In a major shift driven by the EU’s Digital Markets Act (DMA), WhatsApp is preparing to introduce “third-party chats,” allowing users to communicate with people on other messaging apps. This marks the first time WhatsApp will open its platform for interoperable messaging, fundamentally reshaping how users connect across digital services.

The feature will launch in Europe first, on both Android and iOS.

How Third-Party Chats Will Work

WhatsApp’s new interoperability feature will be completely optional. Users can enable it through a dedicated settings section that explains how cross-app messaging works. Once turned on, people can chat with contacts on approved third-party services without switching apps.

Chats can appear in a separate inbox or be merged with regular WhatsApp conversations, depending on user preference. Initially, only one-to-one conversations will be supported.

Security Remains the Core Requirement

WhatsApp insists that interoperability will not compromise security. Third-party apps must implement end-to-end encryption protocols that match WhatsApp’s standards. Only after passing technical validation will an app be allowed to interoperate on the platform.

To ensure transparency, WhatsApp will clearly label chats involving external apps, and users will receive notifications when new third-party integrations are added.

What Features Will Be Available at Launch

The initial rollout will support:

• Text messages


• Images and videos


• Voice notes


• Document and file sharing

However, WhatsApp-specific features like stickers, statuses, disappearing messages, and advanced privacy tools may not work in cross-app chats during the first phase.

Group messaging with third-party users will roll out later once partner apps meet the necessary technical standards.

Who Gets Access and Which Apps Are Involved

The DMA applies only to the European Economic Area, so the feature will be EU-exclusive for now. WhatsApp has not confirmed if interoperability will expand globally.

The first apps to meet technical compliance are BirdyChat and Haiket, with more expected as companies update their encryption systems to align with WhatsApp’s requirements.

Why This Matters

This move is a milestone for digital regulation and user freedom. Interoperability allows people to stay on WhatsApp while messaging friends who use other apps—reducing fragmentation and app-switching fatigue. It also sets a new precedent for secure cross-platform communication, potentially influencing regulations far beyond Europe.

As the rollout progresses, WhatsApp’s implementation could become the global template for messaging interoperability in the years ahead.

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