Sendune

Sendune is an open-source web app and server that provides tools for managing transactional and marketing emails. It functions as a web application and server designed to handle customer data, SMS capabilities, and workflow automation specifically through the use of AWS SES. The platform serves as a centralized hub for businesses to coordinate their customer communication strategies while maintaining control over their sending infrastructure.

The software focuses on the creation of email templates that are compatible with various email clients on both web and mobile platforms. It is deployed as a server-based application, though its designer component is available as an Angular library for integration into other projects. This flexibility allows users to either use the full platform or embed the email designer directly into their own existing internal tools or customer facing dashboards.

Key features

• Drag and drop visual designer for no-code email creation
• HTML code editor for custom templates and manual coding
• Plain text editor for minimalist transactional emails
• Direct HTML output compatible with any email service provider
• Support for cloud storage integrations like AWS S3 and Cloudflare R2
• Customizable UI theming via CSS variables
• Ability to create and save unlimited email templates

The architecture emphasizes simplicity to ensure high deliverability across different email clients. By avoiding intermediate code frameworks like MJML, the tool generates standard HTML that is less likely to break during rendering. It is intended for developers and marketers who require a lightweight system for designing emails. The system allows users to implement their own image upload logic to connect with preferred cloud storage providers, ensuring that assets are hosted on infrastructure the user controls.

Sendune is a minimalist tool for users who prioritize functional, fast, and open email template design over complex feature sets. It is built for those who prefer a democratic approach to email design where the resulting HTML can be exported and used across any provider.