Addrex Address Validation API vs Byteplant Address Validator

Addrex Address Validation API validates and standardizes U.S. addresses, returning match codes, confidence scores, coordinates, and standardized fields. It supports API requests as well as spreadsheet cleanup: users can upload CSV or Excel files, process detected address columns, and download cleaned data with output fields appended. Cleanup can expand abbreviations, correct typos, parse grid-style inputs, and append ZIP+4 when a match is available. The API accepts a one-line address or structured address fields and returns JSON with validation status, confidence, standardized results, and changes. Free Beta allows 10,000 validation rows per day, requires email verification, and does not include autocomplete. The listed Free Beta plan has 10,000 address lookups per month; paid plans start at $39 a month. Autocomplete suggestions and details are restricted to paid plans. Real-time API address data is not retained beyond the request, while batch files default to seven days of retention and can be deleted sooner. Addrex does not claim USPS DPV or CASS certification.

Byteplant Address Validator checks postal addresses against reference data to assess deliverability and suggest corrections. It checks street, house number, postal code, and city combinations for validity and formatting, with coverage across more than 240 countries and territories. Its APIs provide autocomplete suggestions from freeform searches, geocoding, duplicate identification, and asynchronous bulk verification for up to 100,000 addresses in one request. Rooftop-accurate coordinates are available when geocoding is enabled. A free account includes 100 checks and corrections without payment details or an automatic subscription, and a free trial is listed. Credits purchased through pay-as-you-go do not expire; monthly subscriptions add credits automatically and unused credits roll over. Address checks use 1.0, 2.5, or 5.0 credits according to region, with additional credits for geocoding. Integrations include Zapier, plugins for WordPress, jQuery, and Node.js, plus CRM and e-commerce systems. Byteplant says data stays in the EU and personally identifiable end-user information is deleted within 14 days. It states a 99.9% availability guarantee and typical API responses within 125 milliseconds. The service cannot determine whether a person has moved; an existing former address may still validate.