Addrex Address Validation API

Overview

Addrex standardizes and classifies U.S. addresses, returning match codes, confidence scores and coordinates. Teams can use it to clean address files or validate addresses in app-connected workflows such as shipping, onboarding, insurance underwriting, territory mapping and analytics. It is not suited to international address coverage, and organizations whose process requires USPS DPV or CASS certification should look elsewhere.

Key features

For batch work, users upload CSV or Excel files; Addrex detects address columns, processes them and returns cleaned data with output fields appended. It expands abbreviations, corrects typos, parses grid-style inputs and can add ZIP+4 when a match is available. That makes spreadsheet cleanup practical without requiring a developer to build a file-processing workflow, though batch files are retained for seven days by default unless deleted sooner.

The API accepts either a one-line address or structured fields and returns JSON with validation status, confidence, standardized fields and changes. Curl, Node.js and Python examples give developers a starting point for integration. Autocomplete suggestions and details are restricted to paid plans, so the free beta will not cover that part of an address-entry flow.

Security controls include TLS 1.2+ in transit, AES-256 encryption for stored data, revocable hashed API keys and exclusion of PII from application logs by default. Real-time API address data is not retained beyond the request. Addrex says its infrastructure providers maintain SOC 2 Type II compliance, while the company itself is working toward certification; it does not claim USPS DPV or CASS certification. Technical support is offered by email, and contact forms receive a response within one business day. Enterprise customers can arrange custom volumes, SLAs, private networking and dedicated support.

Pricing

Free Beta costs 0.00 USD per free and includes spreadsheet upload, map coordinates, a usage dashboard and CSV export. The plan permits 10,000 validation rows per day, requires email verification, and has no automatic overage billing; the plan details also state 10,000 address lookups/month, so confirm the applicable quota before relying on it for sustained volume. Autocomplete is excluded.

Pay As You Go costs 0.50 USD per contact, billed usage based, with no fixed monthly lookup bundle. Usage-based billing requires approval, and the plan includes spreadsheet upload, a usage dashboard and exports. It suits variable batch demand better than a fixed allowance, but the per-contact rate can be less predictable than a monthly tier.

Starter is 39.00 USD per month for 5,000 address lookups and 2,500 autocomplete lookups, with spreadsheet upload, map coordinates, CSV export and $0.30 per 1,000 overage lookups. It suits a modest production workflow that needs autocomplete. Growth costs 79.00 USD per month for 20,000 address lookups and 10,000 autocomplete lookups, with the same tools and overage rate, giving growing teams more headroom. Pro costs 149.00 USD per month for 50,000 address lookups and 25,000 autocomplete lookups; Scale costs 299.00 USD per month for 150,000 address lookups and 75,000 autocomplete lookups. Both retain the same spreadsheet, coordinate, export and overage terms, making them the higher-volume choices. Paid plans start at $39/mo.

Platforms

Addrex is available through an API and web interface. The API supports app-connected validation; the web workflow handles spreadsheet uploads.

Who it's for

Addrex suits U.S.-focused teams that need both bulk address cleanup and validation in an application, especially when coordinates, confidence scores or autocomplete matter. The free beta offers a substantial stated daily allowance for evaluation or lighter workflows, while paid tiers provide autocomplete and larger monthly quotas. It is a poor fit for international records or workflows that require USPS DPV or CASS certification.

Pros and cons

• Pros: CSV and Excel cleanup plus API validation cover both backlog processing and new entries.
• Pros: Standardized fields, confidence scores, match codes and coordinates provide more than a pass-or-fail result.
• Pros: Paid tiers include autocomplete, and the free beta has no automatic overage billing.
• Cons: Coverage is limited to U.S. addresses, so it cannot serve international validation needs.
• Cons: Autocomplete is unavailable on the free beta.
• Cons: Addrex does not claim USPS DPV or CASS certification, a material limitation for workflows that require either credential.

Alternatives

Address Verification Software is the broader comparison for readers who want to consider multiple options. Choose Melissa Global Address Verification if its API, Linux, self-hosted, web and Windows platform range better fits your deployment; its free plan allows 250 records per month, and a listed subscription starts at 40.00 USD per month for 1,000 records. Lob Address Verification is another API and web option: its free Developer plan includes up to 6,000 mailings, one user and paid additional verifications, making it worth comparing for mailing workflows.

Byteplant Address Validator may suit buyers seeking a Windows option alongside API and web access; its monthly subscription uses automatically added credits that roll over when unused. Hopewiser Address Validation is worth considering for Linux or self-hosted needs, with an online portal lookup priced at 0.07 GBP per contact. PostGrid Address Verification offers API, self-hosted and web access; its Standard Essential plan is 18.00 USD per month billed yearly for 2,000 monthly U.S. and Canada lookups, with additional lookups at $0.02 each. Smarty Address Verification may fit teams seeking broader platform support and a 42-day free trial with 1,000 lookups and no credit card requirement. AFD Postcode and Experian Address Validation are alternatives with web access; AFD also supports Windows.

Verdict

Addrex is a sensible choice for teams validating U.S. addresses in both spreadsheets and apps, particularly when its free beta or tiered lookup quotas match their volume. Its combined batch and API workflows are the clearest reason to choose it; look elsewhere if international coverage or USPS DPV/CASS certification is essential.