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Open Source Marketing & Customer Engagement Tools

A curated collection of the best open source tools for marketing campaigns, customer communication, and engagement..

See also:Social Media ManagementStars growing over the last 30 daysMarketing AutomationLink Management & ShortenersSEO ToolsStars growing quickly over the last 30 daysAI Visibility TrackingStars growing quickly over the last 30 daysEmail Marketing & NewslettersCustomer Communication Platforms

Postiz

Schedule, analyze, and manage 30+ social media accounts

  • Stars

    Stars growing quickly over the last 30 days41,163

  • Last commit

    5 hours ago

  • License

    AGPL-3.0
Self-hostable social media scheduler that lets you plan, generate, and publish content across 30+ networks with AI assistance, team collaboration, and automation integrations.

Open Source Alternative to:

Post Bridge

Novu

Multi-channel notification infrastructure for apps

  • Stars

    40,306

  • Last commit

    15 hours ago

  • License

    Unknown
Open-source platform for building in-app, email, push, SMS, and chat notifications with a unified API, workflow engine, and embeddable inbox component.

Open Source Alternative to:

Customer.io

OpenSEO

Self-hosted SEO platform for keyword, backlink, and rank tracking

  • Stars

    Stars growing quickly over the last 30 days26,954

  • Last commit

    2 days ago

  • License

    MIT
Manage keyword research, backlink analysis, competitor monitoring, and rank tracking without expensive SaaS subscriptions. Self-hostable, MIT-licensed, uses DataForSEO.

Open Source Alternative to:

Semrush

Ghost

Publishing platform for blogs, newsletters, and paid memberships

  • Stars

    55,716

  • Last commit

    6 hours ago

  • License

    MIT
Publish content, send email newsletters, and sell paid subscriptions from one platform. Used by independent journalists, creators, and businesses like YCombinator and Kickstarter.

Open Source Alternative to:

WordPress

Chatwoot

Omnichannel customer support with a built-in AI assistant

  • Stars

    Stars growing over the last 30 days39,386

  • Last commit

    5 hours ago

  • License

    MIT
Manage customer conversations across live chat, email, WhatsApp, Instagram, and more from one inbox, with an AI assistant that suggests replies and automates common questions.

Open Source Alternative to:

Open

Dub Links

Branded short links with analytics and conversion tracking

  • Stars

    25,144

  • Last commit

    13 days ago

  • License

    AGPL-3.0
Link management platform for marketing teams with custom domains, UTM builder, A/B testing, geo-targeting, QR codes, and real-time conversion analytics.

Open Source Alternative to:

TinyURL

Krayin

Self-hosted CRM for enhanced business relationships

  • Stars

    24,124

  • Last commit

    12 hours ago

  • License

    MIT
Open source customer relationship management platform with sales tracking, marketing automation, and customizable workflows for businesses of all sizes.

Open Source Alternative to:

Salesforce

Listmonk

Self-hosted newsletter and mailing list manager

  • Stars

    24,208

  • Last commit

    2 days ago

  • License

    AGPL-3.0
Send email campaigns and transactional messages to millions of subscribers with a single high-performance binary backed by Postgres.

Open Source Alternative to:

Mailchimp

Billion Mail

AI
Open-source mail server with unlimited sending & AI tools

  • Stars

    16,207

  • Last commit

    5 months ago

  • License

    AGPL-3.0
Self-hosted email marketing platform with unlimited sending, AI-powered email creation, real-time analytics, and no monthly fees. Complete SMTP solution.

Open Source Alternative to:

Resend

Sink

Simple, speedy, and secure link shortener with analytics

  • Stars

    7,260

  • Last commit

    13 days ago

  • License

    AGPL-3.0
A serverless link shortener that runs entirely on Cloudflare, offering URL compression, analytics, and customizable slugs.

Open Source Alternative to:

TinyURL

Mautic

Open source marketing automation for everyone

  • Stars

    10,954

  • Last commit

    23 hours ago

  • License

    Unknown
Mautic is a free and open source marketing automation platform that helps businesses manage leads, create campaigns, and analyze results.

Open Source Alternative to:

HubSpot

Kutt

Simplify your links with this free, modern URL shortener

  • Stars

    11,196

  • Last commit

    21 days ago

  • License

    MIT
Kutt offers a free and open-source solution for shortening URLs, complete with custom domains and detailed analytics.

Open Source Alternative to:

TinyURL

Fonoster

Open-source cloud communications platform for developers

  • Stars

    8,163

  • Last commit

    12 hours ago

  • License

    MIT
Build and deploy powerful voice and messaging applications with ease using Fonoster's flexible, scalable, and developer-friendly platform.

