Compare software

lieerisync
Free

Free and open source under the GPL-3.0 or later.

 Free

Free and open source under the GPL.

macOS, Linux, Command line Windows, macOS, Linux, Command line
  • Two-way sync between Gmail labels and notmuch tags
  • Keeps a full local maildir copy of the mailbox
  • Much faster than Python-based synchronisers on large mailboxes
  • Precise control over which folders sync and in which direction
  • Only works with Gmail accounts
  • Requires notmuch and command-line setup
  • Configuration syntax is terse and mistakes can delete mail
  • Command line only
Downloadable app Downloadable app
Open source Open source
License: GPL-3.0-or-later License: GPL-2.0
Account needed Not stated if an account is needed
Works offline Not stated if it works offline

Checked October 1, 2026

Checked September 22, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.