What is the difference between HubSpot Starter, Professional, and Enterprise?

HubSpot Starter ($20+/month) unlocks basic email sequences, ad management, and removes HubSpot branding. Professional ($890–1,600/month) adds marketing automation, custom reporting, and workflows — this is where HubSpot becomes a full marketing platform. Enterprise ($3,600+/month) adds advanced features like custom objects, predictive lead scoring, and SSO. Most SMBs should evaluate whether Professional's automation justifies the significant price jump from Starter.