Awesome-Selfhosted

   

Self-hosting is the practice of hosting and managing applications on your own server(s) instead of consuming from SaaSS providers.

This is a list of Free Software network services and web applications which can be hosted on your own server(s). Non-Free software is listed on the Non-Free page.

HTML version (recommended), Markdown version (legacy).

See Contributing.

Table of contents

• Software
• Analytics
• Archiving and Digital Preservation (DP)
• Automation
• Backup
• Blogging Platforms
• Booking and Scheduling
• Bookmarks and Link Sharing
• Calendar & Contacts
• Communication - Custom Communication Systems
• Communication - Email - Complete Solutions
• Communication - Email - Mail Delivery Agents
• Communication - Email - Mail Transfer Agents
• Communication - Email - Mailing Lists and Newsletters
• Communication - Email - Webmail Clients
• Communication - IRC
• Communication - SIP
• Communication - Social Networks and Forums
• Communication - Video Conferencing
• Communication - XMPP - Servers
• Communication - XMPP - Web Clients
• Community-Supported Agriculture (CSA)
• Conference Management
• Content Management Systems (CMS)
• Customer Relationship Management (CRM)
• Database Management
• DNS
• Document Management
• Document Management - E-books
• Document Management - Institutional Repository and Digital Library Software
• Document Management - Integrated Library Systems (ILS)
• E-commerce
• Federated Identity & Authentication
• Feed Readers
• File Transfer & Synchronization
• File Transfer - Distributed Filesystems
• File Transfer - Object Storage & File Servers
• File Transfer - Peer-to-peer Filesharing
• File Transfer - Single-click & Drag-n-drop Upload
• File Transfer - Web-based File Managers
• Games
• Games - Administrative Utilities & Control Panels
• Genealogy
• Generative Artificial Intelligence (GenAI)
• Groupware
• Health and Fitness
• Human Resources Management (HRM)
• Identity Management
• Internet of Things (IoT)
• Inventory Management
• Knowledge Management Tools
• Learning and Courses
• Manufacturing
• Maps and Global Positioning System (GPS)
• Media Management
• Media Streaming
• Media Streaming - Audio Streaming
• Media Streaming - Multimedia Streaming
• Media Streaming - Video Streaming
• Miscellaneous
• Money, Budgeting & Management
• Monitoring & Status Pages
• Network Utilities
• Note-taking & Editors
• Office Suites
• Password Managers
• Pastebins
• Personal Dashboards
• Photo Galleries
• Polls and Events
• Proxy
• Recipe Management
• Remote Access
• Resource Planning
• Search Engines
• Self-hosting Solutions
• Software Development
• Software Development - API Management
• Software Development - Continuous Integration & Deployment
• Software Development - FaaS & Serverless
• Software Development - Feature Toggle
• Software Development - IDE & Tools
• Software Development - Localization
• Software Development - Low Code
• Software Development - Project Management
• Software Development - Testing
• Static Site Generators
• Task Management & To-do Lists
• Ticketing
• Time Tracking
• Travel Organization
• URL Shorteners
• Video Surveillance
• VPN
• Web Servers
• Wikis
• List of Licenses
• Anti-features
• External Links
• Contributing
• License

Software

Analytics

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Analytics is the systematic computational analysis of data or statistics. It is used for the discovery, interpretation, and communication of meaningful patterns in data.

