listmonk

Email marketing tools love to charge you per subscriber, so growing your list can feel like being punished for success. listmonk takes a wildly different approach: it's a free, open-source, self-hosted newsletter and mailing-list manager that can handle millions of subscribers — with no per-contact bill, because you run it yourself.

Own your list, at any scale

listmonk is built to manage newsletters, mailing lists and transactional communications entirely on your own infrastructure. It comfortably handles millions of subscribers across single and double opt-in lists, and its standout power feature is SQL-based segmentation: you can query and segment your audience using SQL expressions, giving you far more precise targeting than the rigid filters most hosted tools offer. For data-savvy senders, that flexibility is a dream.

Fast, flexible sending

Under the hood, listmonk is engineered for performance with a high-throughput, multi-SMTP email queue, so it can push large campaigns quickly across multiple sending providers. It supports powerful templating using Go's templating language, with both drag-and-drop and WYSIWYG editors, plus a transactional message API for the automated emails your apps need to send. It's as comfortable powering a big newsletter as it is firing off receipts and password resets.

Modern extras, real privacy

listmonk includes built-in analytics to visualize campaign performance, extensible messenger webhooks so you can push messages to SMS or WhatsApp, subscriber privacy controls, and OIDC SSO authentication for secure team access. It's a genuinely complete platform, not a bare-bones script.

Free, forever, and yours

Because listmonk is AGPLv3-licensed open source, there's no subscription and no vendor holding your audience hostage. You pay only for the server and email-sending costs you'd have anyway — which, for large lists, can mean enormous savings over hosted alternatives.

Who it's for

listmonk is for organizations and individuals who want self-hosted control over their email — developers, privacy-conscious teams, and anyone with a large list who's tired of per-subscriber pricing and wants to own their data end to end.

Pricing

listmonk is completely free and open source (AGPLv3). Your only costs are hosting and your email-sending provider — there's no software fee no matter how big your list grows.

For anyone who has watched a hosted email tool's bill balloon as their list grew, the economics are the headline: with listmonk, doubling your subscribers doesn't double your software cost, because there isn't one. Combined with SQL-level control over segmentation, that makes it a favorite of technically comfortable teams who'd rather own their sending stack outright than rent it by the contact forever.

Bottom line: listmonk is the self-hosted, open-source newsletter manager for people who want to own their list at scale — SQL segmentation, high-throughput sending, and zero per-subscriber fees.