@veroandi @tio @leanderlindahl
Friendica functions as a **universal hub in the Fediverse**, integrating diverse social platforms through multiple federation protocols and extended connectivity features.
### 1. **Multi-Protocol Federation**
Friendica supports several decentralized protocols, enabling broad interoperability:
- **ActivityPub**: Connects with **Mastodon**, **Pleroma**, **Pixelfed**, **Lemmy**, and **PeerTube**, allowing bidirectional follows, likes, comments, and post sharing.
- **Diaspora\***: Enables federation with Diaspora pods and Hubzilla, supporting posts, comments, and photo sharing (excluding polls).
- **OStatus**: Provides compatibility with legacy platforms like **GNU Social** (public posts only).
- **DFRN (Distributed Friend Request Network)**: Friendica’s native protocol for secure, encrypted communication between Friendica nodes, supporting advanced features like wall-to-wall posting and remote comments.
### 2. **Cross-Network Integration**
Friendica acts as a bridge between the Fediverse and external networks:
- **Bidirectional Sync**: Users can follow and interact with accounts on **Bluesky**, **Tumblr**, and **GNU Social**, with content appearing in their feed.
- **Outbound Publishing**: Posts can be mirrored to **WordPress**, **Tumblr**, **Libertree**, **Blogger**, and **Buffer** (for Facebook, LinkedIn, Twitter).
- **Email Integration**: Full two-way sync via IMAP/SMTP allows users to send and receive social posts as emails, even communicating with non-Fediverse users.
- **RSS/Atom Feeds**: External blogs and websites can be imported into the user’s stream.
### 3. **Advanced Social Features**
Friendica offers a rich, customizable experience beyond basic microblogging:
- **Long-form Content**: Supports posts up to **200,000 characters** with rich text formatting (bold, italics, tables, code blocks).
- **Privacy Controls**: Fine-grained access lists using **Circles** (formerly groups) and **Channels** to share content with specific audiences.
- **Media & Events**: Photo albums, file attachments, embedded videos (YouTube, Vimeo), event creation with RSVPs, and calendar integration.
- **Multiple Profiles**: Users can maintain different profiles (e.g., personal, professional) visible to different audiences.
- **Forums & Groups**: Public, private, and moderated forums for community discussions.