_Related: Database Management, Personal Dashboards_

• ANALOG - A minimal analytics tool. Tracks events in a span of 10-30 days. MIT Nodejs/Docker
• Aptabase - Privacy first and simple analytics for mobile and desktop apps. (Source Code) AGPL-3.0 Docker
• AWStats - Generate statistics from web, streaming, ftp or mail server logfiles. (Demo, Source Code) GPL-3.0 Perl
• Countly Community Edition - Real time mobile and web analytics, crash reporting and push notifications platform. (Source Code) AGPL-3.0 Nodejs/Docker
• d8a.tech - A data collection service that works with your existing Google Analytics setup to capture user activity and send it straight to your own private database. (Demo, Source Code) MIT Go/Docker
• Daily Stars Explorer ⚠ - Track GitHub repo trends with daily star insights to see growth and community interest over time. (Demo, Source Code) MIT Go/Nodejs/Docker
• Druid - Distributed, column-oriented, real-time analytics data store. (Source Code) Apache-2.0 Java/Docker
• EDA - Web application for data analysis and visualization. AGPL-3.0 Nodejs/Docker
• GoAccess - Real-time web log analyzer and interactive viewer that runs in a terminal. (Source Code) GPL-2.0 C
• GoatCounter - Easy web statistics without tracking of personal data. (Source Code) EUPL-1.2 Go
• HitKeep - Privacy-first web analytics with goals, funnels, ecommerce tracking, and team management in a single binary with embedded DuckDB (alternative to Google Analytics, Plausible, Umami). (Source Code) MIT Go/Docker
• Litlyx - All-in-one Analytics Solution. Setup in 30 seconds. Display all your data on an AI-powered dashboard. Fully self-hostable and GDPR compliant. (Source Code) Apache-2.0 Docker
• Liwan - Privacy-first web analytics. (Demo, Source Code) Apache-2.0 Rust/Docker
• Matomo - Web analytics that protects your data and your customers' privacy (alternative to Google Analytics). (Source Code) GPL-3.0 PHP
• Medama Analytics - Privacy-first website analytics. Tiny, simple, and cookie-free. (Demo, Source Code) Apache-2.0/MIT Docker/Go
• Metabase - Easy way for everyone in your company to ask questions and learn from data. (Source Code) AGPL-3.0 Java/Docker
• Middleware - Tool designed to help engineering leaders measure and analyze the effectiveness of their teams using the DORA metrics. (Source Code) Apache-2.0 Docker/Python/Nodejs
• Netron - Visualizer for neural network and machine learning models. (Source Code) MIT Python/Nodejs
• Offen - Fair, lightweight and open web analytics tool. Gain insights while your users have full access to their data. (Demo, Source Code) Apache-2.0 Go/Docker
• Plausible Analytics - Simple, lightweight (< 1 KB) and privacy-friendly web analytics. (Source Code) AGPL-3.0 Elixir
• PostHog - Product analytics, session recording, feature flagging and a/b testing that you can self-host (alternative to Mixpanel, Amplitude, Heap, HotJar, Optimizely). (Source Code) MIT Python
• Postiz ⚠ - Schedule posts, track the performance of your content, and manage all your social media accounts in one place (Alternative to Buffer, Hootsuite, Sprout Social). (Source Code) AGPL-3.0 Docker
• Prisme Analytics - Privacy-focused and progressive analytics service based on Grafana. (Source Code) AGPL-3.0/MIT Docker
• Redash - Connect and query your data sources, build dashboards to visualize data and share them with your company. (Source Code) BSD-2-Clause Docker
• Rybbit - Web and products analytics that is easy to setup and more intuitive (alternative to Google Analytics). (Demo, Source Code) AGPL-3.0 Docker
• Shaper - Build Data Dashboards all in SQL. Powered by DuckDB. (Demo, Source Code) MPL-2.0 Docker/Nodejs/Python/Go
• Socioboard ⚠ - Social media management, analytics, and reporting platform supporting nine social media networks out-of-the-box. GPL-3.0 Nodejs
• Statistics for Strava ⚠ - Statistics dashboard generated from Strava data. (Demo) AGPL-3.0 Docker
• Superset - Modern data exploration and visualization platform. (Source Code) Apache-2.0 Python
• Swetrix - Ultimate, open-source web analytics to satisfy all your needs. (Demo, Source Code) AGPL-3.0 Docker
• Umami - Simple, fast, privacy-focused alternative to Google Analytics. (Demo, Source Code) MIT Nodejs/Docker
• Vince - Web analytics and dashboard (alternative to Google Analytics). (Source Code) AGPL-3.0 Go/Docker/K8S/deb

Archiving and Digital Preservation (DP)

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Digital archiving and preservation software.

