I had over 100,000 emails in my inbox and built this to deal with it.
Ciela scans your Gmail and groups every sender into categories — marketing, receipts, newsletters, security alerts, and more. You can trash everything from a sender in one click, with a date filter to protect recent emails and only remove the old backlog.
Everything runs locally. No servers, no account, no subscription. The only connections it ever makes are to Gmail's own API. Backend is Rust.
Free. Windows only for now.