Best Open Source Alternatives to Constant Contact

Compare the best free and open-source alternatives to Constant Contact — self-hosted and desktop replacements you fully control, ranked by GitHub stars, license and platform support.

Curated by open-source.store · Updated August 2026 · 3 alternatives

Constant Contact

Proprietary SaaS

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Platformsweb, mobile

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Constant Contact alternatives compared

Open-source alternatives to Constant Contact, compared by stars, license and platform
Tool		License	Platforms	Self-hosted
listmonk	22,581	AGPL-3.0	LinuxmacOSWindowsDocker	Yes	Aug 2026	Visit
Mautic	10,278	GPL-3.0	LinuxmacOSWindowsDocker	Yes	Aug 2026	Visit
Sendportal	2,153	MIT	LinuxmacOSWindowsDocker	Yes	Apr 2024	Visit

Top open-source Constant Contact alternatives

listmonk22,581AGPL-3.0

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

LinuxmacOSWindowsDockerWeb

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

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Mautic10,278GPL-3.0

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

LinuxmacOSWindowsDockerWeb

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

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Sendportal2,153MIT

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

LinuxmacOSWindowsDockerWeb

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

Visit Details