4 open-source Marketing vendors.

Open-source software for Marketing that you can self-host, with auditable source code — regardless of the developer's headquarters.

• AGNITASEU sovereign

  Munich-based email marketing and marketing automation vendor (AGNITAS AG), founded 1999. ISO 27001/27017/27018 triple-certified, German-hosted cloud infrastructure. Offers SaaS, private cloud, and on-premise licensing, plus a free open-source edition (OpenEMM). Serves banking, insurance, energy, logistics, and public-sector clients; actively developed with a 25th-anniversary release noted in 2024.

  Germany

• KeilaSelf-hosted / open source

  German open-source, self-hostable email-marketing platform.

  Germany

• ListmonkNon-EU vendor

  Self-hostable open-source newsletter and mailing list manager

  India

• MauticSelf-hosted / open source

  Open source marketing automation platform, community-owned under the Open Source Collective (US 501(c)(6) fiscal host). Trademark held by the Open Source Collective on behalf of the Mautic community following Acquia's 2019 acquisition and subsequent 2024/2025 brand transfer to the community.

  United States