BurnChurn - 🔥 Reduce churn and track exit feedback for your SaaS
HTMLEmail.io - Responsive HTML email templates for startups & developers
YesInsights - Get Customer feedback with simple one-click or NPS surveys
Templates by Email Monster - Hundreds of free, responsive email templates. Pick and edit.
Reactful - Reactful is a real-time website optimization platform that triggers reactions to visitor intent to turn more ‘maybes’ into engaged prospects and customers.
MJML - The open source framework for responsive emails