What is first-party data?
First-party data (also known as “first party data”, “1st party data” or “1P data”) refers to information an organization collects directly from its audience. This includes customers, social media followers, subscribers, or site visitors – anyone who has interacted or transacted directly with the company.
There’s no intermediary between the company collecting the data (the first party) and the people from whom it’s collected.
Definitions: |
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Zero-party (0P) data: Data intentionally and proactively shared with an organization by a customer such as a poll or a survey (often in return for discounts or other benefits). |
First-party (1P) data: Data collected directly by a company about its own customers’ interactions and transactions on its platforms and services. |
Second-party (2P) data: Data that is ethically and legally shared between two companies, often under a partnership agreement, for their mutual benefit. |
Third-party (3P) data: Data about people ethically sourced from data brokers, advertisers, or other external third parties who have no direct relationship with the people. |
- See also:
- What is second-party data? (AKA second party data, 2nd party data, or 2P data)

First-party data examples
Any audience or customer interaction across an organization’s platforms and services can generate first-party data. Typical examples can include:
- Audience actions and behaviors (actions taken on a website, app, platform, or product set).
- Basic contact data (such as name, address, phone number or email address).
- CRM data (which can include any of the other items on this list as well as information like customer feedback or live chat transcripts).
- Customer purchase history (what, where, when, at what price, in what style, and so on).
- Demographic information (such as age, gender, race, income, or marital status).
- Social media interactions (audience comments and conversations).
- Subscription-based interactions or product info (services or items that customers request, and often pay for, on a regular basis. Examples include access to gated online content, email newsletters, and subscription-based products.)

The advantages of using first-party data
For organizations looking to deliver outstanding personalized and privacy-conscious customer experiences, there are several practical and strategic advantages to using first-party data. The most significant of these include:
- Strengthen brand loyalty by meeting expectations
Personalized experiences have caused customer expectations to rise dramatically. This means brands must prioritize and sharpen their first-party data strategy to deliver the personalized experiences customers now expect. By leveraging accurate, consented first-party data, companies can continue to build brand loyalty through superior personalization. - First-party data is more accurate and reliable
As first-party data is collected directly from organizations’ own customer interactions and sources it is more accurate and reliable than second-party data or third-party data. It carries a far lower risk of dilution, distortion, or outright inaccuracy than other data types. - Deeper customer insights
First-party data enables far greater depth of customer understanding since organizations can tie data directly to customer identities and connect insights across channels to build a complete picture. With customer segmentation it also enables brands to engage more broadly with customers without diluting accuracy of understanding. - Find new high-value customers
Analysis of first-party data can identify the characteristics common to customers with high lifetime value. AI analytics are particularly powerful in this area. These insights can then be used to shape marketing activity that will resonate with lookalike audiences, which share these same traits. - Privacy compliance and ethics
When it is collected with customers’ knowledge and consent, first-party data is compliant with the many privacy laws and regulations in place around the world. Using 1P data minimizes many of the personal data consent issues and privacy concerns that can be associated with acquiring third-party data. - Ownership and control
With first-party data, full control is retained over the collection, management, analysis, enrichment, and activation of audience data. - Build trust
With first-party data as the cornerstone of marketing strategies and campaigns, an organization effectively pursues a consent-driven marketing model that builds trust and loyalty among existing customers. - Improved products and services
Regular analysis of first-party data such as direct customer feedback, buyer behaviors, and on-platform preferences enables brands to enhance their product or service set, and how it is pitched.
Deterministic and probabilistic first-party data
Each of the first-party data examples above can be divided into one of two important data groups. First, there’s deterministic first-party data (what is known for a fact about a customer). Then there’s probabilistic 1P data (what can be inferred about them based on their behaviors).
Here is a little more detail about each group:
- Deterministic first-party data: This is concrete, factual information an organization knows about the customer and the customer journey. Examples include data the customer submitted, such as name or contact information, but also product purchase history, content downloads, or any direct engagement with the organization’s platforms. It’s solid audience intelligence, with zero guesswork.
- Probabilistic first-party data: This is predictive data based on factual audience information. Organizations draw reasoned, logical inferences about customers’ probable preferences and future behaviors by analyzing historical engagements or contextual data points such as a user’s preferred device type, page view frequency, page dwell time, or even IP address.
Why this first-party data knowledge is important for successful campaigns
Successful marketing strategies will combine the unambiguous insights of deterministic first-party data with the scalability and personalization benefits of probabilistic first-party data.
Marketers can extend campaign reach by engaging customers about products or services they predict will be of interest based on analysis of historical behaviors – customers who like product A also tend to like product B. Similarly, combined analysis of an individual’s onsite behavior or purchase history with customer journey stage device preference (such as mobile) can create personalized experiences, with tailored recommendations, content, and format.
AI amplifies personalization potential
A brand’s ability to deliver personalization with first-party data has received a massive boost from the broad availability of generative artificial intelligence (AI). By applying machine learning (ML) and predictive analytics to customer data, company data, and industry data, organizations can provide self-optimizing customer journeys, tailored to individual preferences.
- Find out more about predictive personalization and proactive customer service.

