Data retention
How long rows are kept
Event rows are retained so your historical charts keep working. There is no automatic expiry that deletes old events on a schedule.
What does not persist is identity. The visitor hash is derived fresh each day and rotates at UTC midnight (see Cookieless identity), so even though a pageview row is kept, the hash on it cannot be tied to a person or connected to any other day's rows.
Deleting a site
Deleting a site removes its data. When you delete a site from your account, Kymo cascade-deletes every row tied to that domain — events and the derived AI-visibility tables — not just the site record.
This is deliberate. Domains change hands. Cascade-deleting means if a domain is later registered by a different account, the previous owner's traffic can never appear under the new owner's dashboard.
Excluding versus deleting
Excluding your own traffic (via ?kymo=ignore or a per-site excluded IP) prevents new events from being stored. It does not remove events already recorded. To remove data, delete the site.
There is no fixed retention window today — Kymo does not purge events on a schedule. Rows are kept until you delete the site.