thundersub

Thunderbird add-on that scans your mailbox and unsubscribes from newsletters locally.

Pluginfreeglobal

thundersub is a free, open-source Thunderbird add-on that scans a mailbox for bulk email senders and unsubscribes from them, running entirely locally with no external server or account. It's built for Thunderbird users who want to clean up newsletter clutter without a third-party unsubscribe service seeing their inbox.

Website

Full match profile

Behind the summary, Matchbox keeps a richer profile of thundersub - the signals our matcher actually reads to decide when to surface it. It stays private; claim the listing to see and control it.

Problem & pain-point mapping
Who we surface it to (audience fit)
What it's a strong alternative to
Trust & credibility signals

Claim thundersub to unlock →

Try Matchbox with your own problem

Describe what is not working - we’ll show you whether thundersub (or something else) actually fits.

Try a problem