EU Alternatives to ActiveCampaign

ActiveCampaign
ActiveCampaign is a U.S.-based marketing automation platform that combines email marketing, CRM, and sales automation. It helps businesses build newsletters, segmented email audiences, and run targeted campaigns. Popular among SMEs, ActiveCampaign also owns Postmark for transactional email services.
European Alternatives
Germany 🇩🇪
CleverReach is a newsletter and email marketing platform based in Germany.
Lithuania 🇱🇹
Free
Sender.net is an email marketing platform based in Lithuania.
Poland 🇵🇱
MessageFlow offers newsletters, transactional emails, SMS, and push notifications.