_Related: Backup, Content Management Systems (CMS)_

_See also: awesome-web-archiving_

• ArchiveBox - Create HTML & screenshot archives of sites from your bookmarks, browsing history, RSS feeds, or other sources (alternative to Wayback Machine). (Demo, Source Code) MIT Python/Docker
• ArchivesSpace - Archives information management application for managing and providing Web access to archives, manuscripts and digital objects. (Demo, Source Code) ECL-2.0 Ruby
• Bichon - Email archiving server that syncs from IMAP accounts, indexes emails for full-text search, and provides a REST API. No external database required, includes WebUI with multi-account support. AGPL-3.0 Rust/Docker
• bitmagnet - BitTorrent indexer, DHT crawler, content classifier and torrent search engine with web UI, GraphQL API and Servarr stack integration. (Source Code) MIT Go/Docker
• CKAN - Make open data websites. (Source Code) AGPL-3.0 Python
• Collective Access - Providence - Highly configurable Web-based framework for management, description, and discovery of digital and physical collections supporting a variety of metadata standards, data types, and media formats. (Source Code) GPL-3.0 PHP
• Eonvelope - Email archiving software that allows you to preserve your emails for an indefinite long period of time. (Source Code) AGPL-3.0 K8S/Docker
• Ganymede ⚠ - Twitch VOD and live stream archiving platform. Includes a rendered chat for each archive. GPL-3.0 Docker
• mail-archiver - Web application for archiving, searching, and exporting emails from multiple accounts (IMAP, M365 or Import). Featuring folder sync, attachment support, mailbox migration and a dashboard. GPL-3.0 Docker
• Omeka S - Next-generation web publishing platform for institutions interested in connecting digital cultural heritage collections with other resources online. (Source Code) GPL-3.0 Nodejs
• Open Archiver - Email archiving solution with full-text search and eDiscovery search features. (Demo, Source Code) AGPL-3.0 Docker
• Piler - Feature-rich email archiving solution. (Source Code) GPL-3.0 C/Docker/deb
• Wallabag - Wallabag, formerly Poche, is a web application allowing you to save articles to read them later with improved readability. (Source Code) MIT PHP
• Wayback - A self-hosted toolkit for archiving webpages to the Internet Archive, archive.today, IPFS, and local file systems. GPL-3.0 Go

Automation

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Automation software designed to reduce human intervention in processes.

_Related: Internet of Things (IoT), Software Development - Continuous Integration & Deployment, Media Management_

• Activepieces - No-code business automation tool like Zapier or Tray. For example, you can send a Slack notification for each new Trello card. (Source Code) MIT Docker
• Apache Airflow - Platform to programmatically author, schedule, and monitor workflows. (Source Code) Apache-2.0 Python/Docker
• Automatisch - Business automation tool that lets you connect different services like Twitter, Slack, and more to automate your business processes (alternative to Zapier). (Source Code) AGPL-3.0 Docker
• BookBounty ⚠ - Retrieve missing Readarr books from Library Genesis. MPL-2.0 Docker
• changedetection.io - Stay up-to-date with web-site content changes. (Source Code) Apache-2.0 Python/Docker
• ChiefOnboarding - Employee onboarding platform that allows you to provision user accounts and create sequences with todo items, resources, text/email/Slack messages, and more! Available as a web portal and Slack bot. (Source Code) AGPL-3.0 Docker
• Cronicle - Simple, distributed task scheduler and runner with a web based UI. (Source Code) MIT Nodejs
• Cronmaster - Cronjob management UI with human readable syntax, live logging and log history for your cronjobs. AGPL-3.0 Docker
• Dagu - Powerful Cron alternative with a Web UI. It allows you to define dependencies between commands as a Directed Acyclic Graph (DAG) in a declarative YAML format. (Source Code) GPL-3.0 Go/Docker
• Discount Bandit ⚠ - Track pricing, stock status of products across multiple stores such as Amazon, Ebay, Walmart, etc. (Source Code) GPL-3.0 PHP/Docker
• Dittofeed - Omni-channel customer engagement and messaging automation platform (alternative to Braze, Customer.io, Iterable). (Demo, Source Code) MIT Docker
• feedmixer - Micro web service which takes a list of feed URLs and returns a new feed consisting of the most recent n entries from each given feed (returns Atom, RSS, or JSON). (Demo) WTFPL Python
• flowctl - Self-service workflow execution platform with approvals, remote execution and scheduling. (Demo, Source Code) Apache-2.0 Go/Docker
• Fredy ⚠ - Searches for new apartments, houses, and flats in Germany on platforms like ImmoScout24, Immowelt, and others, and instantly delivers the results to you via Slack, Telegram, and more. (Demo, Source Code) Apache-2.0 Nodejs/Docker
• gocron - Task scheduler that allows users to specify recurring jobs via a simple YAML configuration file. MIT Docker
• HandBrake Web - Use one or more instances of HandBrake video transcoder on a headless device via a web interface. AGPL-3.0 Docker
• Healthchecks - Listen for pings and sends alerts when pings are late. (Source Code) BSD-3-Clause Python/Docker
• HomeButler - Homelab management tool for monitoring hosts, Docker services, Wake-on-LAN, inventory, and remote operations, with a web dashboard and MCP integrations. (Source Code) MIT Docker/Go
• Huginn - Build agents that monitor and act on your behalf. MIT Ruby
• Kestra - Event-driven, language-agnostic platform to create, schedule, and monitor workflows. In code. Coordinate data pipelines and tasks such as ETL and ELT. (Source Code) Apache-2.0 Docker
• Kibitzr - Lightweight personal web assistant with powerful integrations. (Source Code) MIT Python
• LazyLibrarian ⚠ - Follow authors and grab metadata for all your digital reading needs. It uses a combination of Goodreads, Librarything and optionally GoogleBooks as sources for author info and book info. GPL-3.0 Python
• Leon - Personal assistant who can live on your server. (Source Code) MIT Nodejs
• Matchering - Automated music mastering (alternative to LANDR, eMastered and MajorDecibel). GPL-3.0 Docker
• Mylar3 - Automated Comic Book (cbr/cbz) downloader program for use with NZB and torrents. (Source Code) GPL-3.0 Python/Docker
• OliveTin - Web interface for running Linux shell commands. (Source Code) AGPL-3.0 Go
• pyLoad - Lightweight, customizable and remotely manageable downloader for 1-click-hosting sites like rapidshare.com or uploaded.to. (Source Code) AGPL-3.0 Python
• StackStorm - StackStorm (aka _IFTTT for Ops_) is event-driven automation for auto-remediation, security responses, troubleshooting, deployments, and more. Includes rules engine, workflow, 160 integration packs with 6000+ actions and ChatOps. (Source Code) Apache-2.0 Python
• µTask - Automation engine that models and executes business processes declared in yaml. BSD-3-Clause Go/Docker

