Zuma's first tweet is a video of himself, in which he says: "Hello, everyone. I have decided to move with times to join this important area of conversation because I hear that many people are talking about me.
"I felt it is necessary that I should join in and be part of the conversation.
"It's me, the former president, Jacob Zuma," he announces in the 45-second clip.
At the time of publishing, that had been Zuma's only tweet.
Former government communications head Mzwanele Manyi, who infamously bought the now defunct Gupta media empire, was quick to announce the news on Twitter.