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
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.
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
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
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 calendar in every forum
Organize meetups, challenges, streams, and recurring events, then discover them across communities and locations.
Explore eventsTransparent by default
You always find out why
Moderation is organized around public issues, reversible actions, and clear requests—not unexplained disappearances.
- 01
A removed post links to an issue page explaining why it was archived.
- 02
Reports about the same content land on one page, creating one accountable conversation instead of scattered complaints.
- 03
Archive and edit are the default tools. Archiving is reversible; permanent deletion is exceptional.
- 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.
- 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.
Make it yours
Run it yourself
Multiforum is MIT licensed. Host it for one community or build an interconnected home for several.