Multiple users have discovered that the Claude chat service on Slack is limited and only available to paid users. They expressed frustration, stating that the chat functionality is an essential part of both work and leisure. The company behind Claude has stated that this decision is aimed at providing higher quality services, with paid users continuing to enjoy privileges. While some users support the paid model for enabling more advanced features and higher levels of service, there are concerns it may create barriers to access. Free users can still experience the basic features of Claude on other platforms.