Topsy.com was a real-time search engine for social posts and socially shared content, primarily on Twitter and Google Plus. The service ranked results using a proprietary social influence algorithm that measured social media authors on how much others supported what they were saying. The service also provided access to metrics for any term mentioned on Twitter via its free analytic service at analytics.topsy.com, where users could compare up to three terms for content in the past hour, day, week or month. It was announced in September 2013 that Topsy would include every public tweet ever published on Twitter for search and analysis.
