A getAddress.io alternative, built in the UK.
Royal Mail PAF, licensed direct. 2.2p a lookup, pay as you go.
Postio is a UK address, email and phone validation API from Onno Group Limited, registered in England & Wales. Address autocomplete and postcode lookup on the full Postcode Address File, synced nightly. Swap the endpoint, keep your form.
Why people are looking.
The High Court of England and Wales ruled that Codeberry Ltd, which operated getAddress.io, and its director had infringed Ideal Postcodes' database rights. Public record.
The service stopped trading in the UK, and its WordPress plugin was closed on WordPress.org. Integrations built against it were left looking for a home.
getAddress.io is live again. Its own website footer gives the operating entity as GetAddress, LLC, at an address in Dover, Delaware. Checked 13 August 2026.
If your compliance answers need a named UK supplier and a licensed source for Royal Mail data, that is a question worth asking of any provider. Postio is a UK company and a direct PAF licensee.
Postio vs getAddress.io.
Facts as published by each provider, checked 13 August 2026. Where something isn't stated publicly, we say so rather than guess.
| POSTIO | GETADDRESS.IO | |
|---|---|---|
| Data source | Royal Mail PAF, licensed direct | Not stated publicly |
| Company | Onno Group Limited, England & Wales (08622799) | GetAddress, LLC — Dover, Delaware |
| Pricing model | Pay as you go, 2.2p per lookup | Monthly or yearly subscription |
| Free to try | 100 lookups, no card | Free plan, sign-up required |
| Address autocomplete | ||
| Postcode lookup | ||
| UDPRN lookup | ||
| Email validation | ||
| Phone validation | ||
| Distance calculation |
What maps to what.
| WHAT YOU'RE DOING | POSTIO ENDPOINT | NOTES |
|---|---|---|
| Autocomplete / typeahead | GET /address/search?q= | Same keystroke-by-keystroke shape. |
| Postcode lookup | GET /address/postcode/{postcode} | Every delivery point on the postcode. |
| Single address by id | GET /address/udprn/{udprn} | UDPRN is Royal Mail’s stable identifier. |
| Geolocation fields | Included in every result | Latitude, longitude, eastings, northings — no second call. |
| Distance between points | Not offered | We don’t do this one. Worth knowing before you switch. |
Authentication is an x-api-key header on every request. There are official SDKs for JavaScript, Python, PHP, Ruby, Go and .NET, a WordPress plugin, and a drop-in autocomplete widgetif you'd rather not touch the API at all.
Straight answers.
Yes. As of 13 August 2026 the service is live and its API is accepting authenticated requests. Its website footer gives the operating entity as GetAddress, LLC, at an address in Dover, Delaware.
In October 2025 the High Court of England and Wales ruled that Codeberry Ltd, which operated getAddress.io, and its director had infringed Ideal Postcodes’ database rights. UK operations ceased in February 2026. This is a matter of public record.
The Postcode Address File is Royal Mail’s official address database and it is licensed, not open. A provider holding a licence direct from Royal Mail is one you can name in your own compliance answers. Postio is a direct PAF licensee.
Most teams are done in under an hour. The request shapes map closely, both APIs return JSON over HTTPS with a key in the header, and there are SDKs for JavaScript, Python, PHP, Ruby, Go and .NET.
No. Pay as you go at 2.2p per lookup, no minimum, no monthly fee. New accounts get 100 free lookups without a card.
Postio is a UK company and the API is served from the UK and EU. Searches are not retained against your customers. See the privacy policy for the detail.
Ready in under a minute.
Sign up, grab a key, paste it in. Your first hundred lookups are on us.