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Power precise and personalised experiences with location data
Use verified addresses and geolocation to deliver more relevant content and offers to every customer.
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Personalisation is only as effective as the data behind it
Personalised experiences depend on knowing where your customers are, what they need and how to reach them. If that underlying data is inaccurate, even the best campaigns and product features fall short. Mailshots get sent to the wrong address. A location-based offer that triggers for the wrong postcode. Nobody checking if the mobile numbers on customer records are still active before sending the promotional texts.
The data quality problem and the personalisation problem are the same. Fix one and you make real progress on the other.
How does poor data limit what's possible?
Location-based features and campaigns underperform when address data is inconsistent or incomplete
Customer segments built on unverified contact details include records that can't be reached
Geocoding is inaccurate when addresses haven't been validated, making proximity-based logic unreliable
Personalisation at scale requires consistent data structures across systems, which manual address entry rarely produces
How can Postcoder help?
Postcoder gives you verified, structured address data and precise geolocation for every customer, captured at the point of entry.
Every address lookup returns rooftop-level latitude and longitude coordinates alongside the validated address. That means location-based features in your product, from store finders and delivery radius checks to content targeting and regional pricing, work from accurate data rather than approximations. UPRN identifiers link records consistently across systems, so a customer is the same customer whether their address appears with or without a flat number.
For SaaS platforms building these features into their own products, Postcoder's single API handles address, email, and mobile validation in one integration, with fine-grained controls for rate limiting and domain restrictions built in.
What is Postcoder?
Postcoder is a multi-feature API you can integrate into your website or app quickly and easily using pre-built integrations, sample code and API reference, all within clear and well-structured docs. You can be up and running in minutes with a free trial, and Postcoder's support specialists are always on hand if you need help.
Your personalisation toolkit
Address lookup with geocoordinates
Every address lookup returns rooftop-level latitude and longitude as standard. Accurate enough to power proximity features, delivery radius logic, and location-based targeting within your product or platform.
Learn more about address lookupUPRN data
A Unique Property Reference Number is included with every result, giving each address a persistent identifier that stays consistent regardless of how it is written. Useful for matching customer records across systems and building reliable location segments.
Learn more about UPRN dataOS National Geographic Database (NGD)
The NGD is the most comprehensive geographic dataset available in Great Britain, covering over half a billion geographical features updated daily. It goes beyond a standard address result to include property coordinates, transport networks, administrative boundaries and more. For platforms that need richer location intelligence to power advanced features, it's the most complete source available.
Learn more about OS NGDEmail and mobile validation
Confirms that the contact details attached to each customer record are real and reachable. Keeps your segments clean and your communications effective.
Learn more about email validation Learn more about mobile validation
What our customers say
"After integrating Postcoder API in our apps, its geocoding functionality and mapping services suggest and autocomplete the user's full address, which gives a great user experience in the application."
J.H. Software Engineer / G2 review
"Postcoder has been great; there has been a noticeable quality increase in our campaigns. In some the pickup rate went from 30% to 60-70% and our appointment ratings for a campaign went from a 15% average to 40% for one client!"
Daniel Jones IT Technician / Lead Pronto
"The additional features help create a more detailed profile of customers and verify key details, improving data accuracy and customer insights. The service is fast, efficient, and integrates seamlessly into our systems."
Verified user / G2 review
Award-winning API with top performance, easy admin and great support
Businesses rate Postcoder 4.7 stars out of 5 on the world's most trusted software marketplace.
