ChatGPT is the most widely used AI tool among email marketers. It generates email copy, creates campaign ideas, and produces multiple content variations for A/B testing. Email marketers typically use ChatGPT for brainstorming newsletter topics, writing promotional emails, and creating automated email sequences. Copy.ai specializes in email marketing templates with over 90 pre-built email formats. The platform generates subject lines, email bodies, and call-to-action copy optimized for different industries and campaign types.