Best Open Source Email Marketing & Newsletters Tools in 2026

Tools for building, sending, and analyzing email campaigns, newsletters, and automated email sequences.

The most popular pick this year is Listmonk with 20,015 GitHub stars, but all 5 options below are worth considering depending on your needs.

5 open source email marketing & newsletters tools — ranked by GitHub stars. Browse all

Listmonk

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

Alternative to:

Mailchimp

Mautic

Open-source marketing automation platform with email campaigns, lead management, and multi-channel marketing.

Alternative to:

HubSpot

Plunk

Open-source email platform for sending transactional and marketing emails, self-hostable with a clean API.

Alternative to:

Mailchimp

Keila

Open Source Newsletter Tool and Mailchimp alternative for creating campaigns and sign-up forms.

Alternative to:

Mailchimp

Templatical

Open-source drag-and-drop email editor with JSON templates, MJML rendering, and framework-agnostic embedding.

Alternative to:

BeeFree

How we rank these tools

Tools are ranked by GitHub stars as a proxy for community adoption and trust. Stars reflect how many developers found a project valuable enough to bookmark — a reasonable signal for quality in the open source world. We only list tools that are actively maintained and open source.

Looking for tools you can run yourself? Browse self-hosted email marketing & newsletters tools →