Newsletter and marketplace

Here's a curated list of open-source tools, applications, and resources to help you create, manage, and scale a powerful newsletter and marketing campaign — while keeping full ownership, control, and alignment with your trust-based, win-win philosophy.

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📨 1. Newsletter Creation & Sending

✅ Listmonk

• Type: Self-hosted newsletter and mailing list manager
• Features: Fast, modern UI, campaign analytics, subscriber segmentation
• Stack: Go + PostgreSQL
• URL: https://listmonk.app/
• Best For: Scalable newsletters with high deliverability

✅ Mautic

• Type: Open-source marketing automation platform
• Features: Email campaigns, landing pages, drip workflows, segmentation
• Stack: PHP + MySQL
• URL: https://www.mautic.org/
• Best For: Full-stack email marketing automation

✅ Postal

• Type: Mail server & bulk email platform
• Features: Self-hosted alternative to SendGrid or Mailgun
• Stack: Ruby on Rails
• URL: https://github.com/postalserver/postal
• Best For: Handling high-volume transactional emails

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🎯 2. Audience Segmentation & CRM

✅ EspoCRM

• Type: CRM with email marketing and segmentation features
• URL: https://www.espocrm.com/
• Use Case: Organize and manage subscribers, tag by interest, and run targeted campaigns

✅ Frappe/ERPNext CRM

• Type: Full ERP + CRM with communication logs
• URL: https://erpnext.com
• Use Case: If you're integrating CRM + accounting + support for a holistic view of subscribers/customers

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🌐 3. Landing Pages & Sign-Up Forms

✅ Unlayer

• Type: Open-source email and landing page editor
• URL: https://github.com/unlayer/editor
• Use Case: Drag-and-drop design for emails, signup forms, and landing pages

✅ Grav + Form Plugin

• Type: Lightweight CMS with form plugins
• URL: https://getgrav.org/
• Use Case: Fast, markdown-based website with embedded newsletter forms

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📊 4. Analytics & Campaign Tracking

✅ Plausible Analytics

• Type: Privacy-respecting web analytics
• URL: https://plausible.io/self-hosted
• Use Case: See which pages and links convert best (GDPR friendly)

✅ Matomo

• Type: Google Analytics alternative
• URL: https://matomo.org/
• Use Case: Deeper audience tracking, newsletter conversion goals

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🤖 5. Marketing Automation & Workflows

✅ n8n

• Type: Open-source workflow automation tool (like Zapier)
• URL: https://n8n.io/
• Use Case: Automate welcome emails, trigger workflows when someone clicks or subscribes

✅ Budibase

• Type: Low-code builder for internal tools and workflows
• URL: https://www.budibase.com/
• Use Case: Build custom dashboards for campaign tracking or subscriber insights

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🧰 6. Content Planning & Collaboration

✅ Outline

• Type: Open-source team wiki/documentation tool
• URL: https://www.getoutline.com/
• Use Case: Manage newsletter editorial calendar, collaboration between writers and editors

✅ HedgeDoc

• Type: Collaborative markdown editor
• URL: https://hedgedoc.org/
• Use Case: Draft content together, including newsletters or whitepapers

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🎙️ 7. Community Building & Engagement

✅ Discourse

• Type: Community forum platform
• URL: https://www.discourse.org/
• Use Case: Let your audience co-create and discuss newsletter topics

✅ Lemmy

• Type: Reddit-like federated community platform
• URL: https://join-lemmy.org/
• Use Case: Build trust via open, topic-based discussions linked to your newsletter

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🧪 8. Testing & Optimization

✅ GoAccess

• Type: Real-time log file analyzer
• URL: https://goaccess.io/
• Use Case: Know exactly how readers are accessing your content (no JS needed)

✅ Pinecone or Qdrant (with LLMs)

• Type: Open-source vector DBs
• Use Case: If using GenAI to personalize content based on user preferences

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🧱 9. Design Tools (Open Source)

✅ Penpot

• Type: Open-source design and prototyping tool (Figma alternative)
• URL: https://penpot.app/
• Use Case: Design newsletter templates and campaign visuals collaboratively

✅ Krita / Inkscape / GIMP

• Use Case: Free tools for designing infographics, banners, headers

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🗂️ 10. Repository of Templates and Knowledge

✅ Awesome-Newsletter

• URL: https://github.com/zudochkin/awesome-newsletters
• Use Case: Find inspiration and curated newsletters by topic

✅ Newsletter OS (Notion Template by Janel) (Not open-source, but very helpful)

• URL: https://newsletteros.com/
• Use Case: Organize ideas, assets, templates, swipe files, and systems

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✅ Summary Table

Purpose	Tool	Highlights
Email sending	Listmonk, Mautic	Fast, full-stack control
CRM & Segmentation	EspoCRM, ERPNext	Tag, manage, personalize
Forms & Landing	Unlayer, Grav	Fast deployment, great UX
Automation	n8n, Budibase	Trigger-based emails, flows
Analytics	Plausible, Matomo	Privacy-first insights
Content & Collaboration	Outline, HedgeDoc	Draft + schedule newsletters
Engagement & Community	Discourse, Lemmy	Build lasting conversations
Testing & Feedback	GoAccess	Server-level usage stats
Design	Penpot, Krita, Inkscape	Pro-grade visual tools

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Would you like me to:

• Design a complete open-source newsletter stack for your startup?
• Compare these with SaaS tools (like Substack, ConvertKit)?
• Integrate this with your GenAI/Supportera/Clouderpa stack?

Let's make your vision modular and future-proof.