Open source Email marketing

Newsletters, marketing automation and transactional email. Ranked by health score.

Ghost

98 · Healthy

Publishing platform for blogs and newsletters, with paid memberships, subscriptions and email delivery built in.

Free to useMIT★ 56kLast commit today

Mautic

87 · Healthy

Marketing automation platform with campaigns, segments, landing pages and lead scoring.

GPL-3.0-or-later★ 11kLast commit today

listmonk

83 · Healthy

High-performance newsletter and mailing-list manager shipped as a single binary.

AGPL-3.0★ 24kLast commit 6 days ago

useSend

74 · Stable

Email sending service with an API, SMTP, domain management and campaigns, running on Amazon SES.

AGPL-3.0★ 4.7kLast commit 30 days ago

Posta

71 · Stable

Email delivery service that lets your apps send through an HTTP API, with templates, delivery tracking and analytics.

AGPL-3.0Relicensed 2026★ 521Last commit 5 days ago

Plunk

70 · Stable

Email platform for SaaS products that combines transactional email, campaigns and automations on top of Amazon SES.

AGPL-3.0★ 5.5kLast commit yesterday

Postal

65 · Stable

Mail delivery platform for sending transactional email from your own servers.

Free to useMIT★ 17kLast commit 8 days ago

Keila

64 · Stable

Newsletter tool with a block editor, sign-up forms and campaign stats.

AGPL-3.0★ 2.2kLast commit 7 days ago

Dittofeed

61 · Stable

Customer engagement platform for automated email, SMS and push journeys.

Free to useMIT★ 3.0kLast commit 5 days ago

BillionMail

56 · Caution

Self-hosted mail server and newsletter platform for campaigns, templates and subscriber lists.

AGPL-3.0Relicensed 2025★ 16kLast commit 4 months ago

Mailtrain

15 · At risk

Self-hosted newsletter app built on Node.js.

GPL-3.0★ 5.8kLast commit 3.8 years ago

Source-available and unverified licenses

The code for these is public, but the license is not an OSI open source license, or we have not verified it yet. Check the license notes on each project before relying on it.

Notifuse

68 · Stable

Newsletter, email marketing and transactional email platform with a visual MJML editor and several sending providers.

Free core, paid extrasBusiness Source License 1.1★ 2.2kLast commit 22 days ago

At a glance

Health and license are separate verdicts: a project can be well maintained and still not be open source.

Project	Health	License	Stars	Last commit
Ghost	98 · Healthy	Free to useMIT	56k	today
Mautic	87 · Healthy	Free, share changesGPL-3.0-or-later	11k	today
listmonk	83 · Healthy	Free, share hosted changesAGPL-3.0	24k	6 days ago
useSend	74 · Stable	Free, share hosted changesAGPL-3.0	4.7k	30 days ago
Posta	71 · Stable	Free, share hosted changesAGPL-3.0Relicensed 2026	521	5 days ago
Plunk	70 · Stable	Free, share hosted changesAGPL-3.0	5.5k	yesterday
Postal	65 · Stable	Free to useMIT	17k	8 days ago
Keila	64 · Stable	Free, share hosted changesAGPL-3.0	2.2k	7 days ago
Dittofeed	61 · Stable	Free to useMIT	3.0k	5 days ago
BillionMail	56 · Caution	Free, share hosted changesAGPL-3.0Relicensed 2025	16k	4 months ago
Mailtrain	15 · At risk	Free, share changesGPL-3.0	5.8k	3.8 years ago
Notifuse	68 · Stable	Free core, paid extrasBusiness Source License 1.1	2.2k	22 days ago

Paid products these replace

Alternatives to ActiveCampaign Alternatives to beehiiv Alternatives to Bento Alternatives to Braze Alternatives to Brevo Alternatives to Campaign Monitor Alternatives to Customer.io Alternatives to GetResponse Alternatives to Kit (ConvertKit)Alternatives to Klaviyo Alternatives to Loops Alternatives to Mailchimp Alternatives to MailerLite Alternatives to MailerSend Alternatives to Mailgun Alternatives to Moosend Alternatives to Postmark Alternatives to Resend Alternatives to SendGrid Alternatives to Userlist

Scores last refreshed from GitHub on 9 October 2026. How we score.