Privacy policy

Short, because the list of things we hold is short.

What we collect

• Account: your email address and a salted hash of your password (never the password itself).
• Session: one cookie that keeps you signed in. No advertising cookies, no third-party trackers.
• Membership: your plan, its status, and its renewal date, kept in step with Stripe.
• Email list: if you join the launch-email list, your email address and when you joined.
• Security: sign-in attempts are logged briefly to slow down password guessing.

What we never see

Payments are handled end to end by Stripe. Your card number never touches our servers and is never stored by us. We receive only confirmation that a payment succeeded or failed, and the identifiers needed to keep your membership in step with your subscription.

What we never do

We do not sell your information. We do not share it with advertisers. We do not connect to your Kalshi account, your brokerage, or your bank — QuarterLine has no access to any of them and never asks for those credentials.

How long we keep it

Account and membership records are kept while your account exists. If you cancel, your access runs to the end of the paid period; the account record remains so a later resubscription can restore your place, unless you ask for it to be deleted.

Your choices

You can cancel your membership anytime from your account page. Launch-list emails are announcements only — reply to any of them and you are off the list.