A method and system for contextual messaging as utilized for decision support is disclosed. According to one embodiment, a computer-implemented method, comprises receiving and storing information from an administrative client that establishes memberships of a plurality of clients to a common contextual messaging system. Nomenclature information is received from the administrative client that establishes a nomenclature for the common contextual messaging system. A first client of the plurality of clients is permitted to accessing a contextual messaging host server via a web browser associated with the first client. A message is received from the first client. A message context is determined for the message using the nomenclature information. Messages are clustered based on the message context in a message database.