Open-source email marketing and newsletter software in 2026
30 open-source projects, ranked by GitHub stars and how recently each was worked on. Listmonk leads with 24k stars, ahead of BillionMail. 20 had code pushed in the last three months. Most common licenses: MIT (16), AGPL-3.0 (10) and GPL-3.0 (2). Commercial email marketing and newsletter software are listed separately.
New this season
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1
MailCheap marclou
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.
Complete system Experimental A newsletter with many inactive subscribers wants to cut costs compared with beehiiv or Mailchimp.
★ 1.4k AGPL-3.0 JavaScript Active, pushed 9 days ago -
2
Thinkwithblack-skill backtrue
365 free AI marketing skills (zh-TW/en) for ChatGPT, Claude, Gemini, Claude Code & Cursor — copywriting, ads budget, margin, CRM, email. 365 個免費 AI 行銷 Skills
List, course or other material Experimental A Taiwanese or Chinese-speaking marketer wants a large set of ready prompts.
★ 249 MIT Python Active, pushed yesterday -
3
MillionSend MillionSend
The open-source email platform — self-host on your own AWS SES, or use the cloud. Resend-compatible API.
Complete system Experimental You use Resend's API but want to self-host on SES to cut costs.
★ 258 AGPL-3.0 TypeScript Active, pushed 6 days ago
All open-source email marketing and newsletter software, ranked
Complete systems you can adopt 15
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1
Listmonk knadh
High performance, self-hosted, newsletter and mailing list manager with a modern dashboard. Single binary app.
Complete system Production-ready You send newsletters to large lists and want to pay only for SMTP or SES instead of per-subscriber pricing.
★ 24k AGPL-3.0 Go Active, pushed yesterday -
2
BillionMail Billionmail
BillionMail gives you open-source MailServer, NewsLetter, Email Marketing — fully self-hosted, dev-friendly, and free from monthly fees. Join the discord: https://discord.gg/asfXzBUhZr
Complete system Usable You want to run your own mail server and campaigns together and know how to manage IP reputation.
★ 16k AGPL-3.0 Go Slowing, pushed 5 months ago -
3
Keila pentacent
Open Source Newsletter Tool.
Complete system Usable You want a simple self-hosted or EU-hosted alternative to Mailchimp for newsletters.
★ 2.3k AGPL-3.0 Elixir Active, pushed 2 days ago -
4
SendPortal mettle
Open-source self-hosted email marketing. Manage your own newsletters at a fraction of the cost.
Complete system Usable You want cheap newsletter sending on your own server and already use a transactional email provider.
★ 2.2k MIT PHP Active, pushed 11 days ago -
5
MailCheap marclou
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.
Complete system Experimental A newsletter with many inactive subscribers wants to cut costs compared with beehiiv or Mailchimp.
★ 1.4k AGPL-3.0 JavaScript Active, pushed 9 days ago -
6
Notifo notifo-io
Multi channel notification service for collaboration tools, e-commerce, news service and more.
Complete system Usable Your product needs user notifications across channels and you want a self-hostable service rather than building one.
★ 883 MIT C# Active, pushed 43 days ago -
7
Phplist3 phpList
Fully functional Open Source email marketing manager for creating, sending, integrating, and analysing email campaigns and newsletters.
Complete system Production-ready You want a proven self-hosted newsletter tool on ordinary PHP hosting.
★ 877 AGPL-3.0 PHP Active, pushed 14 days ago -
8
Django CRM DjangoCRM
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. ✨
Complete system Usable A small business with Python skills wants a CRM it can customise directly in Django admin.
★ 651 AGPL-3.0 Python Active, pushed yesterday -
9
Warmbly warmbly
The largest open-source B2B cold outreach and email warmup service.
Complete system Experimental A B2B sales team wants self-hosted cold outreach instead of Instantly or Lemlist.
★ 492 Apache-2.0 Go Active, pushed 6 days ago -
10
Colspan colspan-dev
Open source drag & drop builder for HTML emails that hold together in every inbox
Complete system Usable Marketers want to assemble email layouts visually without paying for a hosted builder.
★ 428 AGPL-3.0 TypeScript Active, pushed 4 days ago -
11
Sympa sympa-community
Sympa, Mailing List Management Software
Complete system Production-ready An institution needs many discussion or announcement lists with delegated management.
★ 315 GPL-2.0 Perl Active, pushed 3 months ago -
12
MillionSend MillionSend
The open-source email platform — self-host on your own AWS SES, or use the cloud. Resend-compatible API.
Complete system Experimental You use Resend's API but want to self-host on SES to cut costs.
★ 258 AGPL-3.0 TypeScript Active, pushed 6 days ago -
13
Business-leads-ai-automation asiifdev
Open-source AI sales & marketing OS: find leads, draft outreach in your own voice, approve, close. Self-host or use alatpintar.id
Complete system Experimental A small agency, especially in Indonesia, wants self-hosted lead finding and outreach drafting.
★ 227 AGPL-3.0 TypeScript Active, pushed 8 days ago -
14
Mailtrain Mailtrain-org
Self hosted newsletter app
Complete system Usable Only if you already run it; listmonk is a better-maintained choice for new setups.
