Postcodes4u
Postcodes4u is a UK-only address lookup service, operated as a trading name of 3X Software Ltd, that resells Royal Mail's PAF database via REST API, JavaScript and free e-commerce plugins to help SMB merchants, charities and a handful of larger brands validate customer addresses at checkout.
- Company typePrivate
- Founded1984
- HeadquartersColwyn Bay, United Kingdom
- Headcount1–10
- GTM typeB2B
- OfferingSoftware
What Postcodes4u does
Postcodes4u is a UK-only address lookup and postcode validation service operating as a trading name of 3X Software Ltd, a privately held, bootstrapped company registered in England and Wales with its operational headquarters in Colwyn Bay, Wales. The core product is a REST API and JavaScript integration that queries the Royal Mail PAF (Postcode Address File) database — the canonical UK address dataset covering 28M+ addresses, 31M delivery points and 1.7M postcodes, updated with 4,000–5,000 daily changes — to return verified customer addresses from a postcode input. The company has been a registered Royal Mail PAF reseller for 15+ years, and 3X Software Ltd has been delivering software solutions for 30+ years.
The service is sold on a product-led, self-serve basis with no sales involvement. Distribution is anchored by free plugins for the dominant SMB e-commerce platforms: a WordPress plugin (supporting WooCommerce, Contact Form 7 and Gravity Forms), plus plugins for NopCommerce, Magento2, OpenCart and Zen Cart, alongside a Developer API and an Android mobile app on Google Play. Pricing is usage-based with three commercial models: a freemium trial of 30 free search credits, annual credit packs ranging from £10 (160 credits, 6.3p each) to £2,850 (117,000 credits, 2.4p each), and 12-month monthly subscriptions ranging from £15 to £200 per month. Credits accumulate, cancel-anytime provisions exist, and payment is processed through WorldPay (FIS) and PayPal.
The customer base spans SMB e-commerce merchants (address validation at checkout to reduce cart abandonment and failed deliveries), UK-registered charities (via Royal Mail's poweredbypaf.com discounted program) and a small set of named larger accounts (Morphy Richards, Woodland Trust, Beatson, BoxClever). Postcodes4u has made no external funding rounds, retains complete founder ownership, and operates with what appears to be a very small team given the absence of any disclosed management personnel.
Postcodes4u firmographics
Firmographics- Name
- Postcodes4u
- Legal name
- 3X Software Ltd
- Website
- https://postcodes4u.co.uk
- Company type
- Private
- Founded year
- 1984
- Operating status
- Operating
- Headcount range
- 1–10 employees
- Short description
- Postcodes4u is a UK-only address lookup service, operated as a trading name of 3X Software Ltd, that resells Royal Mail's PAF database via REST API, JavaScript and free e-commerce plugins to help SMB merchants, charities and a handful of larger brands validate customer addresses at checkout.
- Ownership category
- akta.pro rank
Where Postcodes4u is headquartered
LocationHeadquarters
- HQ city
- Colwyn Bay
- HQ country
- United Kingdom
- HQ region
- Europe
Offices3 records
Markets served
Postcodes4u business model
Business model- GTM type
- B2B
- Offering type
- Software
- Cost components
- Technology or R&D, Personnel, Operations, Infrastructure, Marketing or Sales
Revenue model
- Credit Packs (Annual): One-time purchase credit packs valid for 12 months from first use. Higher volume = lower per-lookup cost. Ranges from 160 credits (£10) to 117,000 credits (£2,850)
- Monthly Subscription: 12-month subscription with monthly payments ranging from £15 (200 credits/month) to £200 (5,800 credits/month). Credits accumulate and cancel anytime during subscription.
- Freemium Trial: 30 free search credits provided upon registration for new users to test the service
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Freemium | Pay-as-you-go | FREE TRIAL - 30 search credits |
| Usage-based | Annual | BASIC Annual - 1,200 credits at 4.2p each |
| Usage-based | Annual | STANDARD Annual - 8,300 credits at 3.3p each |
| Usage-based | Annual | PROFESSIONAL Annual - 43,000 credits at 2.7p each |
| Usage-based | Annual | Entry Level Annual - 160 credits at 6.3p each |
| Usage-based | Annual | Growth Annual - 500 credits at 5p each |
| Usage-based | Annual | Scale Annual - 2,860 credits at 3.5p each |
| Usage-based | Annual | Enterprise Annual - 19,000 credits at 3p each |
| Usage-based | Annual | High Volume Annual - 117,000 credits at 2.4p each |
| Subscription | Monthly | Small User Monthly - 200 credits/month at 7.5p each |
| Subscription | Monthly | Medium User Monthly - 540 credits/month at 5.6p each |
| Subscription | Monthly | Large User Monthly - 1,100 credits/month at 4.6p each |
| Subscription | Monthly | Very Large User Monthly - 2,600 credits/month at 3.9p each |
| Subscription | Monthly | Additional Monthly - 310 credits at 6.5p each |
| Subscription | Monthly | Additional Monthly - 820 credits at 4.9p each |
| Subscription | Monthly | Additional Monthly - 4,200 credits at 3.6p each |
| Subscription | Monthly | Additional Monthly - 5,800 credits at 3.4p each |
Go-to-market motion2 records
Distribution channels4 records
Marketing channels5 records
Postcodes4u product offering
Product offeringCore offering
Postcodes4u provides a UK address lookup and postcode validation service backed by the Royal Mail Postcode Address File (PAF) database. The service is delivered to businesses via a REST API, JavaScript integration, and free plugins for major e-commerce platforms (WordPress/WooCommerce, Contact Form 7, Gravity Forms, NopCommerce, Magento2, OpenCart, Zen Cart), plus an Android mobile app. It enables websites to capture and verify customer addresses quickly and accurately at checkout.
