[GTM glossary](/glossary.txt) Second-party data

Data & Enrichment

# Second-party data

In short

Second-party data is first-party data collected by one organization and shared directly with another through a partnership or agreement. The sharing company gathered it from its own customers, users, or audience, and the receiving company gets it with clear knowledge of where it came from.

The difference from third-party data is the source. Third-party data is aggregated by a vendor from many places and sold broadly. Second-party data comes from one named partner, so provenance and context are clearer.

## Where second-party data comes from

* **Data partnerships:** Two companies with complementary audiences exchange or license audience or behavioral data.
* **Co-marketing:** Webinar or event partners share registrant lists, where consent allows it.
* **Technology partners:** A software partner shares usage or installation data about mutual customers.
* **Data clean rooms:** Both sides match audiences in a controlled environment without exchanging raw records.

---

## First-, second-, and third-party data

* **First-party:** Data you collect yourself from your own site, product, and CRM.
* **Second-party:** Someone else's first-party data, shared directly with you.
* **Third-party:** Data compiled by an aggregator from many sources and sold to many buyers.

---

## Why GTM teams use it

Say a project management tool partners with a time-tracking app. The partner shares a list of companies that use its product and opted in to hear about integrations. The project tool can now reach a warm, relevant audience that its own data would never reveal.

* **Reach:** Access audiences beyond your own database.
* **Relevance:** Partner data reflects real behavior with a known product.
* **Trust:** You know who collected the data and how.

---

## Risks and mistakes

* **Weak consent:** Confirm the partner collected the data with permission that covers sharing. Involve legal review; this is general information, not legal advice.
* **No written terms:** Agree on allowed uses, retention, and who owns derived data.
* **Small scale:** One partner covers a narrow audience, so it rarely replaces broad data sources.
* **Skipping validation:** Check accuracy and freshness before loading it into your CRM.

---

## Second-party data FAQs

**What is second-party data?**

Second-party data is another organization's first-party data that it shares with you directly through a partnership. Because it comes from one known source that collected it from its own audience, you can understand where it came from and how it was gathered.

**What is the difference between second-party and third-party data?**

Second-party data comes straight from one partner that collected it first-hand. Third-party data is compiled by an aggregator from many sources and sold to many buyers. Second-party data is narrower but has clearer provenance and context.

**What are examples of second-party data?**

Examples include a partner sharing opted-in webinar registrants, a software partner sharing which mutual customers use an integration, or two companies matching audiences in a data clean room. In each case the data is shared directly between known parties.

**Is second-party data compliant with privacy laws?**

It can be, but only if the original data was collected with a valid legal basis that covers sharing, and the agreement sets clear terms. Requirements vary by region. This is general information, not legal advice, so check with counsel.

Share term

---

## More related phrases

* [Data management platform](/glossary/data-management-platform.txt)
* [Buyer intent data](/glossary/buyer-intent-data.txt)
* [First-party intent](/glossary/first-party-intent.txt)

## Similar phrases

* [First-party data](/glossary/first-party-data.txt)  
First-party data is information a company collects directly from its own customers, prospects, and channels, such as CRM records, product usage, and website behavior.
* [Third-party data](/glossary/third-party-data.txt)  
Third-party data is information collected by an outside organization and sold or licensed to others, such as company lists, contact details, and intent signals used to find and prioritize prospects.
* [Zero-party data](/glossary/zero-party-data.txt)  
Zero-party data is information a person intentionally and proactively shares with a company, such as preferences, goals, or purchase intent, usually through forms, quizzes, and surveys.
* [B2B data enrichment](/glossary/b2b-data-enrichment.txt)  
B2B data enrichment automatically fills and updates company and contact records with missing fields, so sales and marketing can target, score, and reach the right buyers.
* [Data privacy](/glossary/data-privacy.txt)  
Data privacy is the set of rules and practices that govern how personal information is collected, used, stored, and shared, so people keep control over their data.