Email Marketing GitHub Repositories (2026) · Open Source Tools

The largest open-source B2B cold outreach and email warmup service.

High performance, self-hosted, newsletter and mailing list manager with a modern dashboard. Single binary app.

Newsletters where you pay for the emails you send, not for dormant subscribers, at a fraction of the price of beehiiv and the like. Open source: self-host it, or use mailcheap.ai.

CRM and Task management software, Email marketing and many more. Django CRM software app is built for individual use by businesses of any size or freelancers and is designed to provide easy customization and quick development. ✨

The modern email development framework.

120 marketing skills as an AI marketing staff — plugin, portable skills, or an 8-bot team across 7 disciplines (narrative, SEO/GEO, social, email, paid, influencer, launch) on one contract, with 8 auditor gates: TALE · CORE-EEAT · CITE · ECHO · SEND · ROAS · STAR · RAMP.

EspoCRM – Open Source CRM Application

Marketing skills for Claude Code and AI agents. CRO, copywriting, SEO, analytics, and growth engineering.

The open-source email platform — self-host on your own AWS SES, or use the cloud. Resend-compatible API.

Open-source email API for applications and AI agents. Managed hosting at e2a.dev, or self-host with Docker.