Product overview
Postcodes4U is a UK address lookup and postcode validation service built on Royal Mail PAF data. The core product is the Postcodes4U Address Lookup Service, which can be accessed via a free trial (30 search credits), annual credit packs (one-time purchase), or monthly subscription plans (12-month commitment). Integration options include free plugins for major e-commerce platforms: WordPress (with WooCommerce, Gravity Forms, and Contact Form 7 support), NopCommerce, Magento2, OpenCart, and Zen Cart. A Developer API is available for custom integrations. A free Android mobile app extends access to mobile devices.
Differentiator
Problem solved
Functional benefit
Products and services
- Postcodes4U Address Lookup Service UK address lookup and postcode validation service that uses the Royal Mail PAF database to capture and verify customer addresses quickly and accurately on websites. Targeted at UK e-commerce businesses, charities, and organizations needing reliable address validation at checkout and on forms.
- Developer API / Webservice REST API for developers to integrate UK postcode and address lookup into custom websites. Supports JSON responses, search by postcode or by Address ID, and returns company, address lines, town, county, postcode, grid references, and DPS data. Authentication via username and product key (format XXXX-XXXX-XXXX-XXXX).
- WordPress Plugin (WooCommerce, Gravity Forms, Contact Form 7) Free WordPress plugin that adds Postcodes4U address lookup to WordPress sites, with specific support for WooCommerce checkout, Gravity Forms, and Contact Form 7. Lets customers find their accurate address from a postcode on forms and checkout pages.
- NopCommerce Plugin Free plugin for NopCommerce e-commerce platform that adds UK postcode lookup to store checkout and account information pages once activated with Postcodes4U Key details.
- Magento2 Extension Free extension for Magento2 e-commerce stores that adds Postcodes4U address lookup functionality to the checkout process.
- OpenCart Plugin Free plugin for OpenCart stores that adds UK postcode lookup functionality on the storefront.
- Zen Cart Plugin Free plugin for Zen Cart e-commerce stores that adds Postcodes4U address finder functionality to checkout and account pages.
- Android Mobile App Free mobile application for Android phones and tablets that allows users to perform UK postcode lookups via Postcodes4U.
Quantifiable outcome
- Reduce cart abandonment rates by simplifying checkout address entry
- +2 more outcomes
Companies that use Postcodes4u
Customer profileNamed customers4 records
Segments4 records
Ideal customer profiles3 records
Postcodes4u technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- Yes
- API docs
- API detail
Core technology
AI maturity
App detail
Integration7 records
Feature4 records
Postcodes4u partnerships and signals
Strategic signalPartnerships
Ten partnerships are on record, tiered core and supporting.
- Royal MailcoreRoyal Mail PAF (Postcode Address File) database provider. Postcodes4u is a registered Royal Mail PAF Database reseller with over 15 years of partnership. All address data is sourced from Royal Mail's official database containing 28+ million UK addresses.
- WorldPay (FIS)corePayment processing gateway used for recurring subscription payments (FuturePay service). Processes monthly subscription payments for postcode lookup credits.
- PayPalsupportingAlternative payment processor for credit pack purchases alongside card payments through WorldPay.
- WordPress (WooCommerce, Contact Form 7, Gravity Forms)coreFree WordPress plugin available in official WordPress plugin directory supporting WooCommerce, Contact Form 7, and Gravity Forms for address lookup integration.
- NopCommercecoreFree NopCommerce plugin available at plugins.3xsoftware.co.uk for UK address lookup integration.
- Magento2coreFree Magento2 extension available for download for UK address lookup integration.
- OpenCartsupportingFree OpenCart plugin available for UK address lookup integration.
- Zen CartsupportingFree Zen Cart plugin available for UK address lookup integration.