Backup

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Backup software.

Please visit awesome-sysadmin/Backups

_Related: Archiving and Digital Preservation (DP)_

Blogging Platforms

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A blog is a discussion or informational website consisting of discrete, diary-style text entries (posts).

_Related: Static Site Generators, Content Management Systems (CMS)_

_See also: WeblogMatrix_

• Antville - Free, open source project aimed at the development of a high performance, feature rich weblog hosting software. (Source Code) Apache-2.0 Javascript
• Castopod - Podcast management hosting platform that includes the latest podcast 2.0 standards, an automated Fediverse feed, analytics, an embeddable player, and more. (Source Code) AGPL-3.0 PHP/Docker
• Chyrp Lite - Extra-awesome, extra-lightweight blog engine. (Source Code) BSD-3-Clause PHP
• Dotclear - Take control over your blog. GPL-2.0 PHP
• Ech0 - Lightweight federated publishing platform focused on personal idea sharing (documentation in Chinese). (Demo, Source Code) AGPL-3.0 Docker/K8S
• FlatPress - A lightweight, easy-to-set-up flat-file blogging engine. (Source Code) GPL-2.0 PHP
• fx - Micro-blog tool offering built-in syntax highlighting, mobile publishing and more (alternative to Twitter, Bluesky). MIT Docker
• Ghost - Just a blogging platform. (Source Code) MIT Nodejs
• Haven - Private blogging system with markdown editing and built in RSS reader. (Demo, Source Code) MIT Ruby
• HTMLy - Databaseless PHP blogging platform. A flat-file CMS that allows you to create a fast, secure, and powerful website or blog in seconds. (Demo, Source Code) GPL-2.0 PHP
• Known - Collaborative social publishing platform. (Source Code) Apache-2.0 PHP
• Mataroa - Naked blogging platform for minimalists. (Source Code) MIT Python
• PluXml - XML-based blog/CMS platform. (Source Code) GPL-3.0 PHP
• Serendipity - Serendipity (s9y) is a highly extensible and customizable PHP blog engine using Smarty templating. (Source Code) BSD-3-Clause PHP
• WriteFreely - Writing software for starting a minimalist, federated blog — or an entire community. (Source Code) AGPL-3.0 Go

Booking and Scheduling

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Event scheduling, reservation, and appointment management software.

