merlinux supports four FOSS community projects aiming to provide decentralized, secure, and resilient messaging infrastructure, and in turn is supported by public grants and private contributions from collaborators and donation sponsors. All efforts are based on established IETF and W3C specifications and are embedded in a dynamic worldwide partner and expert network.

Current key project involvements

Delta Chat is an instant messenger that uses email infrastructure for message transport, requires no phone number, and provides end-to-end encryption by default.

chatmail provides FOSS infrastructure templates for secure instant messaging with automatic end-to-end encryption and metadata minimization, supported by the Sovereign Tech Fund.

webxdc enables sharing of interactive applications in chat messages with end-to-end encryption and no central server.

autocrypt2 is an IETF-submitted modern OpenPGP certificate structure that offers defense against store-now-decrypt-later attacks, using post-quantum cryptography and reliable deletion ("Forward Secrecy"), scheduled for end-user ready deployment in 2026.

Contact and legal information

Contact: office@merlinux.eu
Delta Chat: delta@merlinux.eu

merlinux GmbH
Reichsgrafenstr. 20
79102 Freiburg, Germany

Amtsgericht Freiburg: HRB709589
VAT: DE814082730
Managing Director: Holger Krekel