Alternatives to

5 Best Open Source Alternatives to Mailchimp (2026)

Email marketing and automation platform

Mailchimp starts at $13/mo — these alternatives can save you money.

Citadel

All-in-one groupware solution for communication and collaboration.

Open SourceAlternative to Mailchimp

Website

Zimbra Collaboration

Email, calendar, collaboration server with Web interface and lots of integrations. ([Source Code](https://github.com/zimbra)) `GPL-2.0/CPAL-1.0` `Java`

Alternative to Mailchimp

Website

Peergos

Private and secure online storage with communication and productivity tools.

Open SourceAlternative to Mailchimp

Website

MJML

Create responsive emails with ease using MJML's semantic syntax.

Open SourceAlternative to Mailchimp

Website

RSS2EMail

Send RSS feed updates straight to your email inbox.

Open SourceAlternative to Mailchimp

GitHub

Frequently Asked Questions

What is the best free alternative to Mailchimp?

Citadel is the most popular free alternative to Mailchimp, with strong community support.

Is there an open source version of Mailchimp?

Yes! There are 0 open source alternatives to Mailchimp listed above.

How much does Mailchimp cost?

Mailchimp starts at $13/mo. The alternatives listed above include free and more affordable options.