Activating, orchestrating, and enhancing first-party data
First-party data is the core and cornerstone of successful audience engagement. But to maximize its impact, to strengthen that customer connection, to optimize individualization means brands are making first-party data work harder for them.
DID YOU KNOW
66% of consumers are more likely to buy from a brand that treats them as an individual

– Acxiom’s first annual customer intelligence survey
First-party data needs to be elevated, activated, and enriched within a broader unified data strategy – drawing in data points from across the organization to deliver more tailored experiences across all channels.
This can be a challenge, but the effort yields great results. Our research has shown that 66% of people are more likely to buy from a brand that treats them as an individual.
Popular first-party data services include:
- Customer data platforms (CDPs):
CDPs enable organizations to de-silo, consolidate, and manage first-party data from across the martech stack and offline sources to orchestrate activations across all channels. The 360-degree customer view CDPs provide helps ensure personalized audience engagements.- Not sure how to select a CDP partner? Use our CDP buyers’ guide.
- See how Acxiom amplified the impact of Golf Digest’s first-party data
- Data clean rooms (DCRs): DCRs offer a secure environment where organizations can ethically share aggregated and anonymized customer information, excluding sensitive personally identifiable information (PII), to augment customer insights for increased personalization or expand their reach.
- Third-party data enrichment: The more an organization understands its audience, the better it can serve them. This means pulling in information from a broad range of sources to fill in any blanks in first-party data. It is critical that this data is ethically sourced from trusted partners who should deliver a broad spectrum of predictive, attitudinal, behavioral, and transactional insights.
- Discover Acxiom’s data enrichment services, offering more than 12,000 global data attributes specifically focused on providing personalized experiences – including InfoBase®, Personicx®, and Audience Propensities®.
- Enterprise identity solutions: Every step toward augmenting the impact of first-party data needs to be backed up by an identity solution. Identity resolution enables brands to check, match, distinguish, validate, and append customer engagement data points into more comprehensive, accurate records.
It ensures, for example, that the ‘D Smith’ browsing a brand’s online store is the same ‘Dana Smith’ who responded to a social media poll. Identity solutions safeguard customer engagements from inaccurate personalization.
Learn more about the award-winning Acxiom Real Identity™ or its cloud-native counterpart Real ID™ enterprise identity solutions.

