WhatsApp has rolled out a new beta feature called Scam Alert, designed to identify suspicious messages from unknown senders. This optional tool uses machine learning to flag potential scams, working alongside WhatsApp’s end-to-end encryption rather than undermining it.
The feature is available for select users in a limited beta rollout, and once enabled, a model is downloaded to the device to evaluate incoming messages for patterns associated with known scams. The classification process happens entirely on-device, without any automatic reporting to WhatsApp or its parent company Meta. If a message is flagged as suspicious, only the recipient sees a warning inside the chat, but the sender remains unaware.
The user can then choose what action to take: block the contact, report the message, ignore the warning, or mark the conversation as trusted so future alerts are suppressed. Interestingly, users who mark a chat as trusted can opt to share the last five messages received with WhatsApp, helping refine the model’s accuracy over time.
To prevent any potential issues, WhatsApp has implemented several security measures. Every new model release must be logged on a third-party transparency ledger before it can be distributed. This ensures that each update is publicly recorded and auditable. The company also built a confidential federated analytics pipeline to gauge whether the feature is functioning correctly without exposing sensitive user data.
The pipeline collects only two categories of data: counts of how often warnings were triggered and what actions users took afterward, such as blocking or marking a chat as trusted. This approach aims to prevent external attackers from targeting individual users by compromising the entire system.
For added transparency, WhatsApp has included a feature that allows users to review a log of messages scanned for scams, along with the outcome and model version used. The company is also expanding its bug bounty program to cover Scam Alert and has stress-tested the system before releasing it in beta.
While this new feature is an early technical preview rather than a finished product, WhatsApp’s efforts to combat scams are a significant step forward in maintaining user trust and security. As the platform continues to evolve during the beta period based on researcher and user feedback, we can expect even more robust measures to protect users from potential threats.
For those interested in enabling Scam Alert, it is essential to understand that this feature works alongside existing security protocols rather than undermining them. This approach ensures that WhatsApp’s commitment to end-to-end encryption remains intact while providing an additional layer of protection against scams.
Ultimately, the success of Scam Alert will depend on user feedback and continued development by WhatsApp. As users begin testing this new feature, it is crucial to report any issues or concerns directly to the company to help refine the model’s accuracy and effectiveness in identifying suspicious messages. By doing so, we can all contribute to creating a safer online environment for everyone.
As a practical takeaway, consider enabling Scam Alert in your WhatsApp account if you’re eligible for the beta rollout. Even though this feature is optional, it represents an important step forward in protecting users from potential scams and maintaining trust in the platform.
Source: SecurityWeek — 2026-08-12