Copytesting - Improve your website copy based on data from your audience
Email Kick - Email designer and analytics for your transactional emails.
Headlime - Create headlines like copywriting experts
Really Good Emails - A large collection of good product email design.
HTMLEmail.io - Responsive HTML email templates for startups & developers
Stripo - Stripo is an all-in-one email design platform. We enable our clients to build emails of any complexity, including interactive AMP emails, really fast and easy.