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2 open source alternatives to Mailchimp

Email marketing and automations. Here are the open source projects real teams use instead — ranked by fit, with honest pros and cons for each.

What people don't love about Mailchimp

  • Pricing scales by contact count.
  • Deliverability has been patchy.
  • Intuit acquisition changed direction for some users.

Current Mailchimp pricing (for reference): Free up to 500 contacts; Essentials from $13/month.

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Quick comparison

Alternative Best for License Self-host Hosted cloud?
Listmonk
Self-hosted newsletter and mailing list manager.
Sending plain newsletters at low cost — bring your own SMTP. AGPL-3.0 ★★☆☆☆ Self-host only
Mautic
Open source marketing automation platform.
When you actually need marketing automation, not just sends. GPL-3.0 ★★★★☆ Yes

1. Listmonk — Sending plain newsletters at low cost — bring your own SMTP.

Self-hosted newsletter and mailing list manager.

Strengths

  • Fast Go binary — single executable.
  • Clean UI and import/export tools.
  • Bring-your-own-SMTP (Amazon SES, Postmark, etc.).

Weaknesses

  • No drag-and-drop visual builder.
  • Deliverability depends on your SMTP setup.
  • Not a visual marketing suite — plain newsletter focus.
License: AGPL-3.0 Self-host difficulty: 2/5

Listmonk homepage · Source on GitHub · Mailchimp vs Listmonk →

2. Mautic — When you actually need marketing automation, not just sends.

Open source marketing automation platform.

Strengths

  • Full marketing automation — campaigns, landing pages, scoring.
  • Large ecosystem.
  • Strong for B2B lead nurturing.

Weaknesses

  • Heavy self-host setup (PHP + queue + cron).
  • UI is complex and has a learning curve.
  • Smaller company behind — not as polished as Mailchimp.
License: GPL-3.0 Self-host difficulty: 4/5 Hosted cloud option

Mautic homepage · Source on GitHub · Mailchimp vs Mautic →

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