Open

Open Internet Stack Sovereign Solutions (RIA)

HORIZON Research and Innovation Actions

Basic Information

Identifier
HORIZON-CL4-2026-04-DATA-02
Programme
DIGITAL
Programme Period
2021 - 2027
Status
Open (31094502)
Opening Date
January 15, 2026
Deadline
April 15, 2026
Deadline Model
single-stage
Budget
€1,000,000
Min Grant Amount
€1,000,000
Max Grant Amount
€1,000,000
Expected Number of Grants
1
Keywords
HORIZON-CL4-2026-04-DATA-02HORIZON-CL4-2026-04Communication engineering and systems telecommunicationsInternet architecturesOpen Source SoftwareOpen hardwareSoftware engineering, operating systems, computer languages

Description

Expected Outcome:

The overall expected outcome is a large selection of Open-Source solutions that will be organised under the Open Internet Stack framework built under WP 2025. This will address the needs of both supply and demand side of the rich and diverse eco-system of 3C European providers and verticals. This topic will stimulate the emergence at European and global scale of solutions that are:

  • Open source and made in Europe, supporting trust, and sovereignty, and delivering credible alternative choices for citizens, governments and companies including start-ups and SMEs.
  • Paced for easy deployment by the rich European eco-systems of providers, integrators and verticals.
  • Interoperable, standard-based, decentralised solutions for enabling network effect.
Scope:

Proposals should address one or several of the following technology 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.

Applicants should devise a plan for ensuring that the solutions are designed for efficient deployment, with pre-configured, modular components that facilitate integration by a wide range of users, including SMEs, public administrations, research and education and service providers.

Applicants should detail development, integration, testing, deployment, uptake and operation activities. Focus will be on Open Source solutions and their integration and adoption in vertical use cases, to ensure replicability of the results and portability in different areas.

Proposals are expected to demonstrate:

  • That the proposed solution(s) has(ve) the technical maturity in terms of scalability, resiliency, advanced cryptographic protection (e.g. against emerging quantum threats via post-quantum cryptography), alignment with standards including for software and hardware supply chain and efficiency including environmental.
  • That there is a community with critical mass that actively supports the development with or without associated business model.
  • Evidence of use cases, interest and engagement from users and deployers of the solution.
  • Credible path to be part of the Open Internet Stack in terms of cataloguing, searchability, availability through app-stores and alignment with EU regulation.

Applicants should detail any relevant previous projects on which the project will expand.

Applicants should detail their plan to creating synergies with other topics such as those in the WP25 Open Internet Stack, 3C, Virtual Worlds/Web4.0 as well as like-minded initiatives on the same solution perimeter.

Proposals should also detail their strategy for maintenance, cataloguing, marketing, communication as well as the relationship with to the “Open Internet Stack Support for Scale” topic.

Beneficiaries that intend to transfer ownership or grant an exclusive licence must formally notify the granting authority (i.e. DG-CNECT and HaDEA) before the intended transfer or licensing takes place and the granting authority may up to four years after the end of the action object to a transfer of ownership or the exclusive licensing of results.

Financial support to third parties

If applicants opt for financial support to third parties, they should primarily target calls towards internet innovators and adopters of Open Source technologies. Applicants should provide the programme logic for the third-party projects, managing the projects lifecycle, and provide the necessary technical and non-technical support: these tasks cannot be implemented using the budget earmarked for the financial support to third parties.

Destination & Scope

Developing an agile and secure single market for data and trustworthy AI services is central to Europe’s digital sovereignty and competitiveness. The convergence of the Telco-Edge-Cloud continuum (3C) with open orchestration platforms will unlock the transformative potential of AI across strategic sectors, from mobility and energy to health and manufacturing, fostering new services and business models. Building a sovereign Open Internet Stack, rooted in open-source, interoperable and standard-based solutions, will reinforce trust, resilience and innovation, while ensuring Europe retains control over critical digital infrastructures. At the same time, decentralised and federated approaches to AI data processing, combined with breakthroughs in sustainable data centres, will help overcome Europe’s compute bottlenecks and dependencies, and reduce the environmental footprint of AI. By aligning with the Data Union Strategy and Common European Data Spaces, these efforts will deliver secure, compliant and adaptive data-sharing frameworks that empower citizens, businesses and administrations. Together, they will strengthen Europe’s ability to innovate, scale and lead globally in data and AI, anchoring digital sovereignty in line with EU values and strategic interests.

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. For additional information please see “Restrictions on the participation of legal entities established in China” found in General Annex B of the General Annexes.

Eligibility & Conditions

General conditions

1. Admissibility Conditions: Proposal page limit and layout

described in Annex A and Annex E of the Horizon Europe Work Programme General Annexes.

Proposal page limits and layout: described in Part B of the Application Form available in the Submission System.

