reCAPTCHA will migrate to Google Cloud by the end of 2025, requiring users to set up a Google Cloud account and billing for migration. The transition involves significant changes, including a new pricing structure, renamed APIs, and client-side adjustments, while automatic migration options are available but may not be ideal for all users.

Yahoo Mail is migrating its application to Google Cloud using a multi-tenant Google Kubernetes Engine (GKE) platform, incorporating a combination of lift-and-shift and strategic replatforming. The design emphasizes high availability, efficient workload management, and robust security measures, while addressing technical challenges throughout the migration process. The collaboration between Yahoo and Google aims to optimize the mail system for future demands.