Twitter as a communications platform is gaining attention in Brazil both form individuals and companies due to the reduction of organic posts reach in other social platforms like Facebook. This work tried, through an experiment, to begin a process of systematic verification of organic reach of messages posted on Twitter. The experiment was carried out in January 2018 and the results show that only a fraction of messages posted on the platform are viewed by the potential audience (followers) of the profiles. This indicates the possible algorithmic intervention in the reach of messages posted on the platform. The results allow a revision of this platform to be proposed as an environment of effective participation and empowerment of users in the publication and sharing of messages, and especially news.