Table of contents
- What Is First-Party Data?
- First-Party vs Second-Party vs Third-Party Data
- Why First-Party Data Matters for Growth Marketers
- Challenges of Using First-Party Data
- Key Trends and Statistics
- What This Means for Growth Marketers
- Building Your First-Party Data Strategy
- Conclusion
- About Growth Method
- Frequently asked questions
What Is First-Party Data?
First-party data is information you collect directly from your customers or users through your own channels. This includes data from your website, apps, CRM systems, email marketing, surveys, and customer support interactions. Unlike third-party data, first-party data is owned entirely by your business, giving you complete control over its accuracy, privacy, and usage. For a deeper understanding of related concepts, see our complete guide to zero-party data.
First-Party vs Second-Party vs Third-Party Data
Understanding the differences between first-party, second-party, and third-party data is essential for building an effective growth marketing strategy. Here’s a quick overview:
| Data Type | Description | Examples |
|---|---|---|
| First-party data | Data you collect directly from your own audience. | Website analytics, CRM data, purchase history, email interactions, customer surveys. |
| Second-party data | Data collected by another company and shared directly with you through partnerships. | An airline sharing customer data with a hotel chain. |
| Third-party data | Data aggregated and sold by external providers with no direct relationship to your customers. | Demographic data, behavioural insights, intent data purchased from data brokers. |
Why First-Party Data Matters for Growth Marketers
First-party data offers several key advantages for growth marketers:
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Accuracy: Data collected directly from your audience is more reliable and relevant.
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Personalisation: Enables targeted marketing campaigns, improving customer experience and conversion rates.
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Cost Efficiency: Reduces reliance on expensive third-party data providers, lowering marketing costs.
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Compliance: Easier to manage privacy regulations like GDPR and CCPA, as you control data collection and usage.
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Competitive Edge: Provides unique insights into customer behaviour that competitors can’t access.
Challenges of Using First-Party Data
While first-party data is valuable, it also presents some challenges:
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Limited Scale: Restricted to your own audience size, potentially limiting reach compared to third-party data.
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Data Management: Requires robust infrastructure and processes to collect, store, and analyse effectively.
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Resource Intensive: Collecting and managing first-party data can require significant investment in technology and expertise.
Key Trends and Statistics
Recent changes in privacy regulations and browser policies have accelerated the shift towards first-party data:
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A Deloitte survey found that 61% of high-growth brands are prioritising first-party data strategies.
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Google reversed course in April 2025 and continues to support third-party cookies in Chrome via its existing Privacy Sandbox controls rather than a hard deprecation, but the years of uncertainty already pushed many marketers to prioritise first-party data as the more durable foundation.
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Boston Consulting Group research shows companies effectively using first-party data achieve up to 2.9 times higher revenue growth compared to those relying on third-party data.
What This Means for Growth Marketers
The shift towards first-party data presents both challenges and opportunities. Growth marketers must now:
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Invest in effective data collection and analytics tools.
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Develop clear strategies for data privacy compliance and transparency.
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Prioritise building direct customer relationships through personalised experiences and targeted campaigns.
Building Your First-Party Data Strategy
To effectively leverage first-party data, growth marketers should:
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Clearly define data collection goals and identify key data points relevant to your business objectives.
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Implement robust data collection tools and processes, ensuring compliance with privacy regulations.
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Regularly analyse and segment your data to uncover actionable insights and opportunities for personalisation.
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Continuously test and optimise your marketing strategies based on first-party data insights.
Conclusion
First-party data is increasingly critical for growth marketers aiming to deliver personalised experiences, improve marketing efficiency, and drive sustainable growth. Investing in a robust first-party data strategy helps you stay ahead of industry trends, comply with evolving privacy regulations, and consistently demonstrate marketing ROI.
About Growth Method
Growth Method is the agentic marketing platform for B2B teams. A first-party data strategy only pays off if you act on what it tells you, and that’s the plan, launch, analyse, repeat loop we build the product around: agents read your own first-party signals, such as site behaviour, CRM records and product usage, alongside your growth goal, draft a campaign as a testable hypothesis instead of a rerun of last quarter’s playbook, launch it with the before-metrics already recorded, and analyse what actually moved once the results are in.
We are on-track to deliver a 43% increase in inbound leads this year. There is no doubt the adoption of Growth Method is the primary driver behind these results.
Laura Perrott, Colt Technology Services
Get started to turn your first-party data into a measured campaign of your own.
Frequently asked questions
What is a first-party data strategy?
A first-party data strategy is a deliberate plan for collecting, storing and activating the data your business gathers directly from its own customers and users, through your website, product, CRM, email and support channels, rather than relying on data bought or licensed from third parties. It typically defines what to collect, the infrastructure to manage it, how to stay compliant with privacy regulation, and how the data feeds personalisation, segmentation and measurement.
How is first-party data different from zero-party and third-party data?
First-party data includes everything you observe about a customer, such as page views and purchase history, alongside anything they tell you directly. Zero-party data is the subset a customer shares proactively and intentionally, like a stated preference or survey answer. Third-party data is aggregated and sold by external providers with no direct relationship to your customers. See our guides to zero-party data and third-party data for the full comparison.
What tools do I need to build a first-party data strategy?
Most teams need a way to capture data at source (website analytics, CRM, product events), somewhere to unify it such as a marketing data warehouse or CDP like Segment, and a process for turning it into segments and campaigns rather than letting it sit unused. Segment itself has no official MCP server yet, but several third-party options let an AI agent read and act on its sources, destinations and tracking plans. The right stack depends on your scale, but the sequence of capture, unify, activate holds regardless of tool choice.
Is Google still phasing out third-party cookies?
No. Google reversed its plan to deprecate third-party cookies in Chrome in April 2025 and continues to support them via existing privacy controls rather than a hard cut-off. That reversal doesn’t change the underlying case for first-party data, which remains the more durable, higher-quality foundation regardless of what happens to third-party cookies.