---
title: "What Is Third-Party Data? Definition for B2B | ONEGTMLAB"
description: "Third-party data is information collected by outside providers and sold or licensed to companies. Learn how B2B teams use it and what to check."
canonical: https://www.onegtmlab.dev/glossary/third-party-data
---

# What Is Third-Party Data? Definition for B2B | ONEGTMLAB

[](/)

[

Book a call

](/book)

GTM Glossary

# Third-Party Data

Third-party data is information about people or companies that is collected by an outside provider from many sources, then sold or licensed to businesses that did not collect it themselves.

Also called: 3rd party data

## Why it matters

Third-party data lets a company learn about accounts and buyers it has never interacted with. B2B teams use it for firmographics, technographics, contact details, intent topics and company news, which feed list building, ICP scoring and targeting before any first-party relationship exists.

Because the data is gathered at scale from many sources, accuracy and freshness vary between providers and between records. Teams check coverage and accuracy on a sample before buying, and verify contact details before using them.

## Example

A company buys access to a provider's database of company headcount and technology data. It filters for companies that use a particular accounting system and have grown their finance team in the past year, verifies the emails of the finance leaders at those companies, and builds its outbound list from them.

## Related terms

-   [First-Party Data](/glossary/first-party-data)
-   [Intent Data](/glossary/intent-data)
-   [Firmographics](/glossary/firmographics)
-   [Technographics](/glossary/technographics)
-   [Data Enrichment](/glossary/data-enrichment)

## Related service

[RevOps Clean CRM data, lead routing and reporting your team can trust.](/services/revops)

## Related playbooks

-   [Data Enrichment Playbook Reuse what you hold, enrich the company first, judge from the description, and keep every raw payload.](/growth-playbooks/data-enrichment)
-   [Intent Data Playbook Score fit and timing separately, act on stacked signals, and read every signal by meaning.](/growth-playbooks/intent-data)

## Questions people ask

### What is considered 3rd party data?

Data collected by an organization that has no direct relationship with the people or companies it describes, then sold or licensed to others. In B2B that includes purchased contact databases, firmographic and technographic data, and intent data gathered across many websites.

[← All GTM terms, A to Z](/glossary)

GET STARTED

## Turn the definition into a working system.

We build the RevOps systems behind terms like this one. Tell us where your pipeline breaks and we will show you what we would fix first.

[

Book a Strategy Call

](/book)[

See Case Studies

](/case-studies)

[](/)

© 2026 ONEGTMLAB Private Limited. All rights reserved.

COMPANY

[

Why Us

](/#why-us)[

Process

](/#timeline)[

Blogs

](/blogs)[

About

](/about)[

Clients

](/clients)[

Free resources

](/free-resources)[

Newsletter

](/newsletter)

Services

[

GTM Engineering

](/ai-gtm-engineering)[

Account-Based Marketing

](/services/account-based-marketing)[

Paid Media

](/services/paid-media)[

Content Engineering

](/linkedin-personal-branding)[

RevOps

](/services/revops)[

SEO, AEO & GEO

](/services/seo-aeo-geo)[

All services

](/services)

![](/_astro/wordmark-3d.CMEfGdYr.svg)