{"slug": "proton-partners-with-apertus-switzerland-s-sovereign-ai-model-proton", "title": "Proton partners with Apertus, Switzerland's sovereign AI model | Proton", "summary": "Proton announced a partnership with Apertus, Switzerland's sovereign AI model, according to a September 23, 2026 post in the Privacy Guides Community. The announcement drew a community response asking whether Proton would now release the source code for its Calendar app. Apertus was previously launched as a public, open-source AI model built for privacy, and Proton's own Lumo AI product has faced community scrutiny over its open-source claims.", "body_md": "Privacy Guides Community\nProton partners with Apertus, Switzerland's sovereign AI model | Proton\nGeneral\nNews\narticle\nAbdalonymus\nSeptember 23, 2026, 4:24am\n1\n1 Like\nnot-wittingly\nSeptember 23, 2026, 5:11am\n2\nAwesome. Can they release the Calendar app source code now.\nRelated topics\nTopic\nReplies\nViews\nActivity\nSwitzerland Launches Apertus: A Public, Open-Source AI Model Built for Privacy\nNews\narticle\n,\nsoftware\n15\n1750\nSeptember 6, 2025\nIntroducing Lumo, the AI where every conversation is confidential | Proton\nGeneral\narticle\n184\n16131\nJuly 2, 2026\nProton is moving most of its physical infrastructure out of Switzerland\nGeneral\narticle\n87\n12144\nDecember 13, 2025\nProton markets Lumo as \"open source,\" but support calls it a \"long-term intention, not the instantaneous state\"\nGeneral\n84\n6865\nApril 1, 2026\nProton Released A New Privacy Product? | This Week in Privacy #11 (Jul. 25, 2025)\nLivestreams\n11\n1799\nJuly 26, 2025", "url": "https://wpnews.pro/news/proton-partners-with-apertus-switzerland-s-sovereign-ai-model-proton", "canonical_source": "https://discuss.privacyguides.net/t/proton-partners-with-apertus-switzerlands-sovereign-ai-model-proton/40937#post_2", "published_at": "2026-09-23 05:11:37+00:00", "updated_at": "2026-09-23 05:24:10.837648+00:00", "lang": "en", "topics": ["artificial-intelligence", "ai-policy", "ai-products"], "entities": ["Proton", "Apertus", "Switzerland", "Lumo", "Privacy Guides Community"], "alternates": {"html": "https://wpnews.pro/news/proton-partners-with-apertus-switzerland-s-sovereign-ai-model-proton", "markdown": "https://wpnews.pro/news/proton-partners-with-apertus-switzerland-s-sovereign-ai-model-proton.md", "text": "https://wpnews.pro/news/proton-partners-with-apertus-switzerland-s-sovereign-ai-model-proton.txt", "jsonld": "https://wpnews.pro/news/proton-partners-with-apertus-switzerland-s-sovereign-ai-model-proton.jsonld"}}