Mbin
Mbin is a federated content aggregator offering voting, discussion and microblogging via ActivityPub. A community-focused fork of kbin, built with PHP and Symfony.

Mbin is a decentralized content aggregator, voting, discussion and microblogging platform that participates in the Fediverse via ActivityPub. It is a community-driven fork of kbin providing a web UI for submitting links, posts, comments and votes, and interoperates with other ActivityPub services.
Key Features
- Full ActivityPub support for federation with Mastodon, Lemmy, Pleroma, PeerTube and similar services
- Posting, link aggregation, threaded discussion, and up/down voting model for community moderation
- Web UI built with PHP and Symfony using Twig templates and JavaScript enhancements
- Docker and Docker Compose deployment options and documentation for bare-metal installations
- Multi-language support and community-driven translations via integrated localization workflow
- Code security practices with composer dependency management and regular audits
Use Cases
- Running a federated community forum or link aggregator that interoperates across the Fediverse
- Hosting a microblogging site with voting and threaded discussions similar to Reddit/Lemmy
- Integrating community-moderated content streams and magazines for niche interest groups
Limitations and Considerations
- Requires familiarity with PHP/Symfony and typical web hosting stacks for installation and maintenance
- Federation behavior can vary depending on ActivityPub implementations of other servers; interoperability nuances may require tuning
- Smaller project and ecosystem compared to some larger Fediverse implementations; administrative resources and third-party tooling are more limited
Mbin is suited for operators who want a community-focused, federated aggregator and discussion platform with active development and a focus on interoperability and usability.
