Zendesk earns praise for powerful integrations, flexible workflows, and strong knowledge-base tooling, but reviewers cite an aging UI, clunky search, siloed modules, slow support responses, and premium pricing. Makers of highlight seamless environment integrations and data analysis. Makers of note customizable chat flows enabling founder messaging from their app. Makers of applaud startup-friendly pricing and trust-building. Overall: reliable, feature-rich, and widely adopted, yet heavier and costlier than some modern alternatives.