Here are a few popular content optimization tools widely used in email marketing:
Grammarly: A tool for checking grammar, spelling, and readability. Hemingway App: An app that helps make your writing clearer and more engaging. Phrasee: Uses AI to generate optimized email subject lines and content. Litmus: Provides email testing and analytics to help optimize email content and design. Sendinblue: Offers features for personalized content, A/B testing, and advanced analytics.