First-party data privacy, security and compliance
In privacy regulation terms, first-party data offers a stronger, simpler foundation for marketing strategies. However, there are still legal frameworks and best practices to consider.
Be up front, be open, be honest
To ensure compliance with first-party data regulations, a business should prioritize transparency and obtain user consent in line with data protection laws (see sidebar for details). Communicate clearly with audiences about when their data is collected and how it will be used and, again, if possible obtain their permission for its processing. Privacy policies and notices should be transparent and straightforward.
Avoid first-party data mission creep
Use of legitimately collected first-party data should align with stated purposes and, vitally, audience expectations. If a person signs up to receive news or offers about a specific product or service, that should be the focus of initial engagements – it’s not an opportunity to deluge the person with inventory-wide offers.
Defined structures and processes
Data privacy compliance is not a one-and-done activity. It requires constant monitoring and reviews, defined processes, and dedicated resources. In this way, customer rights inquiries (like data access or deletion requests) can be handled promptly. Structures should be in place to train the personnel involved and to review data privacy practices and compliance protocols.
Securing first-party data
First-party data is a valuable commodity, and organizations are obliged to secure it accordingly. This includes carefully implemented and strictly monitored access controls, sharing protocols, infrastructure security, and information encryption. Data should be consolidated from all customer journey touchpoints – ideally into a single platform or unified data layer.
There should be a clear rationale for the customer information that is retained – only data that is necessary should be kept. Importantly, procedures for securing first-party data should be reviewed regularly to ensure ongoing compliance with shifting regulatory requirements.
The data privacy landscape
The landscape for data privacy regulations is a complex patchwork. Depending on location and trading areas a business can face multiple, overlapping privacy laws based on which to structure its marketing data strategy. Take a look:
In the U.S. there is no single data privacy framework. The closest thing to it is the California Consumer Privacy Act (CCPA). At last count 13 more states had enacted similar laws.
For now, rather than an overarching legislative umbrella, the U.S. adopts more of a sector focus to data privacy. For example, personal medical data is protected by the Health Insurance Portability and Accountability Act (HIPAA), financial data by the Gramm-Leach-Bliley Act (GLBA), and education information by the Family Educational Rights and Privacy Act (FERPA).
However, the landscape may be set to shift again. Draft bipartisan legislation proposing the creation of an American Privacy Rights Act (APRA) is gaining support in both Congress and the Senate. APRA would create a comprehensive nationally-applicable privacy law, which the U.S. Senate Committee on Commerce, Science, and Transportation says “… eliminates the existing patchwork of state comprehensive data privacy laws and establishes robust enforcement mechanisms to hold violators accountable, including a private right of action for individuals.”
First-party data strategy for much of Europe is covered by the General Data Protection Regulation (GDPR).
In China there’s a three-pronged approach to data security, with personal information safeguarded by the Personal Information Protection Law (PIPL), the Cybersecurity Law (CSL), and the Data Security Law (DSL).
The point is, that many (most) countries have some type of data privacy protections. Getting expert advice on compliance with these regulations is a sensible approach. That said, organizations that adopt a first-party data-centric approach, with an emphasis on transparency and gaining consent, place themselves in a strong position.
Best practices for first-party data acquisition
When it comes to first-party data acquisition best practices, privacy-conscious businesses should focus on direct collection from users. This might include methods such as web forms, user registrations, surveys, lead generation forms, email nurture campaigns, polls, or subscription sign-ups – each one of which carries explicit consent from the individual.
Other legitimate, if less explicitly consensual, means of acquiring first-part data include collection of information post-purchase, or via website or social tags or pixels (first-party cookies effectively) monitoring on platform behaviors.
Best practices here include the collection of only useful, usable information and provision of clear notice or opt-in procedures when collecting any first-party data. Organizations should also document and review all first-party data acquisition methodologies.
First party data FAQs
First-party data is information gathered directly from website visitors or customers. It can include name, email address, previous purchases, and more. Marketers can then use these details to inform a variety of valuable use cases, such as campaign optimizations or when reviewing traffic analytics. For example, a marketer can create personalized content that increases the likelihood of conversion on your site.
First-party data provides insights into what customers are looking for; increased loyalty due to better personalization; and higher conversions because you’re giving them exactly what they want instead of generic content.
There are two major types of first-party data you can use in your campaigns — deterministic and probabilistic. Deterministic data includes personally identifiable information (PII) such as first name, email address, purchase history (online and offline), or a customer’s user ID. These identifiers directly associate to a person. Probabilistic data types include less direct relationships to a person and have a scrambled or “hashed” IP address, ad server match IDs, hashed email, first-party cookie IDs, or Acxiom’s Analytic ID.
The deterministic PII data IDs give the most accurate representation of a person’s interests because it’s more detailed than just a user’s location or web browsing habits. Probabilistic website visitor IDs help identify which posts users have read and provide insights into what content resonates with them the most so you know where to focus your efforts. What type should you include? That depends on what kind of project you’re running: one type is more appropriate for a first-time customer, while the other is used to reach those who have already interacted with your brand. However, when it comes to building a complete picture of your customer base, it is almost always best to have a good mix of deterministic and probabilistic data. After all, it is your data!
First-party data should be used along with external sources, such as customer feedback surveys and CRM tools. This practice enables you to receive first hand insights into what customers think about your company and how they’re interacting with it regularly, which is precisely the kind of information first-party data provides. With more accurate customer portraits, marketing teams can develop better strategies for future campaigns using first hand knowledge based on real-life interactions.
First-party data can be collected through email, social media (posts and interactions), by using online forms on your website, and by deploying first-party tags. There are five scenarios when collecting first-party data: 1) collecting it after a purchase has been made; 2) when someone responds to an invitation for the first time or signs up for something like a newsletter; 3) as they’re scrolling through your site looking at products/services that interest them; 4) from information submitted via a registration form on your webpage(s); and 5) what’s shared with other people about their experience using specific services or buying certain items.
The best way to collect probabilistic first-party data is by using first-party tags. These collect behaviors from users who may be anonymous because they’re not identified through PII identifiers such as first name or email address. This type of data can be collected when a user visits your website for the first time or buys certain items from you but does not provide any other identifying information. The tags also leverage first-party cookie IDs, which can store preferences associated with people without revealing their identity (such as IP addresses). Cookies are a tried-and-true web technology, used since 1993! These first-party cookies use the same technology as third-party cookie IDs by identifying visitors anonymously based on which pages they visit. However, first-party cookies are owned by the brand, so any data collected is 100% yours. It is never sold or shared with other companies or users without your consent. For these reasons, while third-party cookies are going away, first-party cookies are here to stay.