Self-Hosted Email Marketing Software: 2026 Comparison

There are roughly seven self-hosted (or self-hostable) email marketing platforms worth considering in 2026. They are not all alike, and the “best” one depends on which trade-off you can absorb. We make one of them — Broadcast — and we have used or stood up the others. The honest comparison below is the page we wished existed when we started.

What counts as “self-hosted email marketing software”

To make this comparison meaningful, we’re using a strict definition. A self-hosted email marketing platform must:

1. Run on your infrastructure (a VPS, container, or your own hardware) — not as a hosted SaaS that happens to call itself “open.”
2. Store subscribers, segments, and campaign data in a database you control.
3. Provide a UI or API to compose, schedule, and send broadcasts to a list (this is what excludes pure SMTP relays).
4. Be actively maintained — public commits or releases in the past 12 months.

What this excludes:

• Postal, Haraka, Mailcow. These are mail servers (MTAs) or mail-server suites. They send mail; they don’t manage marketing lists. People often confuse them with email-marketing platforms — they’re complementary, not substitutes.
• Self-hosted Mailchimp. Mailchimp is not self-hostable. The phrase usually means “I want a Mailchimp-shaped product I can self-host” — that’s what most of the platforms below are.
• Abandoned projects. OpenEMM, OpenEMM-fork variants, and several historical PHP tools fail the maintenance test.

The seven options at a glance

The rest of this page goes one by one. Read the sections relevant to you and skip the rest.

Broadcast

What it is. A commercial self-hosted email marketing platform built on Rails. One-time licence, you run it on your own server, you connect it to your own ESP (Amazon SES, Postmark, SendGrid, Resend, Mailgun, or SMTP). See features.

Strengths. - Bring your own ESP — your sender reputation is portable. - Single Docker image, sets up in about 30 minutes via the automatic installer. - Sequences with conditional branching, segmentation, opt-in forms, transactional API, webhook endpoints — feature-parity with the SaaS tools most people consider. - Multi-domain / multi-channel support out of the box, which most OSS alternatives don’t have. - Autopilot can generate newsletter content with AI on a schedule.

Weaknesses. - Commercial licence — not free, not open source. You’re paying for the polish and the maintained release cadence. - No drag-and-drop visual editor. Rich text + HTML + Liquid templates. - Younger than Mautic and phpList; smaller community.

Pick this if. You want a Mailchimp-grade product experience but on your own infrastructure, and a maintained release cadence matters more than the source-code freedom of OSS.

Mautic

What it is. The largest open-source marketing automation platform. Founded 2014, sponsored by Acquia for many years, now community-led under a foundation.

Strengths. - The most sophisticated automation graph builder of any platform in this list — closest analogue to ActiveCampaign’s “Customer Journeys.” - Genuinely full-featured: landing pages, dynamic content, lead scoring, CRM integrations. - Large, established community; many integration plugins.

Weaknesses. - Heavyweight PHP application. The recommended hosting is non-trivial — Apache or Nginx, PHP-FPM, MySQL, cron, Redis or a message queue. Multiple moving parts. - The UI is feature-dense; non-technical marketers report a steep learning curve. - Deliverability handling depends heavily on how you wire up the queue. Misconfiguration is common. - Upgrade path between major versions has historically been rough; allocate time when you upgrade.

Pick this if. You have a PHP-comfortable ops person, a marketing team that needs deep automation, and the willingness to spend a week dialling in the configuration.

Listmonk

What it is. A modern, fast newsletter and mailing list manager written in Go. Single binary or Docker container. Permissive AGPL licence.

Strengths. - Genuinely lightweight — one binary, one database (Postgres), one config file. - Extremely fast: it can sustain very high throughput on modest hardware. - Clean API, good developer experience. - Active maintenance (the maintainer ships consistent releases).

Weaknesses. - Minimal automation. No drip sequences, no triggered emails, no branching. It is a broadcast tool, full stop. If you need a welcome series, you’ll wire it up externally. - No opt-in form builder beyond a basic embeddable subscribe form. - Reporting is functional but spare.

Pick this if. You send a newsletter and only a newsletter, you’re comfortable with the trade of “less product surface area for fewer footguns,” and you don’t need sequences.

Sendy

What it is. A long-running PHP application that wraps Amazon SES. One-time commercial licence (around $69 at time of writing).

Strengths. - Cheapest entry point of any platform here. - Tight SES integration — bounce handling, complaint feedback, IP warm-up. - Stable; the product has been the same shape for nearly a decade.

Weaknesses. - SES-only. If you ever want to switch relays, you switch platforms. - The product has been the same shape for nearly a decade. The UI looks it. - Automation features are essentially “autoresponders.” No real sequences. - License is per-installation; using it for client projects gets expensive quickly.

