MailerLite

MailerLite's AI Writer integrates OpenAI's GPT to generate email body text, headlines, and subject lines from brief prompts. You can specify tone and context, and the tool produces multiple variations so you can pick the best fit. It's available in the drag-and-drop editor and in text blocks, making it easy to iterate on copy without switching tools.

This fits mid-market marketing teams who want to speed up production without outsourcing. It's particularly useful for seasonal campaigns or testing different messaging angles quickly.