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listmonk is a self-hosted newsletter and mailing list manager packaged as a single binary.

BillionMail is an open-source mail server and email marketing platform for sending newsletters, promotional emails, and transactional messages.

Open source marketing automation software for creating and managing integrated marketing campaigns.

Plunk is an open-source email platform for sending transactional emails, campaigns, and automations from self-hosted applications.

Dittofeed is an open-source omni-channel customer engagement platform for sending broadcasts and automated user journeys across channels like email, SMS, WhatsApp, Slack, and mobile push.

Keila is an open source newsletter tool for sending campaigns and creating sign-up forms.

phpList is an open source email marketing manager for creating, sending, integrating, and analysing email campaigns and newsletters.

A free, self-hosted CRM built with Python and Django for managing leads, deals, contacts, tasks, email campaigns, and analytics.

Hitobito is an open source web application for managing organizations and communities with complex group hierarchies, members, events, courses, mailings, and communication.

A Django-based blogging platform with subdomain-based user blogs, publishing tools, and deployment support.

Sympa is an electronic mailing list manager that automates subscription, moderation, archive management, and message delivery for mailing lists.

A self-hostable changelog and roadmap platform with emoji reactions, themes, newsletters, and an admin dashboard.