Sean Dudgeon

Rythm is an email paywall for Gmail and Outlook. Two checks stand between your inbox and the outside world. First, your guest list: Rythm auto-generates it for you at setup, and it keeps updating naturally as you use your email. Known senders walk right in. Second, a small cover charge you set (about four cents by default) for everyone else. Unknown senders either pay, or wait in line for you to review them. The money settles straight to your wallet. We never hold your money. Starting at $1.65 per month, cancel anytime. Keep your existing inbox. Protecting inboxes since 2025.
https://rythm.xyz