Three surfaces are concerned: the marketing site (ferrgrowth.com), the FerrGrowth app (app.ferrgrowth.com), and the customer marketing sites built with FerrGrowth.
ferrgrowth.com
No cookie set by FerrGrowth itself. The shared FerrLabs IdP cookies (see canonical cookie policy) only appear if you sign in.
FerrGrowth app (app.ferrgrowth.com)
The app stores in localStorage:
ferrgrowth_token— session JWT cache for instant UI render after reload.ferrgrowth_ui— UI preferences (sidebar, density, …).
Customer sites built with FerrGrowth
By default, customer sites set no cookie. The FerrGrowth analytics pipeline derives visitor identifiers from a daily-rotated, salted HMAC of the IP + user-agent — no cookie, no localStorage, no cross-day persistence.
If you (the site owner) add third-party scripts (chat widget, video embed, marketing pixel), those may set cookies under their own policy. Adding them is your choice and falls under your responsibility to display the appropriate cookie banner.
French version: Cookies.