1 million Twitter users

On January 6, 2008, I predicted that Twitter would reach 1 million public uers before April 1, 2008. Twitdir reports the number of public Twitter users it has detected. Around mid February it seemed that the Twitter user base was growing faster than I expected. In the beginning of March however the growth slowed down. This reduced growth has continued until now, see the graph below.

If this reduced growth continues at the same speed, the 1 million mark of public Twitter users according to Twitdir will be reached only around June 2008. There is no explanation why the growth of the Twitter user base suddenly changed from 3,500 new users per day to 750 new users per day.

As mentioned in one of the previous posts on this blog, the number of private Twitter users could be around 15%. This implies that the total number of Twitter accounts at this very moment already exceeds 1 million.