Open Source Communication - Social Networks and Forums Software
Found 38 self-hosted alternatives in this category.
Akkoma
Federated microblogging server with Mastodon, GNU social, and ActivityPub compatibility
Answer
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
Comment system built in Golang, providing a lightweight and highly customizable solution for adding comments to your website
BuddyPress
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
Chirpy
Privacy-friendly and customizable Disqus (comment system) alternate. ([Demo](https://chirpy.dev/play), [Source Code](https://github.com/devrsi0n/chirpy))
Discourse
Advanced forum / community solution based on Ruby and JS. ([Demo](https://try.discourse.org/), [Source Code](https://github.com/discourse/discourse))
Enigma 1/2 BBS
Enigma 1/2 is a modern, multi-platform BBS engine with unlimited "callers" and legacy DOS door game support
Flarum
Delightfully simple forums. Flarum is the next-generation forum software that makes online discussion fun again
GoToSocial
ActivityPub federated social network server implementing the Mastodon client API
Hubzilla
Decentralized identity, privacy, publishing, sharing, cloud storage, and communications/social platform
Isso
Lightweight commenting server written in Python and Javascript. It aims to be a drop-in replacement for Disqus
Loomio
Collaborative decision-making tool that makes it easy for anyone to participate in decisions which affect them
Mastodon
Federated microblogging server. ([Source Code](https://github.com/mastodon/mastodon), [Clients](https://github.com/hyperupcall/awesome-mastodon))
Misago
Fully featured modern forum application that is fast, scalable and responsive
Misskey
Decentralized app-like microblogging server/SNS for the Fediverse, using the ActivityPub protocol like GNU social and Mastodon
Movim
Modern, federated social network based on XMPP, with a fully featured group-chat, subscriptions and microblogging
NodeBB
Forum software built for the modern web. ([Demo](https://try.nodebb.org/), [Source Code](https://github.com/NodeBB/NodeBB))
OSSN
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
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
PixelFed
Ethical photo sharing platform, powered by ActivityPub federation (alternative to Instagram)
Pleroma
Federated microblogging server, Mastodon, GNU social, & ActivityPub compatible
remark42
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. ([Demo](https://remark42.com/demo/), [Source Code](https://github.com/umputun/remark42))
Scoold
Stack Overflow in a JAR. An enterprise-ready Q&A platform with full-text search, SAML, LDAP integration and social login support. ([Demo](https://live.scoold.com), [Source Code](https://github.com/Erudika/scoold))
Simple Machines Forum
Free, professional grade software package that allows you to set up your own online community within minutes
Socialhome
Federated and decentralized profile builder and social network engine. ([Demo](https://socialhome.network/), [Source Code](https://github.com/jaywink/socialhome))
Talkyard
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). ([Demo](https://www.talkyard.io/forum/latest), [Source Code](https://github.com/debiki/talkyard))