Zendesk's products interface with one another when you need to use them simultaneously can be incredibly problematic. As a result, you may experience the unpleasant impression that Zendesk's design is a little antiquated and cluttered after using it for more than a few hours, especially if you use it directly after Intercom. This is especially true regarding the chat widget and its customization.  In-app messages and email marketing capabilities are the two crucial features Zendesk lacks compared to Intercom. Contrarily, Intercom lacks several ticketing features that are crucial for large businesses with heavy customer care workloads.  They both offer excellent and simple user onboarding as well as customer assistance at the same time. In addition, both are remarkably dependable and stable.