free email marketing softwares


Completely Free and Open Source Enterprise-Grade Email Marketing Software to Send Unlimited Emails for Free 

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Email marketing remains one of the most effective digital marketing strategies, offering an impressive ROI of 36forevery1 spent (Source: Litmus). However, premium email marketing services like Mailchimp, ActiveCampaign, or HubSpot can be expensive, especially for startups, nonprofits, and small businesses.


The solution? Free and open-source email marketing software. These platforms provide enterprise-grade features without the high costs, allowing you to send unlimited emails, manage subscribers, and automate campaigns—all while keeping full control of your data.


In this guide, we’ll explore the best open-source email marketing tools that let you self-host and send emails for free, along with their features, pros, cons, and setup instructions.


Why Use Open-Source Email Marketing Software?

✅ No Monthly Fees – Avoid subscription costs (unlike Mailchimp, Constant Contact).
✅ Unlimited Emails – Send as many campaigns as you want.
✅ Full Data Ownership – No third-party access to your subscriber lists.
✅ Customizable – Modify the software to fit your needs.
✅ Self-Hosted – Host on your own server for better privacy & control.


Who Should Use These Tools?

  1. Startups & Small Businesses (Low budget, high email volume)
  2. Developers & Tech-Savvy Marketers (Want full control)
  3. Nonprofits & Educational Institutions (Need cost-effective solutions)
  4. Agencies (Manage multiple clients securely)


7 Best Free & Open-Source Email Marketing Software


1. SendPortal – Open-Source Self-Hosted Email Marketing

🔹 Best For: WordPress users who want seamless integration.

Key Features:

  • Built for WordPress (Plugin available)
  • Drag-and-Drop Email Builder
  • Automation Workflows (Drip campaigns)
  • Subscriber Segmentation
  • Real-Time Analytics
  • REST API for Custom Integrations

Pros:

✔ Easy to set up (WordPress plugin)
✔ Clean, user-friendly interface
✔ Free & open-source

Cons:

❌ Limited advanced automation (compared to Mautic)
❌ Requires WordPress

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2. Keila – A Modern Open-Source Newsletter Tool

🔹 Best For: Developers who want a lightweight, API-driven solution.

Key Features:

  1. Simple, Fast Interface
  2. Email Templates & Editor
  3. Contact Management
  4. SMTP & API Integration
  5. Self-Hosted or Cloud Option

Pros:

✔ Extremely lightweight
✔ Docker support for easy deployment
✔ Good for developers

Cons:

❌ Fewer built-in templates
❌ No visual automation builder

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3. PhpList – The Oldest Open-Source Email Marketing Tool

🔹 Best For: Large lists (handles millions of subscribers).

Key Features:

  1. Unlimited Subscribers & Emails
  2. Advanced Segmentation
  3. Bounce Management
  4. Plugins for Extensions
  5. Supports A/B Testing

Pros:

✔ Battle-tested (used since 2000)
✔ Highly scalable
✔ Strong community support

Cons:

❌ Outdated UI
❌ Steeper learning curve

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4. Listmonk – High-Performance Self-Hosted Newsletter Tool

🔹 Best For: High-volume email senders needing speed.

Key Features:

  1. Blazing Fast (Written in Go)
  2. Multi-Tenancy Support
  3. JSON API for Integrations
  4. Advanced Analytics
  5. Supports Postgres & MySQL

Pros:

✔ Extremely fast
✔ Minimal server requirements
✔ Great for developers

Cons:

❌ No drag-and-drop editor
❌ Requires technical setup

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5. OpenEMM – Enterprise-Grade Email Marketing

🔹 Best For: Businesses needing advanced automation.

Key Features:

  1. Drag-and-Drop Editor
  2. Automation & Trigger-Based Emails
  3. A/B Testing
  4. CRM Integration
  5. Detailed Reporting

Pros:

✔ Feature-rich
✔ Good for large enterprises
✔ Strong security

Cons:

❌ Complex setup
❌ Requires Java

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6. SendBlaster – Free Bulk Email Software (Windows)

🔹 Best For: Windows users needing offline email marketing.

Key Features:

  1. Offline Email Campaigns
  2. SMTP & Mailing List Management
  3. Basic Automation
  4. Supports CSV Imports

Pros:

✔ No hosting required
✔ Simple for beginners

Cons:

❌ Windows-only
❌ Limited automation

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7. Mautic – Open-Source Marketing Automation (Beyond Email)

🔹 Best For: All-in-one marketing automation (email + CRM + tracking).

Key Features:

  1. Email + SMS + Social Automation
  2. Lead Scoring & Segmentation
  3. Landing Page Builder
  4. Dynamic Content Personalization

Pros:

✔ Most advanced free tool
✔ Integrates with CRM (Salesforce, HubSpot)

Cons:

❌ Requires more server resources
❌ Steeper learning curve

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Comparison Table

SoftwareBest ForSelf-HostedAutomationEase of Use
SendPortalCommon Users✅Basic⭐⭐⭐⭐
KeilaDevelopers✅Basic⭐⭐⭐
phpListLarge Lists✅Medium⭐⭐
ListmonkHigh Volume✅Basic⭐⭐
OpenEMMEnterprises✅Advanced⭐⭐⭐
SendBlasterWindows Users❌Basic⭐⭐⭐⭐
MauticFull Automation✅Advanced⭐⭐



How to Choose the Right Tool?

  • For Common emailing → SendPortal
  • For Developers → Listmonk or Keila
  • For Large Lists → phpList or OpenEMM
  • For Full Automation → Mautic
  • For Offline Windows Use → SendBlaster


Final Thoughts

Open-source email marketing software provides powerful, cost-effective alternatives to expensive SaaS platforms. While they require some technical setup, the benefits—unlimited emails, full data control, and customization—make them worth it.


Recommended Picks:

  • Best for Beginners: SendPortal (Basic sending and integration with existing application)
  • Best for Automation: Mautic
  • Best for High Volume: Listmonk


👉 Have you tried any of these tools? Share your experience in the comments!


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