The magazine cited Modi's unconventional announcement on Twitter of his visit to Pakistan last year while naming him among 'The 30 Most Influential People on the Internet' for the second year in a row in this year's unranked list.
The list includes US presidential hopeful Donald Trump, reality TV star Kim Kardashian and her husband Kayne West, author J K Rowling, former Olympic athlete Caitlyn Jenner and soccer star Cristiano Ronaldo.
For its second annual roundup of the most influential people on the Internet, TIME said it looked at the contenders' global impact on social media and their overall ability to drive news.
On Modi, Time said the leader of the world's largest democracy is also an "Internet star", boasting more than 18 million Twitter followers and over 32 million Facebook likes.
It also cited Modi's use of social media to break news and conduct diplomacy.
"And unlike some of his contemporaries, he often uses social media to break news and conduct diplomacy. On Christmas Day, for example, Modi tweeted that he would visit the Pakistani city of Lahore to wish Nawaz Sharif, the leader of India's chief regional rival, a happy 66th birthday," it said.
TIME, however, also cited the faux pas Modi made when he took to Twitter last month to convey his birthday wish to Afghanistan President Ashraf Ghani, who politely corrected him that his birthday was in May.
"That tweet made headlines for the wrong reasons, though: the Afghan President replied with his thanks, and a polite note that he was actually born on May 19," the magazine said.
Last year, Modi was named by TIME among the 100 most influential people in the world in its annual list, with US President Barack Obama penning a flattering profile of him.
This year's list also includes Indo-Canadian vlogger Lilly Singh, who TIME said is rapidly becoming one of the biggest stars on YouTube, both on and off-screen.
On Trump, the magazine noted that he is "redefining how political candidates use social media, for better and for worse".
Despite facing flak for his often insulting tweets and comments online, Trump has almost 7 million followers on Twitter, more than any other presidential candidate including Hillary Clinton, it said.