Addressr vs AddressZen

Addressr provides Australian address search, validation, and autocomplete through an API or self-hosted software. It uses G-NAF, which its maker describes as Australia's authoritative address database with more than 15 million addresses. Search covers addresses, localities, postcodes, and states or territories. Results include a stable address identifier, and an address-detail endpoint returns structured fields and available geocoding. Teams can use the hosted API through RapidAPI or run the software on their own infrastructure. RapidAPI handles signup, API keys, billing, and plan changes; current hosted prices and request limits are available there. Self-hosting requires Node.js 22 or newer and OpenSearch. The first full data download and index takes about an hour, depending on the machine and options. G-NAF is released every three months, and the maker recommends scheduling updates for a self-hosted index. Optional latitude and longitude geocoding for self-hosting requires more memory and increases indexing time. The self-hosted software is free at free under an Apache-2.0 licence, but the team supplies its infrastructure, hosting, monitoring, and data updates. Addressr also documents an MCP package for Claude, Cursor, VS Code Copilot, and other compatible assistants.

AddressZen provides address lookup, autocomplete, validation, and verification for US and international addresses through an API, browser extension, and web interface. Its validation can normalize formatting, expand street and city abbreviations, add missing ZIP+4 details, and correct typos. It advertises coverage in 240+ countries and support for 60+ languages, with local address data that includes USPS sources for US verification and details such as apartment and suite numbers. Suggestions are real-time and matching accounts for typos. Developers can use JavaScript libraries, a React component, or a REST API; listed integrations include Zapier, Adobe Commerce, WooCommerce, and form tools. Batch validation and API key controls are available, including lookup limits, allowed URLs, and configurable transaction-log retention. The free plan includes 1,400 verified addresses for one year. The Address bundle is $1,000, paid once for 55,000 verified addresses. Billing is per verified address, with no setup fees or monthly commitment. The API reference limits each IP to 30 requests per second, with a separate autocomplete limit.