If referring to the enterprise customer service and messaging platform Intercom, the company does not offer a permanent free tier, though they frequently provide limited-time free trials for new business accounts to test out features like live chat, shared inboxes, and AI-powered customer support tools. For open-source or hardware-based building intercom systems, software controllers or mobile companion applications sometimes include free basic local use tiers, but professional hardware installations invariably require purchasing physical intercom stations and proprietary licenses.