WhatsApp chats with other messengers: Threema lists reasons for rejection

July 24, 2026 at 09:07 AM UTC
Heise Online
Original: DE
WhatsApp chats with other messengers: Threema lists reasons for rejection

Threema, a privacy-focused messaging service, has publicly stated its refusal to connect with WhatsApp under new EU regulations mandating interoperability. This decision highlights broader concerns within the European tech landscape regarding the implications of such mandates on user privacy and service integrity. The EU's Digital Markets Act (DMA) aims to foster competition by compelling large platforms to open their services, but it raises questions about how smaller, privacy-centric applications will navigate these new requirements. While user privacy is a significant factor, Threema cites additional technical and operational challenges as reasons for its stance. The company emphasizes that simply connecting to a platform like WhatsApp, which has different architectural foundations and data handling practices, is not a straightforward integration. This complexity underscores the technical hurdles faced by developers attempting to bridge disparate messaging ecosystems. The refusal by Threema, and potentially other secure messaging alternatives, could impact the intended outcome of the EU's interoperability push. Instead of fostering wider choice and seamless communication, it might lead to a fragmented landscape where some services opt out, leaving users with fewer secure options. This situation raises questions about the feasibility of forcing interoperability onto services with fundamentally different security and privacy philosophies.

Curated and translated by Europe Digital for our multilingual European audience.

Why this matters for European digital sovereignty

Threema's refusal to interoperate with WhatsApp under new EU regulations underscores the tension between the DMA's interoperability goals and the privacy-focused stance of European tech companies. This decision highlights the technical and operational challenges faced by secure messaging services in complying with mandates that may conflict with their core principles. The situation raises questions about the effectiveness of forcing interoperability on services with divergent security and privacy philosophies within the European digital market.

Source Information

Publication: Heise Online
Published: July 24, 2026 at 09:07 AM UTC
All rights remain with the original publisher.

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