Purewire, Inc., a SaaS-based secure web gateway vendor, announced the launch of TweetGrade. TweetGrade provides a quantitative assessment of a user’s reach and influence in the Twitter community, and it helps people understand a user’s online reputation, legitimacy and safety. TweetGrade evaluates Twitter users based on their interactions on Twitter. The analysis is centered on a variety of inputs such as frequency and content of tweets, number of followers, number of those following, and activity level. Users receive a simple letter grade that ranges from an 'A+' to an 'F' to verify their reputation on Twitter and are able to share their TweetGrade with the Twitter community with a simple push of a button.