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Himalaya vs meli: catalog facts
Himalaya	meli
Free The open-source software is available without a license fee. Hosting, hardware and…	Free Free and open source under the GPLv3.
Windows, macOS, Linux, Command line	macOS, Linux, Command line
Supports several mail protocols and local mailbox formats.	Supports IMAP, Maildir, notmuch, JMAP and mbox Plain text configuration with sane defaults
Mail authentication and account configuration are required.	Described by its developers as experimental Non-UTF-8 encodings are read-only
Downloadable app	Downloadable app
Open source	Open source
License: MIT OR Apache-2.0	License: GPL-3.0
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked September 23, 2026

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