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Open-source repos for Email

47 repos tagged Email, sorted by GitHub stars. Add filters from the other category types to narrow the list.

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  1. TryGhost/Ghost

    Publishing platform for blogs and newsletters with paid memberships built in.

    CMS, Newsletter publishing, Payments, Web, Stripe, Marketing, Media and publishing, Creators, Newsletters, Self hosters

    55.7k starsMITUpdated 3 Nov 2026

  2. chatwoot/chatwoot

    Omnichannel support desk combining live chat, email, WhatsApp and social inboxes with an AI assistant.

    Helpdesk, Chatbots, Knowledge base, Web, WhatsApp, Customer support, SaaS, E-commerce, Self hosters

    38.7k starsOtherUpdated 2 Nov 2026

  3. dgtlmoon/changedetection.io

    Monitors web pages for content, price or restock changes and sends alerts to email, Slack and more.

    Web scraping, Social listening, Monitoring, Docker, Slack, Marketing, Operations, E-commerce, Retail, Self hosters

    35.5k starsApache-2.0Updated 2 Nov 2026

  4. ComposioHQ/composio

    Toolkit that connects agents to 250+ apps like Gmail, Slack and GitHub with managed auth.

    AI agents, Workflow automation, GitHub, Slack, Engineering, SaaS

    30.9k starsMITUpdated 3 Nov 2026

  5. enescingoz/awesome-n8n-templates

    Collection of 280+ importable n8n workflow files for Gmail, Telegram, Slack, Notion, AI agents and RAG bots.

    Workflow automation, AI agents, Chatbots, Telegram, Slack, Operations, Marketing, Agencies, No-code, Solo founders

    26.2k starsOtherUpdated 12 Sept 2026

  6. knadh/listmonk

    Newsletter tool you host yourself that handles subscriber lists, campaigns, templates and analytics from one binary.

    Email campaigns, Newsletter publishing, Docker, Marketing, Media and publishing, SaaS, Newsletters, Self hosters

    24.1k starsAGPL-3.0Updated 3 Nov 2026

  7. resend/react-email

    Write and preview email templates as React components that render to cross-client HTML.

    Email campaigns, Engineering, Marketing, SaaS

    19.9k starsMITUpdated 31 Oct 2026

  8. docker-mailserver/docker-mailserver

    Mail server in a single container with SMTP, IMAP, antispam and antivirus, configured by files.

    Email hosting, Docker, Operations, Self hosters

    19.7k starsMITUpdated 3 Nov 2026

  9. uvdesk/community-skeleton

    PHP helpdesk with multichannel ticketing, workflows and a knowledge base for ecommerce support.

    Helpdesk, Knowledge base, Web, Customer support, E-commerce, Self hosters

    19.6k starsOSL-3.0Updated 7 Oct 2026

  10. mjmlio/mjml

    Markup language that compiles to responsive HTML emails that render correctly across mail clients.

    Email campaigns, Marketing, Engineering

    18.3k starsMITUpdated 23 Oct 2026

  11. postalserver/postal

    Mail delivery platform for sending transactional and bulk email from your own servers, like a self-hosted SendGrid.

    Email hosting, Email campaigns, Engineering, Operations, SaaS, Self hosters, Solo founders

    16.9k starsMITUpdated 30 Oct 2026

  12. Billionmail/BillionMail

    Self-hosted mail server plus newsletter and email marketing platform.

    Email campaigns, Newsletter publishing, Docker, Marketing, E-commerce, Newsletters, Self hosters

    16.2k starsAGPL-3.0Updated 11 Jun 2026

  13. stalwartlabs/stalwart

    All-in-one mail and collaboration server in Rust supporting JMAP, IMAP, SMTP, CalDAV and CardDAV.

    Email hosting, Operations, Self hosters

    15.7k starsUpdated 2 Nov 2026

  14. mail-in-a-box/mailinabox

    Turnkey setup that turns an Ubuntu server into a complete mail server with webmail, DNS and backups.

    Email hosting, Operations, Self hosters

    15.5k starsCC0-1.0Updated 22 Oct 2026

  15. mailcow/mailcow-dockerized

    Full mail server suite in Docker with SMTP, IMAP, webmail, antispam and an admin UI.

