Both Twitter and Line have seen big slowdowns in their user numbers.
The micro-blogging site Twitter now has 307 million monthly active users, an increase of just 3 million users on the previous quarter. This amounts to a year-on-year increase of just 8%, down from 12% the previous quarter.
Most of its growth was from foreign markets, with user numbers in the US remaining largely stagnant.
The Asian social messaging app Line also saw sluggish growth, with 212 million monthly active users, an increase of just 10 million in the last 6 months. In contrast, rival WhatsApp gained 100 million new users in the same time period.
Line also saw an increase in the proportion of users from its four core markets of Japan, Indonesia, Thailand and Taiwan, meaning that it is failing to attract users from new emerging smartphone powerhouses such as India and Brazil.