CAMBRIDGE, MA--(Marketwire) - HubSpot released its June 2009 State of the Twittersphere (http://bit.ly/SOTblog0609) (Twitter hashtag: #SOTwitter) report, analyzing data from more than 4.5 million Twitter accounts over a nine month period to measure Twitter growth and report statistics on tweets, the Twitter user base and user geography. The study finds that despite obvious growth in the number of Twitter accounts, over nine percent of Twitter users are inactive.

While the Wall Street Journal reports that the number of Twitter accounts has grown to 32.1 million from 1.6 million a year ago, the HubSpot State of the Twittersphere study reports low activity levels for a significant number of users. Specifically, 55.5% of users are not following anyone, 54.9% have never tweeted and 52.71% have no followers.

This is HubSpot's second State of the Twittersphere report and is based on data gathered from Twitter Grader, one of HubSpot's free marketing tools that measures the power and authority of Twitter accounts based on factors such as number of followers, reach and frequency of updates. The study uses data from the past nine months on a pool of over 4.5 million users who have evaluated their accounts using Twitter Grader.

"Recently, there has been a lot of buzz from mainstream media about the growth of Twitter," said Brian Halligan, CEO and co-founder of HubSpot. "However, the June 2009 State of the Twittersphere points out that people may not be using Twitter to its full potential. If new users aren't really engaged, should it really be considered growth?"

Download the new June 2009 State of the Twittersphere report at http://bit.ly/sotwitter.

HubSpot encourages feedback and comments about #SOTwitter on the HubSpot Inbound Internet Marketing Blog at http://bit.ly/SOTblog0609.

Find HubSpot's first, Q4 2008 State of the Twittersphere report at http://blog.hubspot.com/blog/tabid/6307/bid/4439/State-of-the-Twittersphere-Q4-2008-Report.aspx.

About the State of the Twittersphere

The State of the Twittersphere is a regularly updated study about Twitter to communicate significant findings about Twitter growth and statistics about tweets, the Twitter user base and user geography. The study reports on data gathered from Twitter Grader, a free, online diagnostic tool that measures the power and authority of Twitter accounts. The State of the Twittersphere is compiled by HubSpot, Inc.

About HubSpot

HubSpot, Inc. provides Internet marketing software that helps businesses get found online, generate more inbound leads and convert a higher percentage of those leads into paying customers. HubSpot's software platform includes tools that allow professional marketers and small business owners to manage search engine optimization, blogging and social media, as well as landing pages, lead intelligence and marketing analytics. Based in Cambridge, MA, HubSpot can be found at http://www.hubspot.com. HubSpot's free marketing tools can be found at http://grader.com.