    Email hosting, Docker, Operations, IT and security, Self hosters

    13.7k starsGPL-3.0Updated 2 Nov 2026

  16. leemunroe/responsive-html-email-template

    Simple responsive HTML email template that works across common mail clients.

    Email campaigns, Newsletter publishing, Marketing, Newsletters

    13.7k starsMITUpdated 20 Aug 2024

  17. mautic/mautic

    Open-source marketing automation platform for email campaigns, segments, lead scoring and landing pages.

    Email campaigns, Workflow automation, Lead generation, Marketing, Sales, B2B services, SaaS, Self hosters

    10.9k starsOtherUpdated 3 Nov 2026

  18. reacherhq/check-if-email-exists

    Tests whether an email address is real without sending a message, from a command-line tool or an HTTP service.

    Enrichment, Email campaigns, Sales, Marketing, B2B services, SaaS, Self hosters

    10.4k starsMITUpdated 30 Oct 2026

  19. zammad/zammad

    Web helpdesk with ticketing across email, chat, phone and social, plus SLAs and a knowledge base.

    Helpdesk, Knowledge base, Web, Customer support, SaaS, B2B services, Self hosters

    6.1k starsAGPL-3.0Updated 3 Nov 2026

  20. useplunk/plunk

    Self-hostable email platform for marketing campaigns, transactional mail and event-triggered automations.

    Email campaigns, Workflow automation, AWS, Marketing, SaaS, Self hosters

    5.6k starsAGPL-3.0Updated 1 Nov 2026

  21. unlayer/react-email-editor

    Drag-and-drop email editor component you can embed in a React app.

    Email campaigns, Marketing, Engineering, SaaS

    5.3k starsMITUpdated 1 Nov 2026

  22. freescout-help-desk/freescout

    Self-hosted shared mailbox helpdesk, a Help Scout alternative with modules for chat and workflows.

    Helpdesk, Web, Customer support, SaaS, E-commerce, Self hosters

    4.6k starsAGPL-3.0Updated 2 Nov 2026

  23. erxes/erxes

    Plugin-based platform combining CRM, team inbox, live chat, knowledge base and marketing automation.

    CRM, Helpdesk, Knowledge base, Web, Sales, Customer support, SaaS, B2B services, Self hosters

    4.1k starsOtherUpdated 3 Nov 2026

  24. osTicket/osTicket

    Long-running PHP support ticket system that turns emails and web forms into tracked tickets.

    Helpdesk, Web, Customer support, Education, Government, Self hosters

    4k starsGPL-2.0Updated 18 Jun 2026

  25. espocrm/espocrm

    Web CRM for leads, accounts, opportunities and cases with a flexible entity manager and email integration.

    CRM, Helpdesk, Web, Sales, Customer support, B2B services, Self hosters

    3.5k starsAGPL-3.0Updated 2 Nov 2026

  26. taylorwilsdon/google_workspace_mcp

    MCP server covering Gmail, Calendar, Drive, Docs and Sheets for AI assistants.

    AI agents, Workflow automation, Google Sheets, Operations, Sales

    3.5k starsMITUpdated 31 Oct 2026

  27. abhinavxd/libredesk

    Single-binary customer support desk with shared inboxes, automation rules and SLA tracking.

    Helpdesk, Web, Customer support, SaaS, Self hosters

    3.1k starsAGPL-3.0Updated 2 Nov 2026

  28. dittofeed/dittofeed

    Customer engagement platform for automated email, SMS and push journeys based on user events.

    Email campaigns, Workflow automation, Onboarding, Marketing, Product, SaaS, Self hosters

    3k starsMITUpdated 13 Oct 2026

  29. laudspeaker/laudspeaker

    Open-source tool for building multi-step customer journeys across email, SMS and push.

    Email campaigns, Workflow automation, Onboarding, Marketing, Product, SaaS

    2.6k starsOtherUpdated 10 Jul 2026

  30. Notifuse/notifuse

    Self-hosted platform for newsletters and transactional email with a visual editor and contact segments.

    Email campaigns, Newsletter publishing, Marketing, SaaS, Newsletters, Self hosters

    2.3k starsOtherUpdated 31 Oct 2026

  31. pentacent/keila

    Self-hosted newsletter tool with a simple editor, sign-up forms and campaign stats.

