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Privacy & Security ​

Dalton prioritizes data privacy and security in all A/B testing operations.

Dalton automatically detects consent and supports almost all cookie banners out-of-the-box. Cookies are only written once analytics/performance consent is granted.

Anonymous experiment data is held in browser storage (localStorage/sessionStorage) so visitors get a seamless, consistent experience during their session — even before they accept cookies. This storage contains no personal data.

Cookies Used ​

Dalton sets two first-party cookies (Secure, SameSite=Lax), only after analytics consent:

dalton_session_id_<customer_id> ​

  • Purpose: Anonymous session identifier for experiment consistency
  • Data Stored: Random session ID plus the experiment/variation IDs the visitor is enrolled in (no personal information)
  • Expiration: 24 hours
  • Domain: Your website domain

dalton_device ​

  • Purpose: Anonymous device identifier for consistent experiences across visits
  • Data Stored: Random device ID (no personal information)
  • Expiration: 24 hours
  • Domain: Your website domain

For the full list of cookies and browser storage, consent integration, and the domains to allow in your CSP, see Cookies & Storage.

What We Collect ​

  • Anonymous identifiers: Random strings to maintain test consistency
  • Experiment participation: Which tests a user is enrolled in
  • Variation assignment: Which version of a test the user sees
  • Conversion events: Anonymous goal completions and interactions
  • Click events: Anonymous clicks on your web pages
  • Scroll events: Only tracked on pages with live experiments

What We DON'T Collect ​

  • Personal information: No names, emails, IP addresses, or identifying data
  • Cross-site tracking: Cookies are limited to your domain only

Data Storage ​

All Dalton data is processed and stored exclusively within the European Union. The primary data zone is eu-central.

Stored data includes:

  • Anonymous session IDs and device IDs
  • Experiment participation records
  • Conversion rates and goal completions
  • Experiment content and aggregate insights

Questions? ​

For privacy or security questions, email us at info@getdalton.com

View our full Privacy Policy