2. Eligible Countries

described in Annex B of the Work Programme General Annexes.

A number of non-EU/non-Associated Countries that are not automatically eligible for funding have made specific provisions for making funding available for their participants in Horizon Europe projects. See the information in the Horizon Europe Programme Guide.

3. Other Eligible Conditions

Subject to restrictions for the protection of European communication networks.

described in Annex B of the Work Programme General Annexes.

4. Financial and operational capacity and exclusion

described in Annex C of the Work Programme General Annexes.

5a. Evaluation and award: Award criteria, scoring and thresholds

are described in Annex D of the Work Programme General Annexes.

5b. Evaluation and award: Submission and evaluation processes

are described in Annex F of the Work Programme General Annexes and the Online Manual.

5c. Evaluation and award: Indicative timeline for evaluation and grant agreement

described in Annex F of the Work Programme General Annexes.

6. Legal and financial set-up of the grants

The granting authority may, up to 4 years after the end of the action, object to a transfer of ownership or to the exclusive licensing of results, as set out in the specific provision of Annex 5.

Beneficiaries may provide financial support to third parties (FSTP). The support to third parties can only be provided in the form of grants. The maximum amount to be granted to each third party is EUR 400 000 to allow 1/ cases where a given legal entity may receive FSTP under several grants (e.g. from different calls) 2/ reaching the maturity level for third party’s project to ensure sustainability with multiple awards. FSTP may comprise up to a maximum of 80% of the total requested EU contribution.

described in Annex G of the Work Programme General Annexes.

Specific conditions

described in the [specific topic of the Work Programme]

Frequently Asked Questions About Open Internet Stack Sovereign Solutions (RIA)

DIGITAL (2021 - 2027).
Per-award amount: €1,000,000. Total programme budget: €1,000,000. Expected awards: 1.
Deadline: April 15, 2026. Deadline model: single-stage.
Eligible organisation types (inferred): SMEs, Companies.
Admissibility Conditions: Proposal page limit and layout described in Annex A and Annex E of the Horizon Europe Work Programme General Annexes. Proposal page limits and layout: described in Part B of the Application Form available in the Submission System.
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.
from different calls) 2/ reaching the maturity level for third party’s project to ensure sustainability with multiple awards.
You can contact the organisers at [email protected].

Support & Resources

Online Manual is your guide on the procedures from proposal submission to managing your grant.

Horizon Europe Programme Guide contains the detailed guidance to the structure, budget and political priorities of Horizon Europe.

Funding & Tenders Portal FAQ – find the answers to most frequently asked questions on submission of proposals, evaluation and grant management.

Research Enquiry Service – ask questions about any aspect of European research in general and the EU Research Framework Programmes in particular.

National Contact Points (NCPs) – get guidance, practical information and assistance on participation in Horizon Europe. There are also NCPs in many non-EU and non-associated countries (‘third-countries’).

Enterprise Europe Network – contact your EEN national contact for advice to businesses with special focus on SMEs. The support includes guidance on the EU research funding.

IT Helpdesk – contact the Funding & Tenders Portal IT helpdesk for questions such as forgotten passwords, access rights and roles, technical aspects of submission of proposals, etc.

European IPR Helpdesk assists you on intellectual property issues.

CEN-CENELEC Research Helpdesk and ETSI Research Helpdesk – the European Standards Organisations advise you how to tackle standardisation in your project proposal.

The European Charter for Researchers and the Code of Conduct for their recruitment – consult the general principles and requirements specifying the roles, responsibilities and entitlements of researchers, employers and funders of researchers.

Partner Search help you find a partner organisation for your proposal.

Latest Updates

Last Changed: January 15, 2026
The submission session is now available for: HORIZON-CL4-2026-04-DIGITAL-EMERGING-18, HORIZON-CL4-2026-04-DIGITAL-EMERGING-17, HORIZON-CL4-2026-04-HUMAN-02, HORIZON-CL4-2026-04-DIGITAL-EMERGING-01, HORIZON-CL4-2026-04-DATA-03, HORIZON-CL4-2026-04-DIGITAL-EMERGING-08, HORIZON-CL4-2026-04-DATA-06, HORIZON-CL4-2026-04-DATA-02, HORIZON-CL4-2026-04-DIGITAL-EMERGING-12, HORIZON-CL4-2026-04-DIGITAL-EMERGING-09, HORIZON-CL4-2026-04-DIGITAL-EMERGING-11, HORIZON-CL4-2026-04-DIGITAL-EMERGING-19, HORIZON-CL4-2026-04-HUMAN-01, HORIZON-CL4-2026-04-DIGITAL-EMERGING-14, HORIZON-CL4-2026-04-DIGITAL-EMERGING-15
Grantalist - HORIZON-CL4-2026-04-DATA-02 - Open Internet Stack Sovereign Solutions (RIA) | Grantalist