listmonk vs Keila
Both are alternatives to Mailchimp. Here's how they stack up — verified facts, no spin.
Also searched as Keila vs listmonk — same comparison, one verdict.
listmonk and Keila are closely matched on ownership (92 vs 88) — this one comes down to pricing and to which trade-offs below you can live with.
listmonk
TOP PICKFast, self-hosted newsletter and mailing-list manager in a single binary.
listmonk is a self-hosted newsletter and mailing-list manager written in Go, distributed as a single binary backed by PostgreSQL. It handles large lists, subscriber management, custom fields, segmentation, templated campaigns, and click/open analytics, and sends through any SMTP provider you choose (such as Amazon SES, Postmark, or your own relay). It exposes a full HTTP API and a clean admin UI, and is a strong fit for teams and technically comfortable individuals who want to own their subscriber data and keep sending costs to whatever their SMTP provider charges.
Keila
Simple, privacy-friendly open-source newsletter tool.
Keila is an open-source newsletter application built in Elixir/Phoenix, designed to be a straightforward, privacy-conscious way to send campaigns and manage subscribers. It supports segmentation, templates, a form builder, and sending through providers like Amazon SES, Mailgun, Postmark, or plain SMTP. It is aimed at creators, small organizations, and anyone who wants a clean self-hosted newsletter tool without the complexity of a full marketing-automation suite; a paid managed cloud is also offered by its maintainers for those who prefer not to self-host.
Side by side
10 points of comparison, every one read from a verified field. Green marks the side that wins a row outright. A dash means we do not hold that fact — never that it is zero.
| listmonk | Keila | |
|---|---|---|
| Sovereignty ScoreOur transparent 0–100 composite for data ownership and exit cost. | 92 | 88 |
| Open source | Yes | Yes |
| Self-hostable | Yes | Yes |
| Local-first data | Yes | Yes |
| License | AGPL-3.0 | AGPL-3.0 |
| Pricing | Free / self-host (you pay only your server and SMTP-sending costs) | Free / self-host; optional paid managed cloud from the maintainers |
| RAM to run it wellThe figure that actually matters, not the vendor's minimum. | 1 GB | 1–2 GB for Keila and PostgreSQL together. This is an estimate from the 512 MB app limit Cloudron uses plus a small database; Keila publishes no sizing of its own. |
| Realistic running costWhat the box costs each month if you run it yourself. | $6/mo plus SMTP relay costs, against Mailchimp pricing that scales per subscriber | $6–12/mo on a 1–2 GB VPS, plus a sending service: Amazon SES is $0.10 per 1,000 emails |
| Setup timeHonest first-install estimate, not the marketing quickstart. | 1 hour for the app, plus the real work below | An hour with Docker, plus DNS (SPF/DKIM) and sender setup at your email provider |
| Ongoing maintenanceThe part nobody budgets for. | Low for the app. Deliverability is the ongoing job. | Low. Pull the new image when a release lands (releases came in May, June and September 2026; the project is still pre-1.0) and keep your sender's domain authentication and bounce handling healthy. |
listmonk is Macrostack's recommended Mailchimp alternative, so it's our pick here.
Weighing both against staying on Mailchimp? Is Mailchimp free? What it actually costs →
listmonk
Strengths
- +Single Go binary plus PostgreSQL — straightforward to deploy and low on resources
- +Bring your own SMTP provider, so sending cost is decoupled from any one vendor
- +Full REST API, custom fields, segmentation, and template management
- +Actively maintained with a large community (20,000+ GitHub stars)
- +Your subscriber data stays entirely on infrastructure you control
Trade-offs
- −You are responsible for email deliverability, SPF/DKIM/DMARC setup, and an SMTP relay
- −No built-in visual customer-journey/automation builder as deep as Mailchimp's
- −Requires comfort running a server and PostgreSQL — not a click-to-start hosted service
- −AGPL-3.0 imposes source-sharing obligations if you offer a modified version as a network service
Keila
Strengths
- +Clean, focused UI that is quick to learn for non-technical senders
- +Bring your own sending provider (SES, Mailgun, Postmark, SMTP)
- +GDPR-conscious design with double opt-in and self-owned subscriber data
- +Docker-based deployment and an optional hosted cloud if you don't want to self-host
Trade-offs
- −Smaller project and community than listmonk or Mautic
- −Fewer advanced automation and reporting features than heavyweight platforms
- −You still handle deliverability and an external sending provider when self-hosting
- −AGPL-3.0 network-copyleft obligations apply to modified network deployments
Which one fits you
The trade-offs above, turned into a decision. Find the line that describes your team.
Choose listmonk
if a lower exit cost matters more to you than any single feature, and single Go binary plus PostgreSQL — straightforward to deploy and low on resources.
Choose Keila
if clean, focused UI that is quick to learn for non-technical senders.
Neither, yet
if both carry a real cost you should weigh first — you are responsible for email deliverability, SPF/DKIM/DMARC setup, and an SMTP relay, and smaller project and community than listmonk or Mautic. If either of those is a dealbreaker for your team, the shortlist is wrong rather than the choice.
What it takes to run these yourself
Real requirements and honest running costs, not the vendor quickstart.
Self-hosting listmonk
1 GB RAM · 1 hour for the app, plus the real work below
$6/mo plus SMTP relay costs, against Mailchimp pricing that scales per subscriber
Self-hosting Keila
1–2 GB for Keila and PostgreSQL together. This is an estimate from the 512 MB app limit Cloudron uses plus a small database; Keila publishes no sizing of its own. RAM · An hour with Docker, plus DNS (SPF/DKIM) and sender setup at your email provider
$6–12/mo on a 1–2 GB VPS, plus a sending service: Amazon SES is $0.10 per 1,000 emails
listmonk vs Keila — common questions
Is listmonk a better fit than Keila for email marketing & newsletters?
It depends on what you are optimising for, and the honest split is this: listmonk scores 92 to Keila's 88 on data ownership and exit cost, so it is the safer choice if you care about being able to leave. Keila earns its place on a different axis — clean, focused UI that is quick to learn for non-technical senders. Neither is a wrong answer for every team; the table above is the actual comparison.
What happens if we want to switch later?
listmonk keeps its data local or in open formats, so leaving is an export rather than a negotiation. Keila is still self-hostable, so the files stay on your server either way — but it is not local-first by design, so check what its export produces before you rely on it.
Can I self-host listmonk or Keila?
Both can be self-hosted. The difference is what it costs you in time rather than whether it is possible — see the setup and maintenance rows above.
Are listmonk and Keila both alternatives to Mailchimp?
Yes — both appear in our Mailchimp comparison, which is why they are worth putting side by side. People usually arrive here already having decided to move off Mailchimp and now choosing between the two replacements, which is a narrower and much easier question.
More Mailchimp head-to-heads
Related alternative guides
Facts verified 2026-07-07. Licenses and pricing change — spotted something out of date? That's a correction we want.