MailwynxSelf-hosted migration platform
Migrations that don't stop at the mail.
Mailwynx moves mailboxes between Microsoft 365 and Google Workspace — mail with its full folder structure, calendars with recurrences and attendees, and personal contacts, in one pass. Runs inside your own environment, so client data never touches a third-party cloud.
Built for MSPs and IT teams running repeat migrations.
Works with the platforms you already migrate
Why Mailwynx
Three reasons MSPs switch to it
Most migration tools were built to sell seats, not to make your engineers' lives easier. Mailwynx is built the other way round.
Runs in your environment
Deploy Mailwynx on your own server or a client tenant. Mailbox data moves API-to-API and never passes through anyone else's cloud — the answer to every data-residency question a client will ask.
Calendars and contacts come too
Calendars keep their recurrences, attendees and reminders. Personal contacts keep their phone numbers, addresses and notes. Mail keeps its folder structure and read/flag state. The pieces cheaper mail-only tools leave behind are exactly what Mailwynx moves in the same pass.
Flat pricing, no per-seat tax
Buy mailboxes in simple packs — $199 for 100, $449 for 300 — and top up the same key when you need more. No subscription, no per-project quotes, just a low cost-per-mailbox that stays yours.
The difference
What survives the move
- Mail copies over, calendar and contacts don't
- Recurring events and attendees flattened or lost
- Data routed through the vendor's servers
- Priced per mailbox, every single project
- Mail, calendar and contacts in one pass
- Recurring events, attendees and reminders preserved
- Self-hosted — data stays inside your perimeter
- Pay-once mailbox packs, top up anytime
From zero to migrating
Four steps, one afternoon
No agents on every desktop, no ticket queue with a vendor. Connect both tenants and go.
Deploy Mailwynx
Run it on your own Windows machine — a single app, no server role and no public exposure required.
Connect source & destination
Authorize both tenants over their native APIs. Mailwynx maps users automatically and lets you fix any mismatches.
Run a pilot batch
Migrate a handful of mailboxes, verify mail, calendars and contacts landed, then schedule the rest in waves.
Cut over & verify
Delta-sync the final changes, flip MX, and hand the client a clean completion report.
Stop rebuilding what the last tool dropped.
See a live migration carry a full mailbox — mail, calendar and contacts — from Google Workspace into Microsoft 365 in one pass.