In this guide
- First-party data is information you collect yourself, with the person's knowledge: purchases, sign-ups, form entries and on-site behaviour.
- It is more reliable than third-party data, because you know where it came from and the person gave it to you.
- To be useful it must be consented, clean, stored safely and connected to your ad platforms.
"First-party data" is the phrase on every marketing slide since third-party cookies began to fade. It is simple at the core: it is what you learn from people who deal with you directly. This page explains the main kinds, how to collect them properly, and how to put them to work. It sits next to cookieless tracking, third-party cookies and customer data collection.
The four kinds
| Kind | Examples | How you get it |
|---|---|---|
| Declared data | Name, e-mail, phone, birthday, preferences | Forms, checkout, accounts, surveys |
| Behavioural data | Pages viewed, products added to cart, searches | Your analytics and tracking |
| Transactional data | Orders, value, refunds, subscriptions | Your shop and payment system |
| Interaction data | E-mail opens, support chats, calls | Your e-mail tool, helpdesk and CRM |
Check your tracking in one pass
This is an example. Run the check on your own site to see where yours stands.
What makes it valuable
- You know the source. There is no doubt about where it came from.
- It is about your own customers. It describes people who actually engage with you.
- Ad platforms can use it. Customer lists and server events let platforms find similar people and measure conversions.
- It lasts. It does not depend on a browser setting.
Collect it properly
Say why
Tell people what you collect and why, in plain words.
Ask for consent where needed
Advertising use of e-mail and phone usually needs it in the EU and UK.
Collect only what you use
Each extra field is more to protect and explain.
Keep it clean
Validate e-mail and phone formats at the form.
Store it safely
Limit access and set a retention period.
Respect withdrawal
When someone asks to be removed, remove them everywhere, including audience lists.
Raw events in. Clean events out.
Open Tracked collects each event on your own domain, removes the noise and sends what is left to Meta, Google Ads, TikTok.
Put it to work
01Server-side events
Send purchases and leads from your server with hashed e-mail and phone. See Conversions APIs explained.
Audience lists
Upload customer lists to Google Ads, Meta and TikTok. See customer lists in Google Ads.
Returning-visitor memory
Open Tracked's Data Store and Enricher keep hashed identifiers for the days you choose, up to 400, and add them to later events.
Your own analytics
First-party analytics shows revenue and spend without relying on a third party's numbers.
What first-party data is not
- It is not a licence to ignore consent.
- It is not automatically accurate. People mistype and use fake e-mail addresses.
- It is not useful if it stays in one tool. Connect it to the places you use it.
A worked example
A store asks for an e-mail address at checkout and offers a discount in return for joining the newsletter. Every month it gets a few thousand new addresses, with clear consent. It hashes them and uploads the list of customers to Meta and Google, uses the list to exclude existing buyers from acquisition campaigns, and to build similar audiences from the best customers. It also stores the hashed e-mail on its tagging server, so a returning visitor's page views reach the ad platforms with the match data. After a quarter, the acquisition cost for new customers is lower, because the ads no longer waste money on people who have already bought, and the platforms learn faster from a clean list of real customers.
None of that needed a data science team. It needed consent at the form, a clean list and a routine to refresh it. First-party data is mostly a matter of habit and care.
Works with your stack
Grab a logo and throw it. These are the tools Open Tracked already talks to.
Frequently asked questions
What is first-party data?
Information you collect directly from your own visitors and customers, such as orders, sign-ups and on-site behaviour.
Is first-party data exempt from consent rules?
No. Privacy laws still apply to personal data you collect yourself.
How do I use first-party data in ads?
Upload hashed customer lists and send server-side events with hashed e-mail and phone.
Why is it more valuable than third-party data?
You know where it came from and it describes people who deal with you.
Where should I store it?
In your shop, CRM or a data store with controlled access, and for tracking in a protected store such as the Open Tracked Data Store.
Do I need spreadsheets to read my results?
No. Once tracking is live, the Open Tracked analytics shows spend, revenue, ROAS and profit, and you can ask Ari, the built-in AI assistant, questions about your own numbers in plain words. Ari's allowance depends on your analytics plan.
Is Open Tracked different from Open Track or Open Space Track?
No. Open Tracked is the official name of our server-side tracking platform, and the website is opentracked.io. Many people search for it as Open Track, OpenTrack or Open Space Track. All of them lead to the same product: server-side Google Tag Manager hosting, first-party analytics and a CRM pipeline.
Fix your tracking at the source
Open Tracked hosts your server-side Tag Manager, keeps first-party cookies alive and shows what each ad is really worth.
The Open Tracked team
We build Open Tracked: server-side tracking hosting, analytics and the tools around them, for stores that spend on ads. Questions about this guide, or an idea for the next one?
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