Make people pay to get into your inbox
Captchainbox is a service designed to filter email inboxes by requiring unknown senders to solve a CAPTCHA or pay a fee to ensure their message is delivered. The platform aims to reduce AI-generated spam while ensuring legitimate communications from trusted contacts are prioritized.
Why it matters
As AI-driven outreach increases, traditional spam filters are becoming less effective, necessitating new tools to manage digital communication overload.
Stop AI spam from flooding your inbox and calendar. Unknown senders solve a CAPTCHA or pay a fee to get in. Trusted contacts get through as usual.
Gmail Outlook Other Soon See how it works 7-day free trial · 5-minute setup · Archived, never deleted
I am human Deliver my message Mail Search mail Live Compose Inbox 3 Archived 2 Trusted 284 Inbox Archived 2 Trusted 284 SC Sarah Chen
Inbox · just delivered 3 items SC Sarah Chen
Sarah Verified sender 2 awaiting verification Proceedings are donated to
Pooled and donated annually, 50/50. See the ledger .
Built for inboxes overwhelmed by AI outreach
Spam filters catch the obvious, but mass-customized outreach gets through. You miss what matters and drown in what you didn't ask for.
Captchainbox scans your conversation metadata. We never read your messages. We build a trusted sender and domains list for you.
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