★ 5.8k GPL-3.0 JavaScript Quiet, pushed 13 months ago -
15
Colossus vitorfs
Self-hosted email marketing solution
Complete system Experimental Only if you want a small Django codebase to adapt.
★ 576 MIT Python Quiet, pushed 3 years ago
Frameworks and platforms to build on 1
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1
Framework maizzle
The modern email development framework.
Framework or platform Production-ready Developers who know Tailwind want to code email templates in a build pipeline.
★ 1.6k MIT TypeScript Active, pushed 8 days ago
Building blocks for your own system 5
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1
Snooze thomasjohnkane
A package to simplify automating future notifications and reminders in Laravel
Building block Production-ready Your Laravel app sends time-based reminders and the delayed queue is not enough.
★ 937 MIT PHP Slowing, pushed 7 months ago -
2
SendPortal Core mettle
Core functionality for SendPortal
Building block Usable You want SendPortal's campaign features inside your own Laravel application rather than as a standalone install.
★ 299 MIT PHP Active, pushed 21 days ago -
3
EmailSpellChecker smashsend
📮 An ultratiny (1.9 KB) and fast JavaScript email checker to reduce users typing a wrong email. Written in TypeScript. Enterprise-grade.
Building block Usable Your sign-up forms collect emails and you want fewer bounced addresses.
★ 217 MIT TypeScript Active, pushed 3 months ago -
4
Mjml-react wix-incubator
React component library to generate the HTML emails on the fly
Building block Usable Only for legacy code already using it.
★ 998 MIT JavaScript Quiet, pushed 4 years ago -
5
Candymail bdcorps
Email Automations for Node.js
Building block Experimental Rarely; it has been idle since 2022.
★ 315 MIT TypeScript Quiet, pushed 5 years ago
Integrations 2
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1
Angular Email Editor unlayer
Drag-n-Drop Email Editor Component for Angular
Integration Usable You are adding a visual email builder to an Angular product and accept Unlayer's terms.
★ 222 MIT TypeScript Slowing, pushed 7 months ago -
2
GTM Skills explorium-ai
GTM Skills for Claude & Codex
Integration Usable Your sales team uses AI agents for outbound and is willing to use Explorium's data.
★ 2 MIT TypeScript Slowing, pushed 3 months ago
Developer tools 2
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1
LinkedIn Scraper TufayelLUS
A LinkedIn Scraper to scrape up to 1k LinkedIn profiles(due to LinkedIn limit) from company profile links and save their e-mail addresses if available! (actively maintained, if anything doesn't work, open an issue in the repo)
Developer tool Experimental Hard to recommend; scraping LinkedIn is the core of what it does.
★ 296 GPL-3.0 Python Quiet, pushed 16 months ago -
2
Rss2newsletter ElliotKillick
Convert RSS/Atom feed to email newsletters
Developer tool Experimental A blogger wants a free RSS-to-email newsletter and is comfortable running a script.
★ 282 AGPL-3.0 Python Quiet, pushed 2 years ago
Templates and starters 1
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1
Email Templates ColorlibHQ
Free HTML email templates for Mailchimp and other emails services
Template or starter Usable You need a decent-looking email layout quickly and do not want to design from scratch.
★ 1.2k MIT HTML Active, pushed 2 months ago
Lists, courses and other material 3
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1
Caniemail hteumeuleu
Can I email… Support tables for HTML and CSS in emails.
List, course or other material Production-ready You write HTML emails and need to check whether a feature works in Outlook, Gmail and others.
★ 948 MIT HTML Active, pushed 2 months ago -
2
Email Marketing Bible CosmoBlk
Email marketing skill for Claude Code. 88K words, 908 sources, 19 industry playbooks. Install the skill and Claude becomes your email marketing expert.
List, course or other material Usable You want an AI assistant to draft email flows using a curated body of email marketing practice.
★ 330 MIT Active, pushed 24 days ago -
3
Thinkwithblack-skill backtrue
365 free AI marketing skills (zh-TW/en) for ChatGPT, Claude, Gemini, Claude Code & Cursor — copywriting, ads budget, margin, CRM, email. 365 個免費 AI 行銷 Skills
List, course or other material Experimental A Taiwanese or Chinese-speaking marketer wants a large set of ready prompts.
★ 249 MIT Python Active, pushed yesterday
Other email marketing and newsletter software, not yet judged 1
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1
MailAccess KatrielMoses
Free email OSINT tool, 5000+ platforms, identity clustering, breach detection. No API keys required. pip install mailaccess
★ 1.7k MIT Python Active, pushed 6 days ago
Compared head to head
Also under marketing automation platforms
Open-source licenses
- Permissive: 17. Use it anywhere, including in closed products. You keep the copyright notice; Apache-2.0 also grants patent rights.
- Network copyleft: 10. Like GPL, and running a changed version as a web service counts as distributing it, so its users get the source too.
- Strong copyleft: 3. If you distribute the program or anything built on it, you must release the whole source under the same license.
Languages
TypeScript 8, Python 6, PHP 4, Go 3, JavaScript 3, HTML 2, Elixir 1, C# 1 and Perl 1.
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