How Rythm actually works
A step-through of what happens when an unknown sender hits the door.
Setup is built around a 12-minute path. Connect Gmail or Outlook in 10 seconds. The auto-scan builds your guest list from contacts, sent folder, starred messages, and inbox frequency over the next 8 to 10 minutes. Set your cover charge (default about four cents). Connect a wallet (Cash App, Strike, Blink, Primal, or another supported wallet) so the cover charge each unknown sender pays lands directly to you. Done.
The field notes below cover what is happening under the hood: how the guest-list-plus-cover-charge model works, why we never hold your money or store your email content, and what an unknown sender actually sees when they hit the cover charge. Read the technical evaluation guide if you are vetting Rythm against an enterprise gateway alternative. The big day is the founder day-of-launch post; it captures the why behind the install.
If anything in the setup flow feels unclear, the field notes go deeper than the in-product copy can. They are also useful to share with a teammate or an EA who will be running guest-list management for you.
Non-custodial architecture
A founder note on what it took to build the protection layer with no custody.
Why we chose deterministic filtering
The decision tree behind the dual-layer filter and why ML is not in it.
Rules, not guesses
The difference between probabilistic and deterministic systems in the inbox.
What is an email paywall
A plain-English definition of the term and the difference between Rythm and the precursors.
What is economic email filtering
The new category Rythm fits in: filtering on cost rather than content.
What senders see (default rejection email)
The exact copy a first-time sender encounters when they hit the cover charge.
Will prospects be annoyed by the cover charge
The honest answer to a question every Rythm user asks before installing.
Technical evaluation guide
A walkthrough for IT and security reviewers evaluating Rythm against the gateway alternatives.
The big day
A founder note from launch day. The why behind the install.
One plan. One price.
Keep your existing Gmail or Outlook. Cancel anytime.
$1.65
per month
Annual on Lightning includes one bonus month. See full pricing.