Stream is described as 'Scalable & Fast API for building social networks, activity feeds, news feeds and activity streams. Aggregated feeds, ranked feeds, analytics and personalization all help you improve your app's engagement, retention and conversion' and is an app in the News & Books category. There are four alternatives to Stream for a variety of platforms, including Online / Web-based, PHP, Safari, SaaS and Windows. The best alternative is Pusher. It's not free, so if you're looking for a free alternative, you could try Arena Live Blog or Notific.io.