Customer Data Platform Lite
Audience Builder
Custom audiences for
the modern advertiser
We create high performing custom audiences for paid advertising that are bigger, refresh more often and can be shared with your extended team without risking any personal data exposure.
Start using your data as a competitive advantage seamlessly and securely.







Transform your
paid media with better data
We specialise in maximising the performance of your data for paid media and are dedicated to this. Our audiences are:
- 75% bigger (on average)
- Match off email and phone number
- Refresh daily
Allowing your advertising to get the performance boost it deserves.
How it works
1. Connect Your Data
Connect to your analytics data in seconds to unlock all data you already have and place a tag on site to synchronise customer data and consent management.
2. Create Your Audiences
Create audiences in seconds based on the behaviours and shopping habits you have recorded.
3. Export with One Click
Export to your advertising platform of choice with a single click and it will refresh each day automatically.

Hurdle free implementation
Connect to your website without needing developers
Thirty-One Circles is compatible with all back-end infrastructure and can be implemented as easily as an advertising pixel.
With single-click connections to your major channels, get up and running in minutes.
Extend your possibilities
With our bespoke extension, audiences reach beyond the platform:
- Use the Audience Builder as a data clean room
- Connect to your offline or siloed data
- Deploy complex audience definitions

Key Benefits
Performance boosts
75% Bigger Audiences
Our platform builds audiences based off the customer's website cookie consent rather than CRM opt-in. This results in an average of 75% more opt-in customers than traditional approaches, while being more GDPR compliant. Meaning bigger audiences and better results.
Leverage the Recency Effect
Our platform synchronizes your audiences daily, so that you can capitalise while your audience is fresh and the response rate is likely to be at its highest.
Better Match Rates
We export audiences based off multiple identifiers rather than just hashed emails. This advanced approach allows for enhanced match rates and more audience scale in platform.
Unlocking insights
Lifetime Value
Create and analyse audiences based off lifetime value. Understand more of the true picture with our Lifetime Value Trend and see if an audience is increasing or decreasing in lifetime value
Audience Overlap
Being aware of the overlap in audiences is crucial to making the right marketing choices so that a user is not over or under exposed to your ads. Do this in seconds in our platform and make better strategic decisions.
Audience Comparison
Compare and contrast the differences between your audience segments with ease, so that you can understand what is most important to each, and tailor your advertising accordingly.
Improving the status quo
Unlock your existing data
We connect and extend the power of your existing data, so there are no cold starts, no learning periods, no silos, just advertising potential in your hands.
Improve your compliance
We track your website opt-ins in real time and update your audiences automatically to reflect this. Ensuring you are always using compliant data. Our advanced user permissions allow you to restrict personal data exports while empowering audience usage to more of the team.
Frequently Asked Questions
You can get started in minutes by connecting our platform to your existing data with just a few clicks.
To keep audiences up to date there is a small code snippet that needs to be placed on your website (or in your tag management solution) by your developers and then away you go!
Unlike cookies, we send hashed email and phone numbers rather than anonymous cookie IDs to build your audiences. These are much more stable identifiers (as cookies don’t stay on devices long if they are set at all) and provide a great way to target more of your known customers over a longer period of time on more devices and more channels. (We still think cookies are great for targeting unknown site visitors.)
Running both a cookie audience and Thirty-One Circles audiences is the best practice to reach as many people as possible.
Thirty-One Circles is the evolution of CRM list targeting and is much more optimised for paid media so that you get more performance from the same customers. Unlike CRM lists, our opt-in audiences are bigger, have greater segmentation options, integrate automatically and give you the most up-to-date data.
Thirty-One Circles has many of the attributes of a CDP however, it is focused on getting the maximum return for your investment for paid media and so is optimised towards audience activation rather than doing “everything for everyone”. This means you get all the performance from a CDP with a fraction of the cost and makes advanced audience segmentation and the ROI boost from this accessible to every advertiser.
We have one-click integrations with:
Data Sources:
- Google Analytics
- Google Analytics 4 (Big Query and API)
Audience Destinations:
- Meta
- Google Ads
- Snapchat
- TikTok
We also accept CSV imports to backdate any data you need and can create custom connections just for you. Please contact us to find out more.
Looking for CRM platforms or your web platform provider? Thirty-One Circles connects to the front end of your website rather than your CRM or website tech stack. This means Thirty-One Circles works with all tech stacks and CRMs to give you more flexibility while boosting your audience-building capabilities.
No! We update your data using the latest APIs so that your learning phase is not reset when we update the audience.
Yes! The platform is all based around stable first-party data so provides an answer to audience targeting after third-party cookies.
Data Consultancy
Need a helping hand before you start unlocking your audiences? Or do you have a different first-party data challenge all together?
We are here for you.

Let's start making a difference.