Reviewers see Zendesk as a dependable, widely used support tool that is easy to set up, works well for ticketing, and can be useful for knowledge bases, team collaboration, and tracking customer issues. But the sharper theme is stagnation: several users call the UX old, the systems siloed, and core tasks like search, macros, analytics, and reporting frustrating or limited. Some also mention slow support and weak native integrations. Overall, people find it practical and reliable, but often dated, complex for startups, and slow to improve.