@ben @EUCommission already an option, kinda, based on the Digital Markets Act (a different legislation than Digital Services Act mentioned in the original post of this thread):https://www.privacyguides.org/news/2025/11/18/whatsapp-rolls-out-messaging-interoperability-for-europeans/Matrix would have to apply to be a third-party WhatsApp client. Whether or not rules around this are FLOSS-friendly is something to be tested, Meta I think requires signing of an NDA to get access to the API.