What is the difference between HubSpot Marketing Hub and Mailchimp?

Mailchimp is primarily an email marketing tool — straightforward, affordable, and excellent for email campaigns and basic automations. HubSpot Marketing Hub is a full marketing platform that adds landing pages, forms, ad management, social publishing, and deep CRM integration. If you only need email marketing, Mailchimp is simpler and cheaper. If you want to tie marketing activity directly to CRM data and revenue attribution, HubSpot is worth the premium.