as a ray of hope in the lives of a billion Indians".
It said his "laser focus on development and his proven ability" to deliver results have made him one of India's most popular leaders.
Without naming RSS, it said that from a very young age, Modi immersed himself in service to the nation, working with "patriotic organisations".
Underlining that the website was a very important medium of direct communication between him and people, he said "I am a firm believer in the power of technology and social media to communicate with people across the world".
Modi hoped the platform creates opportunities to listen, learn and share one's views.
"Through this website, you will also get all the latest information about my speeches, schedules, foreign visits and lot more. I will also keep informing you about innovative initiatives undertaken by the Government of India," he said.