Open Source Alternative to:

Twilio

Plunk

The open-source, affordable email platform

  • Stars

    5,595

  • Last commit

    2 days ago

  • License

    AGPL-3.0
Plunk unifies marketing, transactional, and broadcast emails into a single, complete solution for businesses of all sizes.

Open Source Alternative to:

Resend

useSend

Pay per email sent, not for contact storage

  • Stars

    4,789

  • Last commit

    1 day ago

  • License

    AGPL-3.0
Open source email platform for transactional and marketing emails. Self-host or use cloud service with transparent pricing - pay only for emails sent.

Open Source Alternative to:

Resend

Zammad

Powerful helpdesk solution for streamlined customer service

  • Stars

    6,094

  • Last commit

    5 hours ago

  • License

    AGPL-3.0
Zammad is an open-source helpdesk software that centralizes customer communications and helps deliver great service experiences efficiently.

Open Source Alternative to:

Open

Shlink

The definitive self-hosted URL shortener

  • Stars

    5,414

  • Last commit

    2 days ago

  • License

    MIT
Keep control over all your shortened URLs by serving them under your own domains with this simple yet powerful tool.

Open Source Alternative to:

TinyURL

Freescout

Open-source helpdesk for seamless customer support

  • Stars

    4,652

  • Last commit

    23 hours ago

  • License

    AGPL-3.0
Self-hosted email management system with shared inboxes, automation, and powerful collaboration features for efficient customer support.

Open Source Alternative to:

Intercom

Erxes

Open-source growth platform for customer-centric teams

  • Stars

    4,111

  • Last commit

    5 hours ago

  • License

    AGPL-3.0
All-in-one solution for marketing, sales, and customer service. Boost engagement, streamline workflows, and drive growth.

Open Source Alternative to:

Salesforce

Frappe Helpdesk

Open-source ticketing system for streamlined support

  • Stars

    3,488

  • Last commit

    20 hours ago

  • License

    AGPL-3.0
Frappe Helpdesk consolidates customer issues, automates workflows, and empowers self-service to boost agent productivity and customer satisfaction.

Open Source Alternative to:

Intercom

LinkStack

Your digital identity, beautifully organized

  • Stars

    3,945

  • Last commit

    14 days ago

  • License

    AGPL-3.0
A free, open-source link management platform for creating customizable, self-hosted link pages to showcase your online presence.

Open Source Alternative to:

LinkTree

LittleLink

Create your own link-in-bio page with 100+ branded buttons

  • Stars

    3,125

  • Last commit

    3 months ago

  • License

    MIT
Open source DIY alternative to Linktree with 100+ branded buttons, multiple themes, and optimized performance. No frameworks or JavaScript required.

Open Source Alternative to:

LinkTree

Mixpost

Self-hosted social media management without limits

  • Stars

    Stars growing over the last 30 days3,917

  • Last commit

    8 months ago

  • License

    MIT
Create, schedule, and manage social media content from your own server with no subscription fees or usage restrictions.

Open Source Alternative to:

Post Bridge

Dittofeed

Open-source customer engagement platform for automation

  • Stars

    3,053

  • Last commit

    28 days ago

  • License

    MIT
Dittofeed offers low-code tools for message automation across multiple channels, including powerful segmentation and personalization features.

Open Source Alternative to:

Mailchimp

Chaskiq

Open-source customer communication platform

  • Stars

    3,582

  • Last commit

    4 months ago

  • License

    Unknown
Versatile messaging solution for businesses to engage customers through multiple channels, with AI-powered automation and analytics.

Open Source Alternative to:

Open

Notifuse

Self-hosted email platform with visual editor & analytics

  • Stars

    2,275

  • Last commit

    2 days ago

  • License

    AGPL-3.0
Free open-source email platform for newsletters and transactional emails. Self-hosted alternative to Mailchimp with visual MJML editor, A/B testing, and analytics.

Open Source Alternative to:

Resend

WR.DO

Free DNS management and URL shortening platform

  • Stars

    2,290

  • Last commit

    11 days ago

  • License

    MIT
WR.DO offers free domain name distribution and short URL generation, built on Cloudflare's infrastructure for reliability and speed.

Open Source Alternative to:

TinyURL

MailCheap

Open-source newsletter app billed by emails sent

  • Stars

    Stars growing quickly over the last 30 days1,663

  • Last commit

    3 days ago

  • License

    AGPL-3.0
Newsletter platform billed by emails sent, not list size, with scheduling, a public website, AI agent access and deliverability tools from $19 a month.

