Open Source Newsletter Platforms: Self-Hosted Options

Open source newsletter and email marketing platforms exist for the segment of senders who want subscriber data ownership and unlimited contacts without per-seat or per-contact pricing. The tradeoff is operational — you maintain the server, you configure the SMTP relay, you handle the deliverability monitoring that hosted ESPs do for you.

The cluster around open source newsletter, self hosted email marketing platform, and open source email blast covers the same question with different framing. This guide compares the actually-usable open source options in 2026 and explains what you're signing up for.

Open Source Newsletter Platforms Compared

Platform	Language	Subscriber capacity	UI quality	Best for
Listmonk	Go	Millions	Functional	Tech newsletters, devs
Mautic	PHP	1M+	Dated	Full marketing automation
Sendportal	PHP (Laravel)	100K+	Clean	Laravel teams
Keila	Elixir	100K+	Modern	Privacy-focused publishers
Ghost	Node	Limited per instance	Excellent	Publishers with newsletter sideline
phpList	PHP	100K+	Very dated	Legacy installations

Listmonk: The Easiest Self-Hosted Option

Listmonk is a single Go binary plus PostgreSQL. Deploy with Docker Compose in 15 minutes:

# docker-compose.yml
services:
  postgres:
    image: postgres:14
    environment:
      POSTGRES_USER: listmonk
      POSTGRES_PASSWORD: changeme
      POSTGRES_DB: listmonk
    volumes:
      - listmonk-db:/var/lib/postgresql/data
  
  listmonk:
    image: listmonk/listmonk:latest
    ports:
      - "9000:9000"
    depends_on:
      - postgres

Configure an SMTP relay (Amazon SES, Mailgun, Postmark, your choice) in Settings → SMTP. Import subscribers via CSV or API. Send campaigns.

Strengths:

• Single binary, low resource footprint
• Handles millions of subscribers on a $20 VPS
• Clean REST API
• Active maintainer (Kailash Nadh)
• No bloat

Weaknesses:

• Basic automation (single-step workflows)
• Functional but plain UI
• Less ecosystem than Mautic
• No native commerce or CRM features

For a privacy-respecting newsletter at any scale, Listmonk is what I recommend most often when someone asks for self-hosted.

Mautic: Full Marketing Automation Stack

Mautic is the open source equivalent of HubSpot or Marketo. Contacts, segments, campaigns, multi-step automation, lead scoring, forms, landing pages.

Deployment is heavier — PHP/MySQL on a LAMP stack, requires more memory, slower than Listmonk. Run on a $30-50/month VPS minimum for moderate volume.

Strengths:

• Full marketing automation feature set
• Mature integrations (Salesforce, HubSpot, Zapier)
• Active commercial support via Acquia
• Multi-channel (email, SMS, social, web)

Weaknesses:

• Heavier infrastructure requirements
• UI shows its 2018 origins
• Updates can break installs
• Deliverability is your responsibility

Practitioner note: Mautic deployments break in characteristic ways: cron jobs not running (campaigns stop firing), email queue backed up (sends delayed by hours), DKIM not signing because the SMTP plugin didn't pass the headers through correctly. Plan for an hour/week of operational time minimum.

Sendportal: Laravel Newsletter Manager

Sendportal is a Laravel-based open source newsletter platform. Lighter than Mautic, more polished than Listmonk. Designed to connect to SES, SendGrid, Mailgun, Postmark, or Sendinblue/Brevo for sending.

Good for: teams already running Laravel infrastructure who want to drop in newsletter management.

Less active development than Listmonk but it works.

Keila: Modern Open Source Newsletter

Keila is a newer entrant, written in Elixir/Phoenix. Modern UI, German-built with strong privacy focus, EU-friendly.

Strengths:

• Cleanest UI of the open source options
• Erlang/Elixir reliability
• Active development
• GDPR-conscious defaults

Weaknesses:

• Smaller community
• Fewer integrations
• Less battle-tested at high scale

For European publishers wanting modern UX with self-hosted data, Keila is the best fit.

Ghost: Publisher Platform with Newsletter Built In

Ghost isn't a newsletter platform — it's a publishing platform that bundles newsletter and paid subscription. If you're publishing a blog/magazine and want newsletter sending integrated, Ghost is excellent. If you're a pure newsletter operator, Listmonk or Keila are better fits.

Self-host Ghost on DigitalOcean for ~$15/month or use Ghost Pro starting at $9/month. See newsletter platform comparison in best email newsletter platforms.

phpList: The Old One

phpList has been around since 2000. It works. The UI is from 2010. Use it only if you already have a phpList install and migration is painful — don't pick it for new deployments.

What's NOT Worth Self-Hosting

The actual sending infrastructure. You can technically run Postfix or Postal or KumoMTA yourself, but the operational overhead is significant:

• IP reputation building (months of warmup)
• DKIM rotation and key management
• Bounce processing and complaint feedback loops
• Postmaster Tools setup for each domain
• Hardware/network reliability
• TLS certificate management

Use a managed SMTP relay for sending. AWS SES is the cheapest. Mailgun is good for higher volume. Postmark is best for transactional. See cloud-based email services.

If you genuinely must self-host the MTA layer (data residency, compliance, scale), see Postal setup guide and KumoMTA setup guide.

Cost Comparison at 100K Subscribers / 500K Sends/Month

Setup	Monthly cost
Listmonk + SES	$20 VPS + $50 SES = $70
Mautic + Mailgun	$40 VPS + $90 Mailgun = $130
Sendportal + Postmark	$30 VPS + $115 Postmark = $145
Hosted Mailerlite	$250+
Hosted ActiveCampaign	$350+
Hosted Klaviyo	$720+

Self-hosted is 3-10x cheaper at scale. Plus your engineering time (1-4 hours/week ops). Whether that's worth it depends on your hourly rate.

Practitioner note: I've seen "self-host to save money" projects end up costing more than the ESP they replaced because nobody budgeted ops time. Self-hosting only saves money if you have idle capacity from someone who'd otherwise be doing nothing valuable. For most growing companies, paying $250-500/month for a managed ESP is cheaper than a half-day/week of dev ops time.

DNS and Authentication for Self-Hosted

Regardless of platform, you need:

1. SPF authorizing your SMTP relay. See SPF setup guide.
2. DKIM CNAME pointing to relay (or self-managed key if running your own MTA). See DKIM setup guide.
3. DMARC at p=quarantine or p=reject. See DMARC setup guide.
4. PTR record on your sending IP if running your own MTA.
5. Subdomain isolation for newsletter vs other mail streams.

If you need help deploying open source newsletter infrastructure with proper authentication and a sending relay, book a consultation. I work with engineering teams on self-hosted email setups including Listmonk, Mautic, and custom Postfix/Postal stacks.

Sources

• Listmonk Documentation
• Mautic Documentation
• Sendportal GitHub
• Keila Documentation
• Ghost Self-Hosting Guide
• M3AAWG Sender Best Common Practices

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v1.0 · May 2026