GMClean vs Inbox Zapper

GMClean is a free, self-hosted web tool for scanning email headers, classifying messages, unsubscribing in bulk, deleting email, and exporting data. It works with Gmail, Outlook, and custom IMAP mailboxes, with up to 10 mailboxes connected at once. GMClean fetches headers such as sender, subject, and List-Unsubscribe details without downloading message bodies. It can scan INBOX, Spam, Promotions, Trash, and other IMAP folders. Inbox analysis includes a 0–100 health score based on five weighted factors, sender insights, and email age distribution. Classification uses heuristic rules, with optional Gemini assistance for ambiguous cases. Users can unsubscribe with one click using RFC 8058 support or unsubscribe in bulk; bulk deletion runs in batches of 500 messages. Exports include selected subscriptions with resubscribe links and scanned emails in CSV format. The project documents deployment with npm, Docker, or Docker Compose. It says app data stays in browser IndexedDB and there is no cloud database or telemetry. Credentials are encrypted with AES-256-CBC before storage, and setup requires an ENCRYPTION_SECRET. The repository is MIT-licensed.

Inbox Zapper has no write-up on Specifiction yet; its figures are above.