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    HORIZON-CL4-2025-03-DATA-11

    Open Internet Stack: development of technological commons/open-source 3C building blocks (RIA)

    OpenLive official EU data

    DIGITAL - CNECT · HORIZON-RIA · Needs partners

    3 Jan 2027
    Deadline
    €10M
    Indicative, per project
    ~1
    Grants expected
    86
    Past winners in this family

    What this call funds

    This call funds the development of open source building blocks for a trustworthy, decentralised internet stack, covering areas like trust technologies, connectivity, and decentralised infrastructure. It supports both a main consortium project and smaller third party grants distributed through open calls to individual developers, SMEs, and research groups working on open source internet commons. The practical route for most small contributors is the Restack open call, run by NLnet, which funds small to medium sized technical projects released under open licences.

    software platforms · cybersecurity · blockchain web3 · internet of things · telecom 6g · deep tech

    Who wins this

    The call best suits open source developers, small teams, or research groups building concrete, openly licensed technology components for internet infrastructure, trust, connectivity, or decentralisation, as well as a larger consortium able to coordinate a 3C large scale pilot and manage cascading grants to third parties.

    Could you win this call?

    Only the website is required.

    The call in detail

    Indicative grant size
    €10M
    Funding model
    Budget-based. Reimbursement of actual eligible costs
    Submission
    Single-stage submission (full proposal at once)
    Partners
    Required. The call asks for a consortium: a group applying together, typically 3+ organisations from 3+ countries.
    Eligible applicants
    SME, research organisation, non-profit, individual, public body
    Support to third parties
    Up to 70% of the requested EU contribution may be used for financial support to third parties, with each third party project typically funded in the range of EUR 50,000 to 150,000 and a maximum of EUR 400,000 per third party across multiple awards. Under the related Restack open call, individual third party proposals typically request between EUR 5,000 and 50,000.
    Also required
    Gender dimension integration is not mandatory for this topic, projects should typically run 36 months, results must be released under a recognised free or open source license, and GenAI related projects are generally out of scope for the Restack sub call unless already widely used by over 1 million active users.
    Sectors
    AI/ML · Deep Tech · Manufacturing · Aerospace
    Eligible countries (45)
    Austria, Belgium, Bulgaria, Croatia, Cyprus, Czechia, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Norway, Iceland, Switzerland, United Kingdom, Israel, Türkiye, Ukraine, Serbia, North Macedonia, Montenegro, Albania, Bosnia and Herzegovina, Kosovo, Georgia, Armenia, Moldova, Tunisia, New Zealand
    Read the full conditions from the official call ›

    General conditions 1. Admissibility Conditions: Proposal page limit and layout are 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 are 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 are 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 is described in Annex F of the Work Programme General Annexes. 6. Legal and financial set-up of the grants Beneficiaries may provide financial support to third parties. 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 several grants (e.g. from different calls) 2/ reaching the maturity level for third party’s project to ensure sustainability with multiple awards. To support and mobilise internet innovators, a maximum of 70% of the total requested EU contribution could be allocated to financial support to third parties, selected through open calls. Described in Annex G of the Work Programme General Annexes. Specific conditions are described in the specific topic of the Work Programme.

    Who has won calls like this

    Organisations that most often win this call family · 86 past winners

    ATOS IT SOLUTIONS AND SERVICES IBERIA SL · ES
    17 wins
    led 2
    TELEFONICA INNOVACION DIGITAL SL · ES
    14 wins
    led 1
    NETCOMPANY S.A. · LU
    14 wins
    led 1
    ECLIPSE FOUNDATION EUROPE GMBH · DE · SME
    13 wins
    FRAUNHOFER GESELLSCHAFT ZUR FORDERUNG DER ANGEWANDTEN FORSCHUNG EV · DE
    12 wins
    led 1
    EREVNITIKO PANEPISTIMIAKO INSTITOUTO SYSTIMATON EPIKOINONION KAI YPOLOGISTON · EL
    12 wins
    led 2

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