BeeFree.io - Bee is MailUp's drag-&-drop editor for responsive design emails.

Postcards - Create, edit and manage awesome email newsletters 😻

Emailgic - Emailgic is an AI-powered HTML email builder. Simply input your content, and it automatically designs the layout, colors, typography, and images, delivering a responsive HTML email in seconds—compatible with all major email clients.

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.

MJML - The open source framework for responsive emails

Topol.io - Create professional Email templates easily - Drag & Drop Email Builder.