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

Funder: European Commission

Due Dates: October 2, 2025: Full application submission deadline (single-stage topic HORIZON-CL4-2025-03-DATA-11) — 17:00 Brussels time

Funding Amounts: €10,000,000 total for this topic; one grant expected; project duration typically 36 months; up to 70% of budget may be allocated as financial support to third parties.

Summary: Funds open-source digital commons to build trusted, interoperable, and decentralised technology components for next-generation European internet infrastructures.

Key Information: Single-stage application; max 70% of budget can support third-party open-source projects; consortium eligibility applies.

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

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