HubSpot makes money mainly through subscriptions to its paid plans, which include Starter, Professional, and Enterprise tiers. While the CRM and basic tools are free, advanced features require a paid upgrade. HubSpot offers modular pricing, allowing customers to pay for specific Hubs like Marketing, Sales, or Service based on their needs. Additionally, HubSpot earns revenue from professional services like onboarding and consulting to help users get started and optimize their use of the platform.