Solume.io gathers data from a diverse set of resources (currently twitter and reddit but more are coming soon - including bitcointalk) and classifies this data to coin, ICOs, and exchanges. We worked hart to train the algorithm to understand when a certain post or tweet relates to a certain coin or not, and we work to continue it's improvement.
The sentiment analysis is an algorithm we trained to classify positive or negative talk according to various indicating features.
Once the data is classified we visualize it.