diaspora*

diaspora* is an open-source, federated social network that lets people join independently operated servers (pods) and control audience and data with fine-grained privacy controls called Aspects. It provides a social stream with familiar actions (hashtags, mentions, reshares, likes) and is implemented as a Rails application for pod hosting and federation. (diasporafoundation.org)

Key Features

• Pod-based federation model: users register on independently operated pods and communicate across pods via the diaspora federation protocol and standard discovery methods. Documentation and the project site describe pod-based federation and discovery. (diasporafoundation.org)
• Privacy-by-design Aspects: contacts are grouped into named Aspects so posts can be targeted to specific groups rather than all contacts.
• Familiar social features: support for hashtags, @mentions, reshares and a simple reaction (love/like) workflow.
• Cross-posting integrations: built-in options to cross-post to external services (examples include Twitter, Tumblr, WordPress) when configured by pod admins or users.
• Production-ready codebase and deployment tooling: the project includes Rails app artifacts, JavaScript assets, a Docker development folder and deployment guidance in its repository. (github.com)

Use Cases

• Community-run social networks: organizations or interest groups that want a privacy-respecting social stream can host a pod to serve members.
• Private or distributed social spaces: users who need segmented sharing (family, work, hobbies) can use Aspects to target posts.
• Research, teaching, or demos: institutions can deploy pods for classroom/demo environments to show federated social concepts. Documentation and install guides include instructions for pod setup and database configuration. (centron.de)

Limitations and Considerations

• Limited interoperability with ActivityPub-based Fediverse: diaspora* uses its own federation protocol and historically does not implement ActivityPub, which restricts direct federation with ActivityPub-only networks (e.g., many Mastodon instances). This is a notable interoperability consideration for deployment and community reach. (en.wikipedia.org)

In summary, diaspora* is a mature, privacy-oriented federated social platform focused on pod-based federation and audience control through Aspects. Its codebase and docs provide production deployment and administration guidance for communities that want decentralized social hosting.