Pick this if. You are committed to SES, you want a minimal wrapper around it, and the dated UI doesn’t matter to you.

phpList

What it is. One of the oldest open-source mailing list managers, originally written in 2000. Still actively maintained.

Strengths. - Very mature. The edge cases have been hit. - Strong subscription management, including double opt-in done well. - Active community, especially among non-profits.

Weaknesses. - The UX is from another era. Modern marketers find it jarring. - Automation is limited to scheduled sends and simple campaigns. - Performance at scale requires careful tuning.

Pick this if. You are running a non-profit or community mailing list where stability matters more than UI, and your team has used phpList before.

Keila

What it is. An open-source newsletter platform from Germany, written in Elixir. AGPL-licensed.

Strengths. - European origin, European hosting recommended, AGPL — solid story for DPO conversations. - Clean, modern UI — closest to Mailchimp’s polish among OSS options. - Elixir / Phoenix runtime handles concurrency well.

Weaknesses. - Smaller community than Mautic or Listmonk; fewer integration plugins. - Elixir hosting is straightforward but less common than PHP or Node — slightly harder to find ops help. - Automation is still maturing.

Pick this if. You’re in the EU, AGPL fits your project, and you want a modern UI without going commercial.

Mailtrain

What it is. Node.js-based open-source newsletter platform. Long-running and steadily maintained.

Strengths. - Built on the Node ecosystem — easy for JS-comfortable teams to extend. - Good template system. - Multi-list, segments, basic automation.

Weaknesses. - Quality varies between major versions; v2 was a substantial rewrite. - Smaller community than Mautic.

Pick this if. Your team already runs Node services and prefers extending in JavaScript.

How to choose: a quick decision flow

1. List size under 5,000 and no compliance angle? Stay on SaaS for now. Revisit in a year.
2. You only send a newsletter, no sequences, technical team? Listmonk.
3. You’re already paying for SES and want the cheapest wrapper? Sendy (but accept you’re SES-locked).
4. EU origin / AGPL preference / DPO-friendly story is the top priority? Keila.
5. You need deep automation graphs (drip + branching + lead scoring) and you have PHP ops capability? Mautic.
6. You want a polished, maintained, Mailchimp-grade UX with sequences, on your own infrastructure, without source-code obligations? Broadcast.
7. You’re already deep in Node and need basic automation? Mailtrain.

The fact that the right answer differs for different teams is the point. Don’t pick a self-hosted platform because the licence checkbox satisfies an internal preference. Pick the one whose trade-offs match your actual workload.

What’s missing from this list, and why

• OpenEMM, Interspire Email Marketer. Either abandoned or licence-restricted to the point of being functionally unavailable.
• Postal, Haraka, Mailcow, MX Vault. Mail servers and relays, not list managers. Use them with one of the platforms above.
• Hosted “open source” SaaS (some “open” newsletter platforms). If you can’t run it on your own server, it’s not self-hosted for the purposes of this comparison.
• WordPress plugins (FluentCRM, MailPoet, Newsletter). Worth considering if you’re already on WordPress; they’re a different category — coupled to a CMS rather than standalone applications.

Frequently asked

Which is the best self-hosted email marketing software in 2026?

There isn’t one — that’s the point of this comparison. Listmonk wins on speed and simplicity. Mautic wins on automation depth. Keila wins on European-origin AGPL story. Broadcast wins on polish, sequences-with-conditionals, and bring-your-own-ESP flexibility. Pick by use case.

Is Mailchimp self-hosted or open source?

Neither. Mailchimp is closed-source SaaS owned by Intuit. “Self-hosted Mailchimp” usually means “I want a Mailchimp-like product I can self-host” — that’s what most of the platforms in this list are.

Can I run a self-hosted email marketing platform without a separate SMTP relay?

Technically yes, but you shouldn’t. Running your own MTA from a cold IP in 2026 means months of warm-up and ongoing reputation work. Use a transactional relay (SES, Postmark, SendGrid, Resend) as the smarthost — that’s the standard pattern.

What does Broadcast cost compared to the open-source options?

Broadcast is a one-time commercial licence (see pricing on the homepage). The OSS options are free in licence terms, but you’ll spend some setup and maintenance time. The honest question is whether the commercial licence saves you more time and surface area than it costs.

Which one handles deliverability best?

Deliverability is mostly the relay’s job, not the platform’s. If you put SES or Postmark behind any of these platforms, your deliverability will be approximately as good as SES or Postmark. The platform’s role is bounce processing, complaint handling, suppression lists — table-stakes for all the platforms above.

Related

• Self-hosted broadcast email — costs and trade-offs
• The self-hosted Mailchimp alternative
• Open-source vs source-available vs proprietary self-hosted
• Broadcast vs. Mailchimp
• Broadcast vs. ConvertKit / Kit