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AddressZen
What it is
AddressZen provides lookup, autocomplete, validation, and verification for US and international addresses. It can normalize formatting, expand street and city abbreviations, add missing ZIP+4 details, and correct typos. The maker advertises verified coverage in 240+ countries and support for 60+ languages, using local address sources that include USPS data for US verification. Suggestions are real-time and typo-aware, with localized details such as US apartment and suite numbers. AddressZen is available through a web interface, browser extension, and API; developers can use JavaScript libraries, a React component, or a REST API. Listed integrations include Zapier, Adobe Commerce, WooCommerce, and several form tools. Batch validation and controls for API lookup limits, allowed URLs, and transaction-log retention are available. A free plan provides 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. Each IP is limited to 30 requests per second, with an additional autocomplete rate limit.
For and against
For
- Coverage advertised in 240+ countries
- Address cleanup and typo-aware matching
- API, extension, and web access
- Free plan includes 1,400 verified addresses
Against
- Per-IP limit of 30 requests per second
- Autocomplete has an additional rate limit
- Support hours are weekdays, 9 AM–5 PM EST
The verdict
AddressZen offers address cleanup and lookup through developer tools and form integrations. Consider its request limits and the listed bundle size when estimating usage.
Who it suits
AddressZen suits businesses and developers that collect or verify addresses across regions. It may be useful for forms that need address suggestions, cleanup, or batch validation.
Plans and prices
Free
1,400 verified addresses · US and international addresses · unlimited keystrokes
Read 14 Oct 2026 · addresszen.com
1,400 verified addresses
US and international addresses · unlimited keystrokes · optional renewal · account and technical support
Read 14 Oct 2026 · addresszen.com
5,000 verified addresses
US and international addresses · unlimited keystrokes · optional renewal · account and technical support
Read 14 Oct 2026 · addresszen.com
14,000 verified addresses
US and international addresses · unlimited keystrokes · optional renewal · account and technical support
Read 14 Oct 2026 · addresszen.com
55,000 verified addresses
US and international addresses · unlimited keystrokes · optional renewal · account and technical support
Read 14 Oct 2026 · addresszen.com
Free for 1 year
1,400 verified addresses
Read 7 Oct 2026 · addresszen.com
Address bundle
55,000 verified addresses · US and international addresses · Unlimited keystrokes · Account and technical support
Read 7 Oct 2026 · addresszen.com
On the record
- Address cleanup
- Its address validation standardizes formatting, expands street and city abbreviations, adds missing ZIP+4, and corrects typos.addresszen.com · read 7 Oct 2026
- Address database
- AddressZen says its database contains more than 750 million addresses.addresszen.com · read 14 Oct 2026
- API authentication
- API requests use bearer API keys, while management and licensee operations use separate credentials.openapi.addresszen.com · read 14 Oct 2026
- API functions
- The API supports two-step address suggestion and retrieval, US address verification, key management, email validation and phone validation.docs.addresszen.com · read 14 Oct 2026
- API key controls
- API keys can be restricted with daily and individual lookup limits, allowed URLs, and configurable transaction-log retention.docs.addresszen.com · read 7 Oct 2026
- API limits
- The documented default limit is 30 requests per second per IP, with an additional autocomplete limit.openapi.addresszen.com · read 14 Oct 2026
- API versioning
- The API uses a /v1/ URL version and promises backward-compatible additions within that version.openapi.addresszen.com · read 14 Oct 2026
- Automatic top-up
- Paid balances automatically top up when remaining credit reaches 10 percent of the plan total, with an email notification.addresszen.com · read 14 Oct 2026
- CASS verification
- Its US verification uses USPS CASS data to standardize formatting, expand abbreviations, add ZIP+4 and correct typos.addresszen.com · read 14 Oct 2026
- Changelog: TypeScript SDK
- The changelog records release of the TypeScript SDK on 28 September 2026.addresszen.com · read 14 Oct 2026
- CLI
- The official azn command-line tool requires Node.js 22+ and handles keys, address resolving, US verification and email or phone validation.docs.addresszen.com · read 14 Oct 2026
- Company legal identity
- IDDQD Limited is a UK private company incorporated on 21 November 2012 with a registered office at 207 Regent Street, London.find-and-update.company-information.service.gov.uk · read 14 Oct 2026
- Company size
- LinkedIn lists AddressZen as privately held with 2–10 employees.linkedin.com · read 14 Oct 2026
- Coverage
- The service advertises coverage of more than 240 countries and 60 languages.addresszen.com · read 14 Oct 2026
- Dashboard
- A web dashboard provides reports, API-key management and usage tracking.addresszen.com · read 14 Oct 2026
- Data source
- AddressZen says it uses authoritative local address sources, including USPS data for US address verification.addresszen.com · read 7 Oct 2026
- Developer access
- The maker offers JavaScript libraries, a React component, and a REST API for integration.addresszen.com · read 7 Oct 2026
- Documentation
- Documentation includes integration guides, API reference, SDK instructions, key management, testing, data coverage and changelog material.docs.addresszen.com · read 14 Oct 2026
