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Self-Hosted Chat, Email, and Social Platforms
Own your conversations. Matrix and team chat servers, full mail stacks, video conferencing, forums, and federated social platforms, all running on infrastructure that cannot change its terms of service on you.
54 apps in this category
AnonAddy: Anonymous e-mail forwarding Anonymous e-mail forwarding.
Apache Answer: Q&A platform for teams and communities Q&A platform for teams and communities.
Apprise: Push notifications that work with just about every Push notifications that work with just about every platform.
BigBlueButton: Complete open-source web conferencing system Complete open-source web conferencing system.
Chirpy: Privacy-friendly and customizable commenting Privacy-friendly and customizable commenting system.
Commento: Fast, privacy-focused commenting platform Fast, privacy-focused commenting platform.
Continuwuity: A Community Matrix Homeserver in Rust The community-driven continuation of the archived conduwuit Matrix server: lightweight, fast, written in Rust with RocksDB, and a drop-in replacement for conduwuit. A low-resource alternative to Synapse.
Converse: Web-based XMPP/Jabber chat client Web-based XMPP/Jabber chat client.
Discourse: Platform for community discussion A platform for community discussion.
Dittofeed: Omni-channel customer engagement platform for messaging users across multiple channels Omni-channel customer engagement platform for messaging users across multiple channels.
docker-mailserver: A Full Mail Server in One Container, Configured by Files A production-ready mail server container with Postfix, Dovecot, Rspamd, SpamAssassin, ClamAV, Fail2ban, and DKIM, managed through configuration files and a setup script rather than a web UI. MIT licensed.
Dovecot: Secure IMAP mail server Secure IMAP mail server.
Element: The Flagship Matrix Client You Can Self-Host Element Web is the main web client for the Matrix chat network, with end-to-end encrypted rooms, spaces, voice and video calls, and bridges. Self-host it as static files pointed at your own homeserver. AGPL-3.0 or GPL-3.0.
Endless: Social media curator Social media curator.
Feedbase: Open-source solution for collecting feedback and communicating updates Open-source solution for collecting feedback and communicating updates.
Flarum: Simple forum software for building great Simple forum software for building great communities.
Gotify: Simple server for sending and receiving messages Simple server for sending and receiving messages in real-time via WebSocket.
GoToSocial: Fast, fun, small ActivityPub server Fast, fun, small ActivityPub server.
HumHub: Open-source enterprise social network, knowledge Open-source enterprise social network, knowledge database, intranet, and communication platform.
Jitsi Meet: Secure, simple, and scalable video conferences as a standalone or web application Secure, simple, and scalable video conferences as a standalone or web application.
kbin: Reddit-like content aggregator and microblogging A reddit-like content aggregator and microblogging platform for the Fediverse.
Keila: Open-source newsletter tool Open-source newsletter tool.
Ktistec: Single-User ActivityPub Server A self-contained single-user ActivityPub server for participating in the fediverse from your own domain, with no external dependencies beyond a database.
Lemmy: Link aggregator and forum for the Fediverse Link aggregator and forum for the Fediverse.
listmonk: Standalone, self-hosted, newsletter and mailing Standalone, self-hosted, newsletter and mailing list manager.
Mail-in-a-Box: Become your own mail service provider in a few easy steps Mail-in-a-Box lets you become your own mail service provider in a few easy steps.
Mailcow: Mailserver suite with the 'moo' The mailserver suite with the 'moo'.
Mailu: simple yet full-featured mail server as a set of Docker images A simple yet full-featured mail server as a set of Docker images.
Mastodon: Social network server where users can follow Social network server where users can follow friends and discover new ones.
Mattermost: Open source platform for secure collaboration An open source platform for secure collaboration across the entire software development lifecycle.
Mautic: Open-source marketing automation software Open-source marketing automation software.
MiroTalk: Simple, secure, and fast real-time video conferences Simple, secure, and fast real-time video conferences.
Misskey: Open-source, federated social media platform that's free forever Misskey is an open-source, federated social media platform that's free forever.
Mixpost: Easily create, schedule, publish, and manage social media content in one place Easily create, schedule, publish, and manage social media content in one place.
Mox: A Modern, Low-Maintenance Mail Server in a Single Go Binary An all-in-one mail server with SMTP, IMAP, webmail, junk filtering, and automatic SPF, DKIM, DMARC, MTA-STS, DANE, and ACME certificates, set up with one quickstart command. MIT and MPL-2.0.
Mumble: Open-source, low-latency, high quality voice chat Open-source, low-latency, high quality voice chat software.
NodeBB: Real-Time Forum Software Built on Node.js Modern community forum software with real-time discussions, notifications, plugins, themes, SSO, and a REST API, running on Node.js with Redis, MongoDB, or PostgreSQL. GPL-3.0.
Notifuse: Self-Hosted Newsletters, Email Marketing, and Transactional Email An email platform with a visual MJML editor, campaigns with A/B testing, automation journeys, a transactional email API, and support for SES, Mailgun, Postmark, and more. Moved to the BSL license in version 40.
ntfy: Simple HTTP-based pub-sub notification service Simple HTTP-based pub-sub notification service.
OpenTalk: Secure video conferencing solution designed with productivity, digital sovereignty, and privacy in mind Secure video conferencing solution designed with productivity, digital sovereignty, and privacy in mind.
Pleroma: Microblogging server that can federate with other Microblogging server that can federate with other servers that support ActivityPub.
Postal: fully featured open source mail delivery platform for incoming and outgoing e-mail A fully featured open source mail delivery platform for incoming and outgoing e-mail.
Priviblur: What You Need to Know: Privacy-focused alternative frontend to Tumblr Privacy-focused alternative frontend to Tumblr.
Redlib: Private frontend for Reddit Private frontend for Reddit.
Rocket.Chat: Fully customizable communications platform with high standards of data protection Fully customizable communications platform with high standards of data protection.
Roundcube: Browser-based multilingual IMAP client with an application-like user interface Browser-based multilingual IMAP client with an application-like user interface.
SimpleX Chat: First messaging network operating without user The first messaging network operating without user identifiers of any kind.
SnappyMail: A Fast, Modern Webmail Client Forked From RainLoop A lightweight PHP webmail client with no database required, a modern interface, dark mode, Sieve filter editing, and OpenPGP encryption, as the maintained successor to RainLoop. Also available as a Nextcloud app. AGPL-3.0.
Snikket: Simple Self-Hosted Messaging for Small Groups An easy-to-deploy XMPP messaging service for families and small groups, bundling server, apps, and invitation flow into one opinionated package.
Stalwart Mail Server: Secure and modern all-in-one mail server Secure and modern all-in-one mail server.
Stoat (Formerly Revolt): An Open Source, Self-Hostable Discord Alternative A privacy-focused chat platform with servers, channels, roles, voice, and bots, written in Rust and licensed AGPL-3.0. Renamed from Revolt to Stoat on October 1, 2025 after a trademark dispute; accounts and servers carried over.
Synapse: Open-source Matrix homeserver written and maintained by the Matrix.org Foundation Open-source Matrix homeserver written and maintained by the Matrix.org Foundation.
Tuwunel: A High-Performance Matrix Homeserver, Successor to conduwuit A featureful Matrix homeserver in Rust that aims to fully implement the Matrix specification as a lighter alternative to Synapse. The official successor to conduwuit, sponsored by the Swiss government. Apache 2.0.
Zulip: Threaded Team Chat An open-source team chat application organized around topics within streams, so conversations stay readable and catchable-up on rather than scrolling past.
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