Zero-party data is information a customer intentionally and proactively shares with a brand, preferences, purchase intentions, personal context, a term coined by Forrester Research specifically to distinguish explicitly volunteered data from data inferred by observing behavior.
A simple answer to what is zero-party data worth remembering: it’s stated, not guessed, which is the entire distinction the term was created to capture.
Stated Directly, Not Inferred
Zero-party data vs first-party data comes down to a genuinely useful distinction, even though zero-party data is technically a subset of the broader first-party data category covered elsewhere in this glossary:
- First-party data, in its behavioral sense, is inferred from what a customer does, browsing patterns, purchase history, time spent on a page, collected passively without the customer explicitly stating anything.
- Zero-party data is stated directly, a customer answering a quiz question, filling out a preference survey, explicitly telling a brand what they’re interested in.
A customer browsing the running shoes category three times generates first-party behavioral data, an educated guess about interest. That same customer typing “I’m shopping for running shoes” into a preference quiz generates zero-party data, a direct statement rather than an inference.
Zero-Party Data Examples
- A style or preference quiz — “which of these best describes your skin type?” on a skincare brand’s signup flow.
- A preference center selection, covered elsewhere in this glossary, where a subscriber explicitly chooses which product categories they want to hear about.
- A direct survey question — “what brought you here today?” asked at signup, capturing stated intent rather than guessed intent.
- An account setup field — a customer explicitly selecting their size, style preference, or gift-giving occasions during onboarding.
How to Collect Zero-Party Data Without It Feeling Like an Interrogation
How to collect zero-party data well usually means offering something in return for the effort, a values-forward brand might get some volunteered freely, but most customers respond better when a quiz or survey leads to a visible, immediate benefit, a personalized recommendation, a relevant discount, content tailored to what they just shared. Asking for too much upfront, before any value has been demonstrated, tends to produce low completion rates regardless of how good the eventual personalization payoff would be.
Why This Matters More as Third-Party Data Fades
Zero-party data has grown in importance specifically because it doesn’t depend on cookies, tracking scripts, or any of the third-party infrastructure that’s become increasingly restricted by both privacy regulation and browser policy. Data a customer explicitly hands over remains available and reliable regardless of what happens to third-party tracking elsewhere, which is a large part of why it’s treated as an increasingly central strategy rather than a nice-to-have addition.
Related terms:
Adflipr’s forms and preference centers can capture zero-party data directly from subscribers, feeding that stated preference data into segmentation and personalization alongside behavioral signals already synced from a store.
