Open-source Sender alternatives

listmonk is a self-hosted application for managing newsletters and mailing lists. It is distributed as a single binary, backed by a PostgreSQL database, and gives you a modern web dashboard for managing subscribers, lists and email campaigns. A live demo and documentation on listmonk.app let you look around before installing.

Topics show the scope: email marketing, newsletter management, campaign management, SMTP delivery, transactional emails and SMS gateway use. Installation is straightforward. With Docker you use the published image and a sample compose file and then visit port 9000. With the binary you generate a config file, run the install step to set up the database, or run an idempotent upgrade, and start the server.

Its server side is Go, while the interface is built with Vue and the Buefy component library. The project is free software under the AGPL-3.0 license, and a developer setup guide helps contributors. It suits creators, organizations and developers who want to send newsletters through their own SMTP provider without per-subscriber fees from a hosted email service.

Mautic is open-source marketing automation software. It lets businesses and organizations build integrated marketing campaigns, including email marketing, while keeping control of their own data. The project is supported by a worldwide community of contributors and presents privacy and extensibility as core goals.

The README highlights several advantages over conventional hosted tools: it is free to use, you can run it on your own infrastructure with your own database, there is no vendor lock-in, integrations can be built as needed, and both the frontend and backend are customizable. It also describes multi-channel marketing without extra cost and unlimited segmentation and automation.

Mautic is written in PHP. It can be downloaded and self-hosted, or you can request a trial of a hosted option, and community channels and a blog share news, releases and strategy. Its license is stated in the repository. It suits marketing teams that want automation without relying entirely on a third-party SaaS provider.

BillionMail is an open-source platform that combines a mail server with newsletter and email marketing tools. It is meant for businesses and individuals who want to send newsletters, promotional email, or transactional messages themselves instead of paying monthly fees to a marketing service. It is written in Go and released under the AGPL-3.0 license.

Under the hood it relies on established components, with topics naming Postfix, Dovecot, Rspamd, and SMTP. The product adds campaign creation and sending, advanced analytics, and customer management on top, and the README promotes a quick three-step setup. Documentation is available in several languages and there is a Discord community.

Running your own mail infrastructure involves deliverability work such as DNS records and sender reputation, which the README does not detail. It suits developers, small businesses, and communities that want control over their email lists and sending, and that are willing to host and maintain the server.

Notifuse is a modern, self-hosted emailing platform for sending newsletters and transactional email at a fraction of the cost of hosted services. It is built with Go and React and presented as an open-source alternative to Mailchimp, Brevo, Mailjet, Listmonk, MailerLite, and Klaviyo. The input lists its license only as other.

Email marketing features include a drag-and-drop visual builder with MJML components and live preview, campaign scheduling, A/B testing of subject lines, content, and send times, list segmentation, and contact profiles with custom fields. Automations use a visual canvas with nodes for delays, emails, branches, filters, list changes, A/B tests, and webhooks, and Liquid templating personalizes messages. Messages are sent through seven providers, with topics naming Amazon SES, Mailgun, Postmark, and SendGrid.

For people who prefer not to run it themselves, Notifuse Cloud offers managed hosting, which the README says starts at 16 dollars per month, and a live demo is available. It suits marketers and developers who want lower costs and control over subscriber data.

Dittofeed is an omni-channel customer engagement platform. Teams use it to send one-off broadcasts or build automated, event-driven user journeys that reach people by email, mobile push notifications, SMS, WhatsApp, Slack and other channels. The project positions itself as a developer-friendly, open-source alternative to OneSignal, Customer.io and Segment Engage.

A typical setup starts by connecting user data through Segment, reverse ETL or the Dittofeed API. You then build segments with multiple operators, design message templates in HTML, MJML or a low-code editor, and send through providers such as SendGrid or Amazon SES. A dashboard tracks message performance, and the tools can be embedded in another product through an iframe or a headless React component.

The core is written in TypeScript and licensed under MIT. It can be self-hosted with Docker Compose or deployed to Render, and a hosted cloud trial is also offered. According to the README, features such as multi-tenancy, embedding and white-labeling belong to a separate licensed, closed-source codebase that you can ask the team about.