_Related: Polls and Events, Groupware_

• Alf.io - Ticket reservation system. (Demo, Source Code) GPL-3.0 Java
• Cal.diy - Online appointment scheduling system. (Source Code) MIT Nodejs
• Easy!Appointments - Allows your customers to book appointments with you via the web. (Demo, Source Code) GPL-3.0 PHP
• Hi.Events - Event management and ticketing platform for conferences, concerts, and more. Offering customizable event pages and embeddable ticket widgets. (Demo, Source Code) AGPL-3.0 Docker
• LibreBooking - Resource scheduling solution offering a flexible, mobile-friendly, and extensible interface for organizations to manage resource reservations. (Demo, Source Code) GPL-3.0 PHP/Docker
• QloApps - Customizable and intuitive web-based hotel reservation system and a booking engine. (Demo, Source Code) OSL-3.0 PHP/Nodejs
• Rallly - Create polls to vote on dates and times (alternative to Doodle). (Demo, Source Code) AGPL-3.0 Nodejs/Docker
• Seatsurfing - Webbased app to book seats, desks and rooms for offices. (Source Code) GPL-3.0 Docker

Bookmarks and Link Sharing

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Software which allows users to add, annotate, edit, and share bookmarks) of web documents.

_Related: Personal Dashboards_

• Betula - Single-user federated bookmark manager with Fediverse support and archives. (Source Code) AGPL-3.0 Go
• Buku - Powerful bookmark manager and a personal textual mini-web. GPL-3.0 Python/deb
• Digibunch - Create bunches of links to share with your learners or colleagues. (Demo, Source Code) AGPL-3.0 Nodejs/PHP
• Espial - An open-source, web-based bookmarking server. AGPL-3.0 Haskell
• Faved - Handcrafted bookmark manager combining powerful tagging, instant search, and a clean, distraction-free interface. Built for large collections and advanced workflows, optimized for efficiency and ease-of-use. (Demo, Source Code) MIT Docker
• Firefox Account Server - Host your own Firefox accounts server. (Source Code) MPL-2.0 Nodejs/Java
• Karakeep - Bookmark-everything app with a touch of AI for the data hoarders out there. (Demo, Source Code) AGPL-3.0 Docker
• LinkAce - Bookmark archive with automatic backups to the Internet Archive, link monitoring, and a full REST API. Installation is done via Docker, or as a simple PHP application. (Demo, Source Code) GPL-3.0 Docker/PHP
• linkding - Minimal bookmark management with a fast and clean UI. Simple installation through Docker and can run on your Raspberry Pi. (Demo, Source Code) MIT Docker
• LinkWarden - Bookmark and archive manager to store your useful links. (Source Code) MIT Docker/Nodejs
• NeonLink - Bookmark service with unique design and simple installation with Docker. MIT Docker
• Readeck - Save the precious readable content of web pages you like and want to keep forever. See it as a bookmark manager and a read later tool. (Source Code, Clients) AGPL-3.0 Go/Docker
• Servas - A self-hosted bookmark management tool. It allows organization with tags, groups, and a list specifically for later access. It supports multiple users with 2FA. Companion browser extensions are available for Firefox and Chrome. (Clients) GPL-3.0 Docker/Nodejs/PHP
• Shaarli - Personal, minimalist, super-fast, no-database bookmarking and link sharing platform. (Demo) Zlib PHP/deb
• Shiori - Simple bookmark manager built with Go. MIT Go/Docker
• Slash - An open source, self-hosted bookmarks and link sharing platform. GPL-3.0 Docker
• SyncMarks - Sync and manage your browser bookmarks from Edge, Firefox and Chromium. (Clients) AGPL-3.0 PHP

Calendar & Contacts

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CalDAV and CardDAV protocol servers and web clients/interfaces for Electronic calendar, address book and contact management.

_Related: Groupware_

• Baïkal - Lightweight CalDAV and CardDAV server based on sabre/dav. (Source Code) GPL-3.0 PHP
• DAViCal - Server for calendar sharing (CalDAV) that uses a PostgreSQL database as a data store. (Source Code) GPL-2.0 PHP/deb
• Davis - A simple, dockerizable and fully translatable admin interface for sabre/dav based on Symfony 5 and Bootstrap 4, largely inspired by Baïkal. MIT PHP
• Keeper.sh - Calendar syncing tool that pulls and pushes events between calendar sources and destinations via iCal/ICS or OAuth, with support for anonymized busy/free events. (Source Code) AGPL-3.0 Docker
• Manage My Damn Life - Manage my Damn Life (MMDL) is a self-hosted front end for managing your CalDAV tasks and calendars. (Source Code) GPL-3.0 Nodejs/Docker
• Radicale - Simple calendar and contact server with extremely low administrative overhead. (Source Code) GPL-3.0 Python/deb
• SabreDAV - Open source CardDAV, CalDAV, and WebDAV framework and server. (Source Code) MIT PHP
• Xandikos - Open source CardDAV and CalDAV server with minimal administrative overhead, backed by a Git repository. GPL-3.0 Python/deb

Communication - Custom Communication Systems

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Communication software used to provide remote access to systems and exchange files and messages in text, audio and/or video formats between different computers or users, using their own custom protocols.

