Substrate AI (Substrate Artificial Inteligence, S.A.) is a Madrid-headquartered AI company positioning itself as a European 'sovereign' AI stack: the Serenity Star / Serenity platform for building and governing generative-AI agents under EU AI Act and GDPR compliance, plus GPU data centres and a sovereign AI cloud, alongside AI-driven ventures in health, HR, industry and energy. It is publicly listed on BME Growth (ticker SAI) since May 2022 and is now the Spanish subsidiary of Stockholm-based Subgen AI (Nasdaq First North: SUBGEN); it reports 500+ customers and 200+ employees across Madrid and Talavera de la Reina. It was founded in December 2010 by Serratosa and García as KAU Finanzas, renamed Zona Value in 2018 and Substrate AI in June 2021.
Sovereign national AI group running GPU data centres and a sovereign cloud alongside AI ventures in health, energy and industry, the closest match to Substrate's conglomerate model.
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