Akkoma source
Federated microblogging server with Mastodon, GNU social, and ActivityPub compatibility.
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Self-hosted Communication - Social Networks and Forums software (2026)
[Social Networking](https://en.wikipedia.org/wiki/Social_networking_service) and [Forum](https://en.wikipedia.org/wiki/Internet_forum) software.
40 open-source apps · all free & self-hostable
Answer source
Knowledge-based community software. You can use it to quickly build your Q&A community for product technical support, customer support, user communication, and more.
Artalk source
Comment system built in Golang, providing a lightweight and highly customizable solution for adding comments to your website.
AsmBB source
Fast, SQLite-powered forum engine written in ASM.
BuddyPress source
Powerful plugin that takes your WordPress.org powered site beyond the blog with social-network features like user profiles, activity streams, user groups, and more.
Coral source
A better commenting experience from Vox Media.
diaspora* source
Distributed social networking server.
Discourse source
Advanced forum / community solution based on Ruby and JS.
Elgg source
Powerful open source social networking engine.
Enigma 1/2 BBS source
Enigma 1/2 is a modern, multi-platform BBS engine with unlimited "callers" and legacy DOS door game support.
Flarum source
Delightfully simple forums. Flarum is the next-generation forum software that makes online discussion fun again.
Friendica source
Social Communication Server.
GoToSocial source
ActivityPub federated social network server implementing the Mastodon client API.
Habitat source
A Platform for Local Communities.
Hatsu source
Bridge that interacts with Fediverse on behalf of your static site.
Hubzilla source
Decentralized identity, privacy, publishing, sharing, cloud storage, and communications/social platform.
HumHub source
Flexible kit for private social networks.
Iceshrimp.NET source
Federated microblogging server that communicates over ActivityPub.
Isso source
Lightweight commenting server written in Python and Javascript. It aims to be a drop-in replacement for Disqus.
Lemmy source
Link aggregator for the fediverse (alternative to Reddit).
Loomio source
Collaborative decision-making tool that makes it easy for anyone to participate in decisions which affect them.
Mastodon source
Federated microblogging server.
Misago source
Fully featured modern forum application that is fast, scalable and responsive.
Misskey source
Decentralized app-like microblogging server/SNS for the Fediverse, using the ActivityPub protocol like GNU social and Mastodon.
Movim source
Modern, federated social network based on XMPP, with a fully featured group-chat, subscriptions and microblogging.
MyBB source
Free, extensible forum software package.
NodeBB source
Forum software built for the modern web.
OSSN source
Social networking software that allows you to make a social networking website and helps your members build social relationships, with people who share similar professional or personal interests.
phpBB source
Flat-forum bulletin board software solution that can be used to stay in touch with a group of people or can power your entire website.
PieFed source
A link aggregator / reddit clone for the fediverse (alternative to Reddit).
PixelFed source
Ethical photo sharing platform, powered by ActivityPub federation (alternative to Instagram).
Pleroma source
Federated microblogging server, Mastodon, GNU social, & ActivityPub compatible.
qpixel source
Q&A-based community knowledge-sharing software.
Redlib
An alternative private front-end to Reddit, with its origins in Libreddit.
remark42 source
Lightweight and simple comment engine, which doesn't spy on users. It can be embedded into blogs, articles or any other place where readers add comments.
Scoold source
Stack Overflow in a JAR. An enterprise-ready Q&A platform with full-text search, SAML, LDAP integration and social login support.
Simple Machines Forum source
Free, professional grade software package that allows you to set up your own online community within minutes.
Socialhome source
Federated and decentralized profile builder and social network engine.
Talkyard source
Create a community, where your users can suggest ideas and get questions answered. And have friendly open-ended discussions and chat (Slack/StackOverflow/Discourse/Reddit/Disqus hybrid).
yarn.social source
Self-Hosted, Twitter™-like Decentralised micro-logging platform. No ads, no tracking, your content, your data.