MJML: the only framework that makes responsive-email easy

An open source email campaign management tool for nonprofits

✉️ An awesome list of resources to build better emails.

The modern email development framework.

Fully functional Open Source email marketing manager for creating, sending, integrating, and analysing email campaigns and newsletters.

💌💨 Email Campaign Delivery built with GoLang inspired by GoHugo

Jigsaw-based PHP build system for rapid HTML email development with Tailwind CSS.

A native Go implementation of the MJML email framework, providing fast compilation of MJML markup to responsive HTML.

The utility belt for MJML developers

Official PHP wrapper for MailerLite Classic HTTP API v2

A rewrite of the original HTML email boilerplate (originally written by Sean Powell) that keeps up with the latest developments of email clients, providing a solid foundation for our email campaigns, and yours too!

✉️ An awesome list of resources for email marketing.

Mailness - self hosted email marketing platform

Collecto is an open source & self-hosted forms backend.

CLI tool for Maizzle.

Open Source Email Marketing Software (OSEMS)

Self-hosted professional email marketing & automation platform with email, SMS, workflows, CRM, analytics and AI integrations. Built with Laravel, Vue.js and Docker.

An unofficial port of MJML (by MailJet) to .NET Standard. This project is currently in an experimental state and should not be used in a production environment.

MailPilot: A Python library for streamlined email automation, enabling personalized mass mailing, SMTP management, and email marketing automation.

Complete CLI and MCP server for Smartlead — 270+ commands, reverse-engineered internal endpoints, and Claude Code skills. Built by GTM engineers, free for the community.