Matrix, XMPP, and Delta Chat issue call for speakers for FOSDEM 2027 devroom

The Matrix.org Foundation, the XMPP Standards Foundation (XSF), and the Delta Chat community have announced a joint Call for Participation (CFP) for a dedicated Decentralised Messaging devroom at FOSDEM 2027. The event aims to bring together developers and engineers from various federated ecosystems to discuss technical hurdles that persist despite differing underlying architectures.

The devroom will focus on practical implementation experiences, interoperability, and shared technical challenges. Organizers are specifically seeking technical presentations, demos, and experience reports rather than marketing-oriented talks. The session is scheduled for January 31, 2027, in Brussels, Belgium, with a submission deadline of November 20, 2026.

Technical focus areas for decentralized messaging

• Interoperability and Bridging: Focus on practical gateways and bridging mechanisms between disparate decentralized messaging protocols.
• Security and Encryption: Discussion of end-to-end encryption (E2EE) implementations, specifically group E2EE using protocols like MLS, and decentralized key transparency.
• Federated Governance: Addressing spam, abuse, and moderation strategies within federated topologies without relying on centralized gatekeeping.
• Protocol Expansion: Development of tools and extensions for other federated stacks, including ActivityPub and AT Protocol.
• Infrastructure and Scaling: Optimization of server operations, federation scaling, and synchronization for low-power mobile clients.

Why it matters

This collaboration encourages cross-protocol standardization and the development of reusable components like shared moderation tools. By uniting Matrix, XMPP, and Delta Chat developers, the initiative seeks to improve the usability and security of federated communication for the broader open-source ecosystem.