EmailSlim vs InboxSweeper

EmailSlim is a web service for finding storage-heavy messages in Gmail and Microsoft email accounts and cleaning them up. It analyzes metadata rather than email body content, ranking senders and domains by the total storage their messages use. Users can inspect grouped senders and approve bulk deletions; messages first move to Trash or Deleted Items. One-click unsubscribe uses standard List-Unsubscribe headers when available, though it may not work for every sender. Supported accounts include Gmail, Outlook, Hotmail, Live.com, MSN, and Microsoft 365. Connections use Google OAuth or Microsoft OAuth, and access can be revoked in account settings. EmailSlim says operations require explicit user consent and initiation. It describes encryption in transit and at rest, access controls, and regular security audits. The free scan costs nothing and covers the first 500 emails without a credit card or subscription. Paid pricing is from $2.50/mo. One-time, annual, and monthly automation plans use mailbox tiers up to 150k emails, with exact amounts shown after sign-in. Monthly automation is described as daily inbox cleanup.

InboxSweeper is a free, open-source tool for clearing old promotional mail and newsletters and unsubscribing from mailing lists. It supports Gmail fully; Yahoo and other IMAP inboxes are experimental. Choose among three sweep modes: Sloth targets mail older than two years, Normal mail older than one year, and MadMax includes recent promotional mail. Their respective run caps are 25, 50, and 100 senders. Before moving messages, sweeps show counts; financial, security, payment, receipt, and government mail is protected. You can unsubscribe, move selected messages to Trash, or report senders as spam. Trash messages are described as recoverable for about 30 days. One-click and mailto unsubscribe options are supported; web-link-only options are flagged for manual handling. The tool runs on your computer and says it does not upload mail, credentials, or tokens. It offers a local browser interface, Windows executable, terminal CLI, and AI-agent instructions. It uses a scoped app password rather than Google OAuth, with credentials stored in macOS Keychain or a locked file.