5 open-source Marketing vendors
Open-source software for Marketing that you can self-host, with auditable source code — regardless of the developer's headquarters.
- vendors scored
- 5
- European
- 3
- foreign-owned
- 1
- last checked
- 11 October 2026
Vendors, scored
Score per vendor: 0 = high exposure, 100 = sovereign
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- Sovereignty score 94 out of 100AGNITASGermany · EU sovereignMunich-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.
- Sovereignty score 94 out of 100KeilaGermany · Self-hosted / open sourceGerman open-source, self-hostable email-marketing platform.
- Sovereignty score 94 out of 100Yoast SEONetherlands · Self-hosted / open source · owner in United StatesWordPress search engine optimisation plugin from Yoast BV in Wijchen; the plugin is open source (GPLv3) and runs on the site owner's own WordPress installation.
- Sovereignty score 79 out of 100ListmonkIndia · Self-hosted / open sourceSelf-hostable open-source newsletter and mailing list manager
- Sovereignty score 71 out of 100MauticUnited States · Self-hosted / open sourceOpen 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.
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