Best Open Source Alternatives to Mailchimp

High-performance, self-hosted newsletter and mailing list manager written in Go.

vs Mailchimp: a free, open-source option you fully control, licensed AGPL-3.0.

Open-source marketing automation software for email marketing, lead tracking, and campaign building.

vs Mailchimp: a free, open-source option you fully control, licensed GPL-3.0.

Open-source self-hosted email marketing application that connects to transactional services like SES or Mailgun.

vs Mailchimp: a free, open-source option you fully control, licensed MIT.