# imapsync alternative: IMAP migration without installing anything

> imapsync is a widely used open-source command-line tool for copying IMAP mailboxes. IMAP Migrator does the same job from the browser: no server to set up, no scripts, many accounts in parallel and live progress.

| | IMAP Migrator | imapsync |
|---|---|---|
| Setup | None, runs in the browser | Installed on a server with Perl and its modules |
| How you use it | A form, a CSV or invitation links | Command-line options per account |
| Parallel accounts | Built in, with concurrency settings | Through your own scripts |
| Resume after interruptions | Automatic, per message | Skips duplicates when run again |
| Monitoring | Live action log, reports, notifications | Terminal output and log files |
| Calendars and contacts | Over CalDAV/CardDAV | Email only (IMAP) |
| Flexibility | The common options | A very large set of fine-grained options |

## When IMAP Migrator fits better

- You want to move mail quickly without running a server
- You track many accounts for colleagues or clients
- You want people to enter their own passwords

## When imapsync fits better

- You prefer running everything on your own server with scripts
- You need very specific IMAP options

**Does IMAP Migrator use imapsync?** No. It has its own migration engine and is not affiliated with imapsync.

**Can I continue a migration I started with imapsync?** Yes. "Skip existing" recognises messages already on the target by Message-ID and does not copy them again.