Throughout the first months of 2009, Twitter grew at a rapid pace, peaking at a growth rate of 13% in March 2009. According to the latest data from HubSpot, Twitter’s growth is slowing dramatically: in October 2009, Twitter’s growth rate had fallen to 3.5%.
Most of Twitter’s growth is currently happening internationally. According to HubSpot’s analysis of over 5 million Twitter accounts, 40% of the top 20 Twitter locations are now outside of North America. In July 2009, only 15% were from outside North America.