Can I open-source Mailchimp?
YES · mature open-source replacementYes. Ghost (49k stars), Listmonk (22k stars), Mautic (10k stars) are mature open-source replacements for Mailchimp — self-host with docker and stop paying $20/mo.
They pay because email is business-critical and deliverability problems are expensive.
xdeliverability
xtemplate/editor polish
xautomation builder
xecommerce integrations
xsegmentation
xcompliance
xsupport
These projects already replace it, free.
LListmonkHigh-performance single-binary newsletter and mailing list manager with campaigns, templates, and Postgres backendopen source↗MMauticThe heavyweight open-source replacement for segmentation and automation; it also replaces ease with operations.open source↗PPlunkCampaigns, transactional mail and workflows together; audience CRM depth is thinner.open source↗What each one is, in full: Listmonk · Mautic
all 6 open-source alternatives to Mailchimp →· no votes, no pay-to-list · just what's real
Can I open-source Mailchimp?
Yes. Listmonk replaces Mailchimp today — self-host it on your own server or machine with no subscription. The full list of open-source alternatives is on this page.
How much does Mailchimp cost?
Mailchimp costs about $20/month (Standard, checked 2026-07-30), which is $240 per year. That's what you save by replacing it with open source.
What do I lose by replacing Mailchimp?
Honestly: deliverability; template/editor polish; automation builder; ecommerce integrations; segmentation; compliance; support. If any of those are load-bearing for you, keep paying.
Is there an open-source alternative to Mailchimp?
Yes: Listmonk (High-performance single-binary newsletter and mailing list manager with campaigns, templates, and Postgres backend) Mautic (The heavyweight open-source replacement for segmentation and automation; it also replaces ease with operations.) Plunk (Campaigns, transactional mail and workflows together; audience CRM depth is thinner.) All 6 curated open-source alternatives are at caniopensourceit.online/mailchimp/alternatives.