Last updated May 29, 2026
CommonGround is an independent project that matches you with a stranger to discuss one debatable statement. This page explains what we collect, why, and how you can remove it. We collect as little as the product needs to work.
Account. Your email address, used to sign you in (we send a one-time link — there is no password to store) and to contact you about your account.
Profile. A display name and the timestamp you joined.
Activity. The statements you choose to discuss and your stance on them, the messages you send in a conversation, your reactions, your per-round stance votes, and any optional private reflections you write.
Technical. A small number of anonymous, cookieless product-analytics events (for example "onboarding completed", "message sent") so we can understand whether the product works. These carry no message contents.
To run the service: sign you in, match you with someone who holds a different view, deliver your conversation in realtime, and show you how your positions moved at the end. We do not sell your data or use it for advertising.
Some partners on CommonGround are AI bots rather than people. When you are matched with a bot, the messages in that conversation are sent to our model provider (Groq) to generate replies. Treat any conversation as you would with a stranger and avoid sharing sensitive personal information.
Data is stored in a Postgres database hosted by Supabase, protected by row-level security. In practice that means your messages are visible only to you and the one person in that conversation; your private reflections are visible only to you; and your stance history is your own. Profiles are not public — conversations are anonymous by design.
We rely on a few providers, each limited to its purpose: Supabase (authentication, database, realtime), Resend (sending sign-in and contact emails), Groq (generating AI partner replies), and Vercel (hosting and privacy-friendly, cookieless traffic analytics).
We use a single category of cookie: the secure, HttpOnly session cookie that keeps you signed in. Traffic analytics are cookieless, so there is no tracking cookie and no consent banner to dismiss.
You can delete your account at any time from your profile. Deletion is immediate and irreversible: it removes your account and cascades to everything tied to it — your profile, propositions and stances, messages, reactions, votes, and reflections. Anonymous analytics events are retained but are no longer linked to you.
You can access the data you've created through your profile and results pages, and you can erase all of it via account deletion. For anything else, reach out below.
CommonGround is not intended for anyone under 16. Please don't use it if you are younger than that.
If this policy changes, the "last updated" date above will change with it. Material changes will be reflected here before they take effect.
Questions about your data? Use the contact form.