Community software, connected differently

One post. Many forums. No duplicate noise.

Open-source forum software where every community gets its own conversation, moderation, wiki, calendar, and download library.

Open source · MIT licensed · Built with Nuxt and Neo4j

MFOne postShared, not copied
GardeningLocal foodUrban design
🌱Gardening24 comments
🥕Local food8 comments
🏘️Urban design15 comments

Crossposting, without the copies

One post, many forums, listed once

Publish a post to every forum where it belongs. Multiforum keeps one canonical post and gives each forum its own local context.

  • Each forum gets its own comment section, moderators, rules, votes, labels, and moderation state.
  • Subscribe to five of those forums and the post still appears once in your feed, with the other destinations shown alongside it.
  • Post to the broad community and the specific one without spamming either. Small forums become more useful—and more worth starting.
  • Archiving a post in one forum has no effect on the others or on the underlying post.
  • Seeing where else a post belongs is a natural way to discover communities you did not know existed.
How crossposting works
One canonical post
POST
Community gardens need shadeOne title · one body · one history
G
GardeningComments · votes · moderators
12
P
PhoenixComments · votes · moderators
7
U
Urban planningComments · votes · moderators
21

The graph separates the post from each forum submission—there was only ever one thing to show.

More than discussions

A community’s shared memory and meeting place

01

Downloads that stay useful

A download is a real page, not a file link buried in a post. Files, descriptions, screenshots, versions, filters, and comments stay together.

Explore downloads
Multiforum download library with filters
02

A wiki in every forum

Keep how-tos, reference pages, and living documents somewhere designed to be revised—not in a pinned thread one person maintains forever.

A wiki page in Multiforum
03

A calendar in every forum

Organize meetups, challenges, streams, and recurring events, then discover them across communities and locations.

Explore events

Transparent by default

You always find out why

Moderation is organized around public issues, reversible actions, and clear requests—not unexplained disappearances.

  1. 01

    A removed post links to an issue page explaining why it was archived.

  2. 02

    Reports about the same content land on one page, creating one accountable conversation instead of scattered complaints.

  3. 03

    Archive and edit are the default tools. Archiving is reversible; permanent deletion is exceptional.

  4. 04

    Most rule-breaking starts with someone who did not know the rule, so moderators can ask for an edit before reaching for a ban.

  5. 05

    Actions can be reviewed, audited, and reversed.

Extensible by design

Add what your community needs

Extend Multiforum without maintaining a fork. Connect security scans, moderation helpers, bots, and other APIs to the events you choose.

See it in the wild

Visit topical.space

Explore a running Multiforum instance. Browse communities, follow a crossposted discussion, and see how the pieces fit together.

Open the live site

Make it yours

Run it yourself

Multiforum is MIT licensed. Host it for one community or build an interconnected home for several.