Send in your ideas. Deadline April 1, 2026

Matchmaking sessions for the EC's Open Internet Stack Open Calls

You are invited to the matchmaking sessions for the European Commission's open calls for the Open Internet Stack and Web 4.0 topics of work-programme 2026. The aim of the sessions is to facilitate people who are interested in finding consortium partners to apply for a grant together. There will be three sessions, organized per open call.

Aim and format of the sessions

The aim of the sessions is to facilitate matchmaking for people who are interested in building a consortium to apply for the grants in the Open Internet Stack and Web 4.0 topics. After a short introduction from the EC, the floor will be opened on a first come, first serve basis. Parties who are interested in finding consortium partners will have 5 minutes to present themselves, the related technology area, the experience/background and their ideas for the call.

Matchmaking session for: DATA02: Open Internet Stack Sovereign Solutions

The Open Call DATA-02 covers three areas:

  • Network and Transport technologies including for example routing and virtual private networks, survivable mesh technologies.
  • Sovereign operating systems and firmware (including smartphones).
  • Open Source software productivity and supply chain technologies such as federated forges, independent and cross-platform development framework.
The full name of the call is HORIZON-CL4-2026-04-DATA-02: Open Internet Stack Sovereign Solutions (RIA). It opened on January 15, 2026 and will close on April 15, 2026, 17.00 CET. You can read about the call in the Workprogramme text, on pages 110-113.
A presentation was given about the calls on Horizon Europe Cluster 4 Info Day: Digital Calls. You can find the recording on Youtube. The part on DATA-02 starts on the 13:57 mark.

Matchmaking session for: HUMAN-02: Web 4.0 architectural framework and Open Internet Stack applications for virtual worlds

The Open Call HUMAN-02 covers the following areas:

  • Architectural Framework.
  • Alternative decentralised applications and services such as synchronous and asynchronous messaging, videoconferencing, collaboration and groupware or social media that can be exploited through Virtual Worlds technologies, including immersion and interaction.
  • App-stores (incl. web-based) adapted for Virtual Worlds
  • Shared, robust and trustworthy cross-technology Virtual Worlds for user and attribute management
The full name of the call is HORIZON-CL4-2026-04-HUMAN-02: Web 4.0 architectural framework and Open Internet Stack applications for virtual worlds (RIA). It opened on January 15, 2026 and will close on April 15, 2026, 17.00 CET. You can read about the call in the Workprogramme text, on pages 248-251.

Matchmaking session for: DATA-03 Coordination and Support Action for the Open Internet Stack

The Open Call DATA-03 looks the following outcomes:

  • A common approach and hub for cataloguing, packaging, reviewing and validating Open Internet Stack components and projects.
  • Long term viability by advising on Open Source sustainability and maintenance models
  • A common branding, marketing, training and communication plan ensuring consistent perception and scale-up.
The full name of the call is HORIZON-CL4-2026-04-DATA-03: Open Internet Stack Support for Scale (CSA). It opened on January 15, 2026 and will close on April 15, 2026, 17.00 CET. You can read about the call in the Workprogramme text, on pages 113-114.
A presentation was given about the calls on Horizon Europe Cluster 4 Info Day: Digital Calls. You can find the recording on Youtube. The part on DATA-03 starts on the 19:39 mark.