Google Workspace to Proton Migration Guide (2026)

Migrating from Google Workspace to Proton is a business-process change, not just a mailbox transfer. Email, calendars, shared files, identity, third-party apps and recovery workflows may each have a different owner. The safest first step is a small pilot that tells you which dependencies cannot move cleanly.

For the purchase decision, read the Proton Workspace review and current pricing guide. The migration should proceed only after a real team can complete its daily tasks in the selected Proton plan. Proton's Easy Switch for Business instructions are the authoritative sequence for the current migration wizard.

What Easy Switch moves, and what it does not

Do not assume that “Easy Switch” transfers Drive, shared-drive permissions, automations or every native Google document behavior. Google offers an organization data export tool for a broader archive; its prerequisites and output differ from Proton's Drive import workflow. Choose an export method appropriate to the data and test restoration before changing a production system.

Phase 1: make the dependency map

Inventory domains and DNS control, users, aliases, groups, shared mailboxes, calendars, Drive folders, Google-native files, mobile devices and applications that send or receive mail. Give each dependency an owner. Mark anything that cannot be recreated immediately as a cutover blocker, not a task to discover afterward.

Select the current Proton plan, then check users, storage, domains, password-manager and VPN entitlements. Proton Workspace Standard includes a broad suite, but the presence of Pass or VPN does not prove that every standalone Professional capability is included. Keep a written quote and the existing-provider cancellation date in the same worksheet.

Phase 2: run a representative pilot

Use a test domain or a small group while Google mail routing remains active. Proton's business wizard requires a Proton administrator, a Google Workspace administrator and domain-provider access. Its documented sequence covers configuration, Google authentication, the migration app, domain configuration, user mapping and the final step. Have the administrators follow the current vendor instructions, including review of the requested Google app permissions.

Pilot at least one large mailbox, an external-calendar user, an operations mailbox and an employee who uses several devices. Verify imported data in Proton, rather than counting a migration status alone as success. Ask users to send and receive mail internally and externally and exercise common attachments and invitations.

Phase 3: move files and rebuild sharing

Proton's Drive import guide describes exporting Drive data with Google Takeout, downloading all archive parts, then uploading through the Proton Drive desktop or web app. The desktop app is documented as the more resilient route for large or numerous files. Keep the original export until file counts, contents and permissions are checked. Shared drives and Google-native files require extra ownership and format review; do not assume a personal Takeout archive covers every organizational file.

For a sample, compare the source and destination of a complex spreadsheet, a document with comments and an externally shared folder. Record what must remain in Google, be rebuilt or use a different tool. If a critical workflow fails, pause the migration instead of forcing a company-wide move.

Phase 4: activate users, then change MX

Proton's wizard invites migrated users to verify through their existing Gmail inbox and set a Proton password. Its documentation warns that after the migration is finalized, invitation links stop working and unactivated people need administrator help. Confirm activation before changing mail routing. Provide a new-login guide, MFA setup and a support contact.

Schedule DNS work with the domain owner. Use Proton's current wizard-provided records, rather than copying values from a third-party article: SPF, DKIM, DMARC and MX must reflect your actual mail senders and transition plan. Proton's documented final step changes MX to route new mail to Proton; do this only after inbound/outbound tests, rollback contacts and an overlap window are ready. DNS propagation and import completion vary; a fixed “one-to-seven-day” promise is not defensible.

Phase 5: verify and retire safely

For the first days after cutover, check mail flow from several external providers, spam/quarantine behavior, calendar invitations, mobile access and third-party senders. Reconcile mail received during the transition. Keep the old Workspace account and export available for the agreed validation period. Disable or cancel it only when the business owner confirms records, users and workflows are complete and any retention obligations are addressed.

Sources checked September 24, 2026: Proton Easy Switch for Business, Proton Drive import, Google Workspace organization export, and Proton Workspace plans. This is documentation-based planning, not a tested migration or compliance determination.