• AnyCable - Realtime server for reliable two-way communication over WebSockets, Server-sent events, etc. (Demo, Source Code) MIT Go/Docker
• Apprise - Apprise allows you to send a notification to almost all of the most popular notification services available to us today such as: Telegram, Discord, Slack, Amazon SNS, Gotify, etc. MIT Python/Docker/deb
• Centrifugo - Language-agnostic real-time messaging (Websocket or SockJS) server. (Demo, Source Code) MIT Go/Docker/K8S
• Chitchatter - Peer-to-peer chat app that is serverless, decentralized, and ephemeral. (Source Code) GPL-2.0 Nodejs
• Conduit - A simple, fast, and reliable chat server powered by Matrix. (Source Code) Apache-2.0 Rust
• Continuwuity - Community-driven Matrix homeserver, the continuation of conduwuit focusing on user experience and new features (fork of Conduit). (Source Code) Apache-2.0 Rust/Docker/K8S/deb
• Databag - Federated, end-to-end encrypted messaging service for the web, iOS, and Android, supporting text, photos, video, and WebRTC video and audio calls. (Demo) Apache-2.0 Docker
• Element - Fully-featured Matrix client for Web, iOS & Android. (Source Code) Apache-2.0 Nodejs
• GlobaLeaks - Whistleblowing software enabling anyone to easily set up and maintain a secure reporting platform. (Demo, Source Code) AGPL-3.0 Python/deb/Docker
• GNUnet - Software framework for decentralized, peer-to-peer networking. (Source Code) GPL-3.0 C
• Gotify - Notification server with Android and CLI clients (alternative to PushBullet). (Source Code, Clients) MIT Go/Docker
• Hyphanet - Anonymously share files, browse and publish _freesites_ (web sites accessible only through Hyphanet) and chat on forums. (Source Code) GPL-2.0 Java
• Jami - Universal communication platform which preserves the user's privacy and freedoms. (Source Code) GPL-3.0 C++
• Live Helper Chat - Live Support chat for your website. (Source Code) Apache-2.0 PHP
• Mumble - Low-latency, high quality voice/text chat software. (Source Code, Clients) BSD-3-Clause C++/deb
• Notifo - Multichannel notification server with support for Email, Mobile Push, Web Push, SMS, messaging and a javascript plugin. MIT C#
• Novu - Notification infrastructure for developers. (Source Code) MIT Docker/Nodejs
• ntfy - Push notifications to phone or desktop using HTTP PUT/POST, with Android app, CLI and web app, similar to Pushover and Gotify. (Demo, Source Code, Clients) Apache-2.0/GPL-2.0 Go/Docker/K8S
• One Time Secret - Share sensitive information securely with self-destructing links that are only viewable once. (Demo, Source Code) MIT Docker/Ruby/Nodejs
• OTS - One-Time-Secret sharing platform with a symmetric 256bit AES encryption in the browser. (Source Code) Apache-2.0 Go
• PushBits - Notification server for relaying push notifications via Matrix, similar to PushBullet and Gotify. ISC Go
• RetroShare - Secured and decentralized communication system. Offers decentralized chat, forums, messaging, file transfer. (Source Code) GPL-2.0 C++
• Rocket.Chat - Communications platform that puts data protection first (alternative to Gitter.im and Slack). (Source Code) MIT Nodejs/Docker/K8S
• SAMA - Next-Gen self-hosted chat server and clients. (Demo, Source Code, Clients) GPL-3.0 Nodejs/Docker
• Screego - Screego is a simple tool to quickly share your screen to one or multiple people via web browser. (Demo, Source Code) GPL-3.0 Docker/Go
• Shhh - Keep secrets out of emails or chat logs, share them using secure links with passphrase and expiration dates. MIT Python
• SimpleX Chat - The most private and secure chat and applications platform - now with double ratchet E2E encryption. AGPL-3.0 Haskell
• Spectrum 2 - Spectrum 2 is an open source instant messaging transport. It allows users to chat together even when they are using different IM networks. (Source Code) GPL-3.0 C++
• Stoat - Stoat is a user-first chat platform built with modern web technologies. (Source Code) AGPL-3.0/MIT Rust
• Synapse - Server for Matrix, an open standard for decentralized persistent communication. (Source Code) Apache-2.0 Python/deb
• Tiledesk - All-in-one customer engagement platform from lead-gen to post-sales, from WhatsApp to your website. With omni-channel live agents and AI-powered chatbots (alternative to Intercom, Zendesk, Tawk.to and Tidio). (Source Code) MIT Docker/K8S
• Tinode - Instant messaging platform. Backend in Go. Clients: Swift iOS, Java Android, JS webapp, scriptable command line; chatbots. (Demo, Source Code, Clients) GPL-3.0 Go
• Tox - Distributed, secure messenger with audio and video chat capabilities. (Source Code) GPL-3.0 C
• Tuwunel - High-performance and feature-rich chat server for Matrix, and the successor to conduwuit (fork of Conduit). (Demo, Source Code) Apache-2.0 deb/Docker/Nix/Rust
• Typebot - Conversational app builder (alternative to Typeform and Landbot). (Source Code) AGPL-3.0 Docker
• WBO - Web Whiteboard to collaborate in real-time on schemas, drawings, and notes. (Demo) AGPL-3.0 Nodejs/Docker
• Zulip - Zulip is a powerful, open source group chat application. (Source Code) Apache-2.0 Python

