Cookie notice
Last updated August 20, 2026
This notice explains the cookies and similar technologies Suppose uses. It is short because the list is short.
Mostly Magic, Inc. (“Suppose,” “we,” “us,” or “our”) uses cookies and similar technologies on letssuppose.com and the hosted product. This notice is part of our Privacy policy.
What cookies are
Cookies are small data files stored on your device when you visit a site. Some last only while the browser is open. Others stay until they expire or you delete them. First-party cookies come from Suppose. Third-party cookies come from another company. We also use related storage in the browser, such as localStorage and sessionStorage. Those are not cookies, but they can remember a preference the same way.
What we use
We do not use advertising cookies. We do not use social-login cookies while Google and Apple sign-in are not offered. We do not show a cookie banner or a cookie dashboard. The real choices are your browser controls and, for session replay, Settings.
| Type | What it does | Who | How to control it |
|---|---|---|---|
| Essential | Keeps you signed in, completes two-factor checks, and remembers a Board link password when you unlock a shared Board. Cloudflare may also set cookies needed to deliver and protect the site. | Suppose (privacy policy); Cloudflare (privacy policy) | Required for the signed-in product. You can block cookies in your browser; you may need to sign in again, and some features will not work. |
| Analytics | Helps us see whether people reach a useful Board, return, share, hit errors, or find a feature helpful. Designed to be cookieless: no PostHog cookie and no persistent anonymous analytics identity in browser storage. Capture stays off unless a production environment has the required PostHog configuration. Marketing pages never build a person profile. Events do not include Board content, prompts, or campaign or referrer data. | PostHog Cloud US, when capture is enabled (privacy policy) | There is no analytics cookie to refuse. Our analytics configuration honors Do Not Track. Blocking third-party scripts in your browser will also stop it. |
| Functionality | Remembers first-party preferences on your device: light or dark theme, last workspace, a guest name on a shared Board, and a local replay opt-out latch. Theme lives in localStorage, not a third-party cookie. Marketing pages do not store a theme. | Suppose, on your device | Change theme and replay in Settings, or clear site data in your browser. |
Other technologies
Browser storage. The homepage playground saves edits in session storage only. Closing the tab is the retention policy. Those edits are not sent to our servers.
Session replay. PostHog session replay is an invitation-beta program for eligible U.S. accounts on private authenticated surfaces. Recordings are heavily masked before they leave the browser. Replay can be turned off in Settings. Retention is 30 days. Replay stays off unless every eligibility check passes. This is not FullStory, and we do not describe replay as currently on just because the code exists.
Fonts. Marketing pages load the Fraunces typeface from Google Fonts. Google may see that request. The signed-in product does not use Google Fonts for its interface.
We do not use Flash cookies. We do not use mobile advertising SDKs. We do not embed advertising pixels. Transactional email from Suppose does not include an open-tracking pixel.
Your choices
Browser controls. Most browsers let you delete or block cookies. If you block essential cookies, you may need to sign in every visit, and shared-Board passwords may not stay unlocked.
Session replay. If your account is eligible, turn replay off in Settings. The rest of the product keeps working.
We do not offer a cookie preference banner or dashboard, and we do not participate in advertising industry opt-out programs, because we do not run interest-based ads.
For the rest of our practices, see the Privacy policy.
Changes
If the cookies or similar technologies we use change in a way that matters, we will update this page and the date at the top.
Questions
Write to support@letssuppose.com. A person reads it.