ServiceNow sells a cloud platform that digitizes the internal workflows of large organizations, from IT tickets and employee onboarding to customer service and security operations. What began as help desk software became a layer that sits across the whole enterprise, which is why renewal rates run near the best in software. Customers expand seat counts and modules over time, and AI agents that resolve requests automatically extend the pitch. Founded in 2004, ServiceNow is among the largest pure subscription software companies anywhere.