The most popular RSS Feedreader in October of 2007 was Google Reader in October of 2007. It had the most feeds being added to it during that month. It had 37.4% of all feeds added to a feed reader, according to AddThis.com.
Google keeps its crown for another month, continuing to grow its share. This growth looks to be due mostly to losses by Bloglines and NewsGator. Based on the year to date trend, Google continues to grow its market share.