- 3X Software LtdcoreParent company and sister plugin store operator. Postcodes4u is a trading name of 3X Software Ltd, providing software solutions for over 30 years.
- Google PlaysupportingAndroid mobile app distribution channel for postcode lookup service on mobile devices.
Scale indicators8 records
Recent moves5 records
Expansion highlights5 records
Postcodes4u competitors and assessment
Company assessmentBroad incumbents
- Experian Address Validation: Experian offers address validation and data quality as part of a much broader credit, marketing, and identity portfolio. While it overlaps functionally with Postcodes4u, Experian is a much larger incumbent serving enterprise customers across multiple data products.
- AddressDoctor (Experian Data Quality): AddressDoctor (now part of Experian Data Quality) provides global address validation and parsing services. It competes with Postcodes4u in UK capture while also serving multinational enterprises needing international address coverage.
- Google Address Validation API: Google's Address Validation API offers global address validation integrated with the Maps Platform. It competes at the high end of address quality and is bundled into Google's broader developer ecosystem, creating indirect pricing pressure for niche UK players.
Direct peers
- Smarty: Smarty (formerly SmartyStreets) is a US-headquartered address validation API provider with strong UK and international coverage. It competes with Postcodes4u in cross-border e-commerce address capture and offers comparable developer-first API products.
- Capscan: Capscan is a UK address validation and data quality specialist with decades of experience. It competes directly with Postcodes4u in UK address capture, cleansing, and customer data enhancement use cases.
- Hopewiser: Hopewiser is a long-established UK address validation and data cleansing provider using Royal Mail PAF and other datasets. It serves enterprise and mid-market customers with overlapping UK address capture functionality.
- Loqate: Loqate (part of GBG Group) is a leading UK and global address validation, geocoding, and data quality platform. It directly competes with Postcodes4u in UK address capture at checkout and is widely considered the category leader for enterprise customers.
- Ideal Postcodes: Ideal Postcodes is a UK-focused Royal Mail PAF reseller offering REST API and JavaScript address lookup with similar plugin coverage. It targets the same SMB e-commerce segment as Postcodes4u and competes on price and developer experience.
- Postcoder: Postcoder (by Alloy) provides UK address lookup via API with a focus on customer data quality. It serves the same UK e-commerce and CRM use cases as Postcodes4u and offers comparable pricing tiers and integration patterns.
Regional players
- Royal Mail PAF (poweredbypaf.com): Royal Mail's own PAF reseller program sells address data directly to UK customers, including charities at discounted rates. It is both a supplier to Postcodes4u and a competing channel for end customers seeking direct PAF access.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat4 records
Key risks6 records
Key highlights6 records
Customer concentration
Postcodes4u social profiles
Digital presencePostcodes4u financial estimates
Financial estimateRevenue estimate
Valuation estimate
Postcodes4u leadership team
Management profileNumber of profiles
Postcodes4u funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Postcodes4u M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Postcodes4u
What does Postcodes4u do?
Postcodes4u provides a UK address lookup and postcode validation service backed by the Royal Mail Postcode Address File (PAF) database. The service is delivered to businesses via a REST API, JavaScript integration, and free plugins for major e-commerce platforms (WordPress/WooCommerce, Contact Form 7, Gravity Forms, NopCommerce, Magento2, OpenCart, Zen Cart), plus an Android mobile app. It enables websites to capture and verify customer addresses quickly and accurately at checkout.
Is Postcodes4u a public or private company?
Postcodes4u is a private company. It is classified as founder individual operated bootstrapped and is currently operating.
When was Postcodes4u founded?
Postcodes4u was founded in 1984. It employs 1 to 10 people.
Where is Postcodes4u based?
Postcodes4u is headquartered in Colwyn Bay, United Kingdom, in the Europe region.
How does Postcodes4u make money?
Three revenue lines are on record. Credit Packs (Annual) is the primary driver. The others are monthly Subscription and freemium Trial.
Who are Postcodes4u's main competitors?
Broad incumbents on record are Experian Address Validation, AddressDoctor (Experian Data Quality) and Google Address Validation API. Direct peers are Smarty, Capscan, Hopewiser, Loqate, Ideal Postcodes and Postcoder. Royal Mail PAF (poweredbypaf.com) is listed as a regional player.
Does Postcodes4u have an API?
Yes. Postcodes4u offers a Webservice API for developers to integrate UK address and postcode lookup functionality into custom websites. The API supports JSON responses and provides endpoints for searching by postcode and by address ID. Authentication is done via username and product key. The API can return address details including company, address lines, town, county, and postcode. Grid references and DPS data are also available when searching by Address ID. Developer documentation is at www.postcodes4u.co.uk/support/Webservice%20Developer%20API.pdf.