**Google** is now offering end-to-end encryption (E2EE) on all Android and iOS devices, providing enterprise users with the ability to read and compose emails without the need for supplementary tools. This enhancement is designed to simplify secure communication and enhance data privacy. ### Seamless Encrypted Messaging Starting this week, encrypted messages will be delivered as standard emails to **Gmail** recipients' inboxes, provided they are using the **Gmail** app. Recipients using other email services can access these messages via a web browser, ensuring accessibility across different devices and platforms. ### Key Features and Benefits "For the first time, users can compose and read these E2EE messages natively within the **Gmail** app on Android and iOS. No need to download extra apps or use mail portals. Users with a **Gmail** E2EE license can send an encrypted message to any recipient, regardless of what email address the recipient has," **Google** announced on Thursday. "This launch combines the highest level of privacy and data encryption with a user-friendly experience for all users, enabling simple encrypted email for all customers from small businesses to enterprises and public sector." ### Availability and Requirements This feature is available for all client-side encryption (CSE) users with Enterprise Plus licenses and the Assured Controls or Assured Controls Plus add-on. Administrators need to enable the Android and iOS clients in the CSE admin interface via the Admin Console. To send an end-to-end encrypted message, **Gmail** users must activate the "Additional encryption" option by clicking the Lock icon when composing the message.  *Writing E2EE messages and reading them without the app (Google)* ### Background on Gmail E2EE In October, **Google** announced that **Gmail** enterprise users could send end-to-end encrypted emails to recipients on any email service or platform. **Gmail's** E2EE feature is powered by client-side encryption (CSE), allowing **Google Workspace** organizations to use encryption keys they control, stored outside **Google's** servers. This protects sensitive documents and emails. Messages and attachments are encrypted on the client before being sent to **Google's** servers, aiding compliance with regulations like data sovereignty, HIPAA, and export controls. This ensures that **Google** and third parties cannot access the data. **Gmail** CSE was introduced in **Gmail** on the web in December 2022 as a beta test, following an initial beta rollout to **Google Drive**, **Google Docs**, **Sheets**, **Slides**, **Google Meet**, and **Google Calendar**. It reached general availability for **Google Workspace** Enterprise Plus, Education Plus, and Education Standard customers in February 2023. **Google** began rolling out its new end-to-end encryption (E2EE) model in beta for **Gmail** enterprise users in April 2025.