    Newsletter publishing, Email campaigns, Forms and surveys, Marketing, Media and publishing, Newsletters, Self hosters

    2.3k starsAGPL-3.0Updated 31 Oct 2026

  32. mettle/sendportal

    Self-hosted email marketing app that sends campaigns through SES, Mailgun, SendGrid and others.

    Email campaigns, Newsletter publishing, AWS, Marketing, SaaS, Newsletters, Self hosters

    2.2k starsMITUpdated 22 Oct 2026

  33. FGRibreau/mailchecker

    Cross-language library that detects disposable and throwaway email addresses in sign-up and lead forms.

    Enrichment, Forms and surveys, Sales, Marketing, SaaS

    1.9k starsMITUpdated 26 Oct 2026

  34. mantisbt/mantisbt

    Long-running PHP bug tracker for logging, assigning and following issues through to a fix.

    Helpdesk, Project management, Web, Engineering, Product, SaaS, Self hosters

    1.8k starsUpdated 2 Nov 2026

  35. django-helpdesk/django-helpdesk

    Django app that adds a ticketing helpdesk with email intake to an existing site.

    Helpdesk, Web, Customer support, Engineering

    1.7k starsBSD-3-ClauseUpdated 3 Nov 2026

  36. AfterShip/email-verifier

    Go library that validates email syntax, MX records, SMTP reachability and disposable domains.

    Enrichment, Sales, Engineering, SaaS, E-commerce

    1.7k starsMITUpdated 2 Nov 2026

  37. maizzle/framework

    Framework for building HTML emails with Tailwind CSS and a build step that inlines styles.

    Email campaigns, Marketing, Engineering

    1.6k starsMITUpdated 1 Nov 2026

  38. truemail-rb/truemail

    Ruby email validator using regex, DNS and SMTP checks to clean lead and user lists.

    Enrichment, Sales, Engineering, SaaS

    1.3k starsMITUpdated 16 Oct 2026

  39. faveosuite/faveo-helpdesk

    Laravel ticketing system with SLA, canned replies and a knowledge base.

    Helpdesk, Knowledge base, Web, Customer support, B2B services, Self hosters

    1.3k starsOSL-3.0Updated 3 Nov 2026

  40. bestpractical/rt

    Request Tracker, an enterprise ticketing system for support, IT and operations queues.

    Helpdesk, Web, Customer support, IT and security, Education, Government, Self hosters

    1.2k starsGPL-2.0Updated 3 Nov 2026

  41. chiefonboarding/ChiefOnboarding

    Employee onboarding platform that sends new hires sequenced tasks, intros and resources via Slack or email.

    Onboarding, Web, Slack, HR, Self hosters

    934 starsAGPL-3.0Updated 1 Nov 2026

  42. warmbly/warmbly

    Sends B2B cold email sequences from your own mailboxes and runs warm-up sending to build their reputation.

    Outreach, Email campaigns, Sales, B2B services, Agencies, Self hosters

    882 starsApache-2.0Updated 2 Nov 2026

  43. phpList/phplist3

    Long-running self-hosted mailing list manager for newsletters and bulk email campaigns.

    Newsletter publishing, Email campaigns, Marketing, Nonprofit, Newsletters, Self hosters

    879 starsAGPL-3.0Updated 2 Nov 2026

  44. DjangoCRM/django-crm

    Django-based CRM with deals, tasks, email marketing and analytics for small sales teams.

    CRM, Email campaigns, Analytics dashboards, Web, Sales, B2B services, Self hosters

    650 starsAGPL-3.0Updated 2 Nov 2026

  45. znuny/Znuny

    OTRS-derived ticketing system for customer service and IT service management.

    Helpdesk, Web, Customer support, IT and security, Government, B2B services, Self hosters

    611 starsGPL-3.0Updated 3 Nov 2026

  46. buyukakyuz/email-sleuth

    Rust CLI that guesses and SMTP-verifies professional email addresses from a name and company domain.

    Enrichment, Lead generation, Sales, B2B services

    427 starsMITUpdated 21 Dec 2025

  47. kaymen99/sales-outreach-automation-langgraph

    LangGraph agents that research and qualify leads from a CRM and draft personalised outreach emails.

    Outreach, Enrichment, AI agents, OpenAI, Sales, B2B services, Agencies

    405 starsUpdated 15 Jan 2025