Compare software

notmuch vs mblaze: catalog facts
notmuch	mblaze
Free Free to download and use.	Free Free, with the source code published on GitHub.
Command line	macOS, Linux, Command line
Fast global search across very large mail archives Tag-based organisation instead of folders	Small composable commands that work in shell pipelines Works directly on standard Maildir folders
Not a complete mail client on its own; needs a front end and a way to fetch mail Suited to terminal and editor users rather than beginners	No graphical or full-screen interface Needs a separate program to fetch and send mail
Downloadable app	Downloadable app
Open source	Open source
License not stated	License not stated
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked October 1, 2026

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