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HORIZON-CL4-2026-04-DATA-02

Open Internet Stack Sovereign Solutions

RIACluster 4€20,500,00015 Apr 2026
Topic CodeHORIZON-CL4-2026-04-DATA-02F&T Portal
Call IdentifierHORIZON-CL4-2026-04Call — DIGITAL (single stage)
InstrumentHORIZON-RIAResearch and Innovation Action
Budget ModelActual CostsStandard MGA
Funding Rate100%Annex G — RIA = 100%
Page Limit (Part B)40 pagesRIA + actual costs (Annex A)
Evaluation Thresholds3 / 3 / 3 · cum. 10Standard — no override
Expected Projects2€7–10.25M each (WP stated)
DestinationDeveloping an agile and secure single market and infrastructure for data-services and trustworthy AI servicesWP Part 7
Cluster / PillarCluster 4 / Pillar IIDigital, Industry and Space
China EligibilityExcluded ▲RIA & IA excluded under this destination
Special ConditionsEU comms restrictions ▲High-risk mobile network suppliers excluded
Verify: Open this topic on the F&T Portal →  ·  Sources: General Annexes 2026-2027, WP Part 7
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Chinese entities are excluded from RIA under this destination. "Legal entities established in China are not eligible to participate in both Research and Innovation Actions (RIAs) and Innovation Actions (IAs) falling under this destination."
EU communications network restrictions apply. Entities assessed as high-risk suppliers of mobile network communication equipment cannot submit guarantees and are effectively excluded.

Expected Outcomes

  1. Sovereign, open-source based solutions for the Open Internet Stack are developed and validated, reinforcing European digital sovereignty and reducing dependency on non-EU technology providers.
  2. Interoperable and standard-based platforms are available for deployment across strategic sectors, strengthening trust, resilience, and innovation in European digital infrastructure.

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