Cookie Policy
Trialcraft BV (trading as Studia)
Last Updated: 11/02/2026
1. Introduction
This Cookie Policy explains how Trialcraft BV ("we", "us") uses cookies, local storage, and similar technologies when you visit our website (studia.health) and use our software platform.
2. Scope: Public Site vs. Platform
To protect your privacy, we apply different rules depending on how you interact with us:
We use PostHog for anonymous website analytics on our public site. PostHog is only activated if you explicitly accept analytics cookies via the banner displayed on your first visit. If you decline or take no action, no cookies are set and no data is collected. You can browse our homepage completely anonymously.
When you log in to use our services, we use specific technologies to ensure the security of your session, manage your workspace state, and (if you consent) analyze platform performance.
3. Cookies and Local Storage Used on the Platform
We differentiate between technologies essential for the platform's security ("Strictly Necessary") and those used for preferences or analytics.
3.1. Strictly Necessary Cookies
These cookies are mandatory. They handle your login session across our Django backend, Next.js frontend, and Streamlit analysis tools. You cannot turn these off.
| Name | Service / Context | Purpose | Expiry |
|---|---|---|---|
sidebar_state | UI Preferences: Remembers if you collapsed the sidebar so you don't have to reset it every time. |
3.2. Local Storage (Functional Data)
We use your browser's Local Storage to save your workspace context and UI preferences. This data stays on your device to make your workflow smoother.
| Key Name | Purpose |
|---|---|
api-key | Stores a temporary authorization key to allow your browser to communicate with our secure API without re-entering credentials. |
organization_id / organization_name | Remembers which organization workspace you are currently active in. |
study_id / study_name | Remembers the specific clinical study you were last working on. |
username | Displays your name in the interface. |
studia-chat-panel-* | UI Preferences: Remembers if you collapsed the chat panel so you don't have to reset it every time. |
3.3. Analytics Cookies (Optional)
We use Hotjar to understand how users interact with our Platform. These are only set if you explicitly accept them.
| Name | Provider | Purpose | Expiry |
|---|---|---|---|
_hjSessionUser_{site_id} | Hotjar | Persists the Hotjar User ID, unique to that site on the browser. | 365 Days |
_hjSession_{site_id} | Hotjar | Holds current session data. | 30 Mins |
For more details on Hotjar cookies, please visit the Hotjar Official Documentation.
3.4. Public Website Analytics Cookies (Optional)
We use PostHog to understand how visitors interact with our public website. These cookies are only set if you explicitly accept them via the cookie consent banner.
| Name | Provider | Purpose | Expiry |
|---|---|---|---|
ph_{token}_posthog | PostHog | Stores an anonymous session identifier and consent status for website analytics. | 1 Year |
For more details on PostHog cookies, please visit the PostHog Privacy Documentation.
4. Contact Us
If you have any questions about our use of cookies or local storage, please contact us at:
Email: privacy@studia.health