Addressify vs PostNL Address Validation API

Addressify is a cloud API for Australian address verification and processing in websites, forms, apps, and business systems. It can correct incomplete or inaccurate entries, including misspellings and incorrect postcodes, and parse free-form text into fields such as building name, unit, street, suburb, state, and postcode. Its autocomplete supports address entry; geocoding can return latitude and longitude from an address or identify an address from coordinates. It can also provide a meshblock for use with ABS sociodemographic data. Addressify uses the Australian government's G-NAF dataset and says it refreshes data every three months when new government data is released. The API supports HTTPS and can integrate with software that makes HTTP GET calls and handles JSON, including CRM and ERP systems and Microsoft Excel, Access, and Word. Lite validates street-level fields but not whether unit, level, or street numbers exist; Pro provides complete validation. The 30-day Trial costs nothing and permits 1,000 daily API calls. Lite costs $2,000 a year and Pro costs $4,000 a year; both prices are GST exclusive.

PostNL Address Validation API checks address data entered in a webshop or CRM for Netherlands and international destinations. As customers type a few letters or numbers, it can suggest matching addresses. Documentation describes coverage across more than 250 countries, regions, and island groups. Responses may include a locally formatted address, component fields, mailability and similarity scores, and latitude and longitude. The service supports correction, standardization, and autocomplete. Its international v3 endpoint uses POST and requires an API key with application/json content. CountryIso is mandatory; city, postal code, street, and house number are recommended inputs. PostNL lists plugins for Magento, WooCommerce, ShopWare, and Opencart for Dutch validation. The Benelux plan is free for PostNL parcel-contract customers and requires that contract. International validation starts at €0.02, paid once per API call, with bundle pricing varying by address volume. Returning multiple addresses in one response is temporarily unavailable. PostNL offers demos and data-solutions support.