Open Source Alternative to:

Mailchimp

Sendportal

Self-hosted email marketing with unlimited everything

  • Stars

    2,190

  • Last commit

    18 days ago

  • License

    MIT
Open-source email marketing platform offering unlimited subscribers, campaigns, and workspaces. Self-hosted solution with powerful API and beautiful interface.

Open Source Alternative to:

Mailchimp

Keila

Open-source email marketing for the privacy-conscious

  • Stars

    2,260

  • Last commit

    5 days ago

  • License

    AGPL-3.0
Self-hosted newsletter platform with powerful features, data protection, and full control over your mailing lists and campaigns.

Open Source Alternative to:

Mailchimp

TryPost

Schedule posts to every major social network, self-hosted

  • Stars

    Stars growing quickly over the last 30 days834

  • Last commit

    12 hours ago

  • License

    AGPL-3.0
Plan, schedule, and auto-publish social media content across 10+ networks with a visual calendar, AI captions, team approvals, and self-hosting support.

Open Source Alternative to:

Post Bridge

Linky

A delightfully rich and dynamic link-in-bio.

  • Stars

    799

  • Last commit

    20 days ago

  • License

    MIT
Build a dynamic link-in-bio page with a drag-and-drop editor. Integrate platforms to showcase live content and connect with your audience.

Open Source Alternative to:

LinkTree

Cossistant

AI
AI-native support infrastructure for modern SaaS

  • Stars

    739

  • Last commit

    2 months ago

  • License

    AGPL-3.0
Open-source support platform combining AI and human agents. React components with shadcn/ui design philosophy, styled with Tailwind CSS for NextJS apps.

Open Source Alternative to:

Open

Elmo

AI
Self-hosted AI visibility tracking for your brand

  • Stars

    Stars growing quickly over the last 30 days579

  • Last commit

    2 days ago

  • License

    MIT
Tracks how ChatGPT, Gemini, Claude, Perplexity, and other AI engines mention your brand, which competitors appear, and which sources get cited.

Open Source Alternative to:

Otterly.AI

Contentport

Your content engine for growing on Twitter at scale

  • Stars

    773

  • Last commit

    11 months ago

  • License

    AGPL-3.0
Create, schedule & manage Twitter content at scale with AI assistance, beautiful visuals, and multi-account support. Perfect for busy founders.

Open Source Alternative to:

Post Bridge

Ansvisor

AI
Track and improve your brand's visibility in AI search

  • Stars

    Stars growing quickly over the last 30 days234

  • Last commit

    15 hours ago

  • License

    MIT
Monitors how your brand appears across ChatGPT, Perplexity, Google AI Overviews, and other AI platforms, then turns those insights into prioritized content and optimization actions.

Open Source Alternative to:

Otterly.AI

Notra

AI
Track your brand's visibility across AI answer engines

  • Stars

    Stars growing over the last 30 days270

  • Last commit

    25 days ago

  • License

    AGPL-3.0
GEO tool that queries ChatGPT, Claude, Gemini, and Perplexity with your buyers' questions, then shows you who gets recommended and how to close the gap.

Open Source Alternative to:

Otterly.AI

Lua.sh

Professional link management for modern teams

  • Stars

    344

  • Last commit

    2 months ago

  • License

    AGPL-3.0
Open-source platform for creating shortened URLs with advanced analytics, custom domains, and API integration for marketing and development teams.

Open Source Alternative to:

TinyURL

OneGlanse

AI
Track your brand's presence in AI-generated answers

  • Stars

    Stars growing quickly over the last 30 days253

  • Last commit

    1 month ago

  • License

    MIT
Runs prompts through ChatGPT, Perplexity, Gemini, Claude, and Google AI Overview interfaces via browser automation, then analyzes captured responses and citations with a model endpoint you configure.

Open Source Alternative to:

Otterly.AI

Canonry

AI
Track and improve your brand's visibility in AI answers

  • Stars

    Stars growing quickly over the last 30 days205

  • Last commit

    9 hours ago

  • License

    MIT
Tracks how often AI tools like ChatGPT, Claude, and Perplexity mention or cite your brand, then fixes the gaps through AEO strategy and content work.

Open Source Alternative to:

Profound

Slugy

Transform long URLs into beautiful, trackable short links

  • Stars

    95

  • Last commit

    28 days ago

  • License

    MIT
Open-source URL shortener with analytics, custom domains, QR codes, and link-in-bio pages. Create branded short links with detailed tracking insights.

Open Source Alternative to:

TinyURL

Wraps

Code-first email platform that deploys to your AWS

  • Stars

    67

  • Last commit

    2 days ago

  • License

    AGPL-3.0
Build email templates as React components and automations in TypeScript. Deploy to your AWS account with SES integration. Marketing teams edit content without code.

Open Source Alternative to:

Resend
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