Communication - Email - Complete Solutions

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Simple deployment of E-mail servers, e.g. for inexperienced or impatient admins.

• AnonAddy - Email forwarding service for creating aliases. (Source Code) MIT PHP/Docker
• b1gMail - Complete email solution that runs on any webspace with PHP and MariaDB. It supports POP3 catchall mailboxes and can also integrate with Postfix or b1gMailServer if you're running your own server. (Source Code, Clients) GPL-2.0 PHP
• DebOps - Your Debian-based data center in a box. A set of general-purpose Ansible roles that can be used to manage Debian or Ubuntu hosts. (Source Code) GPL-3.0 Ansible/Python
• docker-mailserver - Production-ready fullstack but simple mail server (SMTP, IMAP, LDAP, Antispam, Antivirus, etc.) running inside a container. Only configuration files, no SQL database. (Source Code) MIT Docker
• Dovel - SMTP server that sends and receives emails according to a simple configuration file, with an optional web interface that you can use to browse your emails. (Source Code) LGPL-3.0 Go
• Inboxen - Lets you have an infinite number of unique inboxes. (Source Code) GPL-3.0 Python
• iRedMail - Full-featured mail server solution based on Postfix and Dovecot. (Source Code) GPL-3.0 Shell
• Maddy Mail Server - All-in-one mail server that implements SMTP (both MTA and MX) and IMAP. Replaces Postfix, Dovecot, OpenDKIM, OpenSPF, OpenDMARC with single daemon. (Source Code) GPL-3.0 Go
• Mail-in-a-Box - Turns any Ubuntu server into a fully functional mail server with one command. (Source Code) CC0-1.0 Shell
• Mailcow - Mail server suite based on Dovecot, Postfix and other open source software, that provides a modern Web UI for administration. (Source Code) GPL-3.0 Docker/PHP
• Mailu - Simple yet full-featured mail server as a set of Docker images. (Source Code) MIT Docker/Python
• Modoboa - Mail hosting and management platform including a modern and simplified web user interface. (Source Code) ISC Python
• Mox - Complete e-mail solution with IMAP4, SMTP, SPF, DKIM, DMARC, MTA-STS, DANE and DNSSEC, reputation-based and content-based junk filtering, Internationalization (IDNA), automatic TLS with ACME and Let's Encrypt, account autoconfiguration, and webmail. (Source Code) MIT Go
• Postal - Complete and fully featured mail server for use by websites & web servers. (Source Code) MIT Docker/Ruby
• Simple NixOS Mailserver - Complete mailserver solution leveraging the Nix Ecosystem. GPL-3.0 Nix
• SimpleLogin - Open source email alias solution to protect your email address. Comes with browser extensions and mobile apps. (Source Code) MIT Docker/Python
• Stalwart Mail Server - All-in-one