First-Party Data

Analytics

Also: 1P Data · Owned Data

What it isData you collect directly from your own customers and visitors

ExamplesEmail lists, purchase history, site behaviour, CRM records

Why nowThird-party cookies are being phased out

AdvantageYou own it. No one can take it away.

Quick definition

First-party data is information you collect directly from people who interact with your business: customers, subscribers, site visitors and app users. It includes email addresses, purchase history, browsing behaviour, CRM records and any data that someone gave you directly, with consent.

How it varies across Australia

Businesses with strong first-party data assets are better positioned for the shift away from third-party cookie-based targeting. Australian businesses in retail, financial services and subscription categories tend to have the richest first-party data by volume. Most Australian small businesses have significant first-party data assets they are not using effectively, particularly CRM records and email subscriber lists.

See data and tracking performance across Australian industries →

Data types by party

First-party data(1P)

Collected directly by you from your own customers and visitors, with their consent.

Highest quality, lowest risk, fully owned

Second-party data(2P)

Another company's first-party data shared directly with you, usually through a partnership.

High quality but requires a specific commercial relationship

Third-party data(3P)

Data collected by a third party and sold to marketers. Cookies, audience segments, data brokers.

Lower quality, diminishing availability as cookies phase out

What it actually means

First-party data is the information you collect directly from the people who engage with your business. When someone buys from your online store, subscribes to your email list, fills in a form on your website or uses your app, they generate first-party data: their name, email, purchase history, preferences and behavioural patterns on your own properties.

The reason first-party data is receiving renewed attention is the deprecation of third-party cookies. Third-party cookies were the mechanism that allowed advertisers to track users across the web and build audience profiles without a direct relationship with those users. As browsers phase out third-party cookies and privacy regulations tighten, the ability to target audiences based on their behaviour on other companies' websites is declining. Businesses that built their marketing on third-party data now need an alternative.

First-party data is that alternative. Because it comes from a direct relationship, it is higher quality, more accurate and legally cleaner than third-party data. The trade-off is that building a first-party data asset requires effort, systems and, critically, something worth trading for: a reason compelling enough that people will give you their information and consent.

The most common first-party data assets are email lists, CRM customer records, product analytics from logged-in users and loyalty programme data. All of these can be used for personalisation, targeting via custom audience uploads to ad platforms and modelling to find new customers who look like existing ones.

First-party data is the only marketing asset that gets more valuable as privacy regulations tighten.

How it shows up

First-party data shows up across multiple systems: your email platform (subscriber list), your CRM (customer and lead records), your analytics platform (logged-in user behaviour), your product database (purchase history and usage data) and your ad platforms (custom audience uploads and customer match lists).

The diagnostic question: how much of your targeting and personalisation capability relies on data you collected yourself versus data that a third party sold you or inferred from cookies? Businesses with a strong first-party data foundation can answer that question with confidence.

The Australian context

Australian privacy law is governed by the Privacy Act 1988 and the Australian Privacy Principles (APPs). Collecting, storing and using first-party data in Australia requires consent, a privacy policy that explains how data is used and processes for responding to access and deletion requests.

The Australian Consumer Data Right (CDR) is also expanding the concept of data portability, giving consumers rights to access and transfer their own data held by organisations in certain sectors. Businesses operating in banking, energy and telecommunications are already subject to CDR obligations. Other sectors are expected to follow.

The Spam Act 2003 governs how first-party data like email addresses can be used for commercial communications. Consent requirements and unsubscribe obligations apply regardless of how the data was collected.

Where people get this wrong

Collecting first-party data without a clear plan for how to use it.A large email list that receives no personalised communication is a wasted asset. Data collection should be connected to a specific activation strategy: segmentation, personalisation, custom audiences or lookalike modelling.

Treating consent as a checkbox rather than a relationship.Consent gives you permission to communicate. It does not guarantee engagement. If the content you send is not useful, subscribers will disengage or unsubscribe, eroding the value of the data asset over time.

Not cleaning and deduplicating the data regularly.First-party data degrades over time. Email addresses become invalid, customer details change and records accumulate duplicates. A data asset that has not been maintained is less useful and more likely to cause deliverability problems.

Common questions

Why is first-party data more valuable than third-party data?

First-party data comes from a direct relationship with someone who chose to engage with your business. It is more accurate, more current and more legally sound. Third-party data is inferred from behaviour across other websites and assembled by brokers who had no direct relationship with the person. The quality is lower, the accuracy is harder to verify and privacy regulations are progressively restricting its use.

What is happening to third-party cookies?

Third-party cookies are being phased out across major browsers. Safari and Firefox have blocked them for years. Google has been gradually restricting them in Chrome and has introduced Privacy Sandbox as an alternative tracking framework. The timeline has shifted multiple times, but the direction is clear: third-party cookie-based targeting will become less reliable and eventually unavailable.

How do I build a first-party data strategy?

Start with what you collect and why. Audit every touchpoint where you gather customer information. Then ask what you do with it. A strategy connects collection to activation: what data, from whom, used for what purpose. The most effective first-party data strategies are built on a value exchange: you offer something useful enough that people willingly share their information.

Can I use my first-party data for advertising?

Yes. Most major ad platforms allow you to upload customer lists and use them to target existing customers, create lookalike audiences and exclude existing customers from acquisition campaigns. This is called customer match or custom audiences. It requires that your data was collected with consent and that the platform's terms of service are met.

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About New Rebellion

New Rebellion is a marketing intelligence consultancy. We build tools, score Australian businesses on how their marketing actually performs, and publish Debrief every day. This dictionary is part of how we work in the open.

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