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Mailstrom vs Cleanfox: catalog facts
Mailstrom	Cleanfox
Paid Paid service with a free trial that needs no credit card.	Free Free to use; funded by selling statistical data derived from scanned emails.
Web	Android, iOS, Web
Bulk delete and unsubscribe across thousands of messages Works with Gmail and other providers	Bulk unsubscribe and delete in one step Works with Gmail, Outlook and other mailboxes
Requires granting a third-party service access to your mailbox Paid after the trial	Scans your mail and sells statistics derived from it Needs access to your mailbox
Hosted service	Downloadable app, Web application
Closed source	Closed source
License not stated	License not stated
Account needed	Account needed
Needs internet	Needs internet
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 2, 2026

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