Zendesk

Zendesk has defined the help desk category since its founding in Copenhagen in 2007. Now based in San Francisco and serving over 100,000 companies, it's the standard against which other support tools are measured.

The core is Zendesk Support—a ticketing system that consolidates customer conversations from email, web forms, chat, phone, and social media into a unified queue. Agents get a complete view of each customer's history, and the routing engine distributes tickets based on skills, availability, and priority.

Zendesk Chat (formerly Zopim) provides live chat with proactive messaging triggers. The Answer Bot uses machine learning to suggest knowledge base articles before customers reach an agent. For companies needing voice support, Zendesk Talk offers cloud call center functionality with IVR, call routing, and recording.

The Guide product handles knowledge bases—both customer-facing help centers and internal documentation for agents. The content editor is WYSIWYG, and articles support multiple languages. Community forums let customers help each other.

Enterprise features include custom roles, IP restrictions, sandbox environments, and advanced security certifications. The Explore product provides analytics across all channels with customizable dashboards.

Pricing starts at $19/agent/month for basic ticketing (Suite Team), scaling to $115/agent/month for Suite Professional with advanced features. Enterprise pricing requires a call. Add-ons like Talk and additional bot sessions cost extra.

The main criticism is complexity and cost. Zendesk's feature breadth means smaller teams can get lost in configuration options. The pricing also escalates as you add channels and features.