Welcome to GreatData!
GreatData is a North Carolina company. We have been creating postal code products since 1992. We were the first company to sell this data on the Internet (1993) and continue to improve our products with each new release. We've been expanding our staff and product lines to provide even better service than before. We invite you to review our products and join the thousands of companies who have trusted us over the years.
Who's the best? That's the question you'll be asking yourself as you compare us to the competition. Many competitors are cheaper, but why? We have confirmed that some competitors are getting started using bootlegged copies of our data—that's why it can be sold so cheaply—but they don't have the experience or the systems in place to maintain that quality. The question you need to ask is, "Can I afford to put cheap data in a quality application?"
Click on the 'Why We're Different' panel below for more details about our product quality.
100% money back guarantee—you can't go
wrong! 
At GreatData, we insist on quality!
In the postal code data market, there is our premium data and
there are postal service generic copies. What's the difference?
We manually verify our data! We've spent thousands of hours manually verifying our postal codes and
related data to ensure that it is the most accurate data possible!
Government data, which others sell as-is, is often outdated, inaccurate
and not suited for many commercial applications.
We standardize the spelling and capitalization of our place names. We use 'North',
not 'N', 'Saint', not 'St'. For instance, in
the USPS file, they will have 'ST THOMAS' in one place and 'SAINT
THOMAS' in another. They also will say that 'N Timbuktu' is an acceptable name, but 'North Timbuktu' isn't acceptable? It's very inconsistent and will make your application look the same.
Our latitude / longitude points are precise! Postal code boundaries change! We regularly check our coordinates
to ensure that they are true, population-based, center points. If the physical center of a zip code is in the middle of a lake, park, airport, etc., we move it to the center of a populated area.
Most competitors just use government-supplied latitude/longitude data. When we first got into this business, we did the same until a customer told us, "One of your coordinates is in the middle of the Atlantic Ocean." That's when we knew we had to manually verify everything. Our Pro-Zipcode with latitude and longitude has about 99% unique points (some locations have 2 or more zips in the same building, so it will never be 100%).
Click on the 'Why It's Better' panel below for more details about our product quality.
100% money back guarantee—you can't go wrong!
Our city names are correctly spelled. The USPS data is loaded with invalid city names. For instance, 02456 in the USPS file has had 'New Town, MA', instead of 'Newton, MA' for several years. If you need incorrect spellings of city names (in order to correct city spellings, see our Multi-City Spellings data).
Many counties in the USPS data are not the real primary county for
that ZIP Code.
We do our best to have the most accurate spelling of a city or county
name. For instance, DeKalb county, IL should not have a space in
it, but in the USPS data, it's 'De Kalb'. This may seem minor to
some people, but if you are trying to match up the county name with
other data such as county tax tables or Census data, the name won't
match, which could become a costly mistake.
Special characters: we use dashes and apostrophes, because many names need them. The USPS doesn't use these and inserts a space. Some examples are Saint Mary's County, MD; Coeur d'Alene, ID; Port O'Connor, TX; Winston-Salem, NC.
Our Deluxe file is unique! This has true multiple cities per zip code. This speeds up data entry address validation. When a ZIP Code crosses more than one city, this will list the most likely city which the zip belongs to, plus other cities which the ZIP Code crosses over.
We've been doing this longer. We've been refining our data for years! We don't sell generic copies of U.S. Postal Service data because they are loaded with errors. We are continually refining our established procedures which catch and correct errors in raw source data (postal services, Census Bureau, etc.) Our data is clean, current and accurate!
These are just a few examples of what you will encounter with government data. We hope it convinces you that ...
If you want great results, you need GreatData!
100% money back guarantee—you can't go wrong!