Compare TIN Comply vs. Zip-Codes.com

TIN Comply is a vendor compliance platform that validates the people and companies an organization pays before the payment, the onboarding or the 1099 filing creates an IRS problem. It combines real-time IRS TIN and name matching, EIN and company lookup, sanctions and OFAC screening against 330+ global watchlists, address validation, FATCA GIIN and LEI checks, NPI and Medicare verification, and FMCSA carrier verification in one platform, with a guided W-9 portal, bulk file processing, a REST API and AI assistant connections to run it at any volume. The difference from a plain TIN lookup is the detail. Every result explains why a record failed: a name mismatch, the wrong TIN type, an invalid or unissued number, or a sanctions hit with the list and the match score. That lets accounts payable, tax and procurement teams send the vendor the right request instead of a generic form. When the IRS does not match a name and TIN, EIN discovery finds the identifier the IRS actually holds for that business so the record can be fixed without a phone call. The W-9 portal collects certifications with field-level instructions, e-signature, automatic reminders and revalidation the moment a corrected form comes back, and every check is logged with a timestamp for the CP2100, B-Notice and 972CG seasons. Reporting and audit trails show who validated what and when. TIN Comply runs on infrastructure with ISO 27001, SOC 2 and PCI DSS certifications. Plans start at $20 a month with every capability included, and no IRS e-Services enrollment is required. Managed compliance services are available for teams that want the work done for them. Free IRS compliance guides, calculators and templates are published at tincompliance.com.

The REST API designed for postal code data in the United States and Canada offers various functionalities such as address validation and standardization, which includes appending ZIP+4 codes, as well as radius searches that utilize centroid haversine calculations for distances up to 500 miles and true spatial polygon intersections for distances up to 250 miles, providing a percentage of results that fall within the specified area. Additionally, it computes point-to-point distances and bearings, supports multi-entity autocomplete for cities, ZIP codes, counties, metropolitan areas, Forward Sortation Areas (FSAs), and school districts, and offers enrichments per ZIP code, including Census ACS demographic data spanning 14 years with 542 different fields, along with lookups for congressional, state legislative, and school district information. There are six available endpoints that accept various inputs such as US ZIP codes, ZIP+4 codes, Canadian FSAs, Canadian postal codes, or geographic coordinates, with the capability to batch process up to 100 entries at once. This API operates on REST/JSON over HTTPS with API key authentication, CORS support, and adheres to the OpenAPI 3 specification, complete with a public Postman collection for ease of use. Users can access a free tier allowing for 2,500 requests per day without requiring a credit card, and the service does not expire, while paid plans are available at Developer for $49 per month, Professional for $149 per month, and Business for $499 per month, with credit packs ranging from $19 to $799. The comprehensive features and flexible pricing make this API an attractive option for developers and businesses in need of postal code data and related services.