Which providers offer nationwide bulk parcel and assessor data?

One row per provider, using only what each vendor states on its own site. A blank in a vendor’s published facts is marked “verify”, not filled in.

Ask for every county the vendor covers, with a record count for each, not just a national total. A national total can hide thin coverage in the rural counties you actually need.

Realie: Realie covers 180M+ addresses across 3,100+ counties in all 50 states. To check a county, open it under realie.ai/data. Each state page lists its counties, and each county page shows sample parcels and, where available, the number of properties Realie has indexed there.

Other vendors: Regrid publishes a coverage map where each county shows its parcel count, field-by-field coverage and refresh date. PropertyLayer publishes a coverage directory with current record counts and catalog prices by county. ATTOM states assessor data in more than 3,000 counties, LightBox states more than 3,000 U.S. counties and Cotality states 99.9% market coverage; for county-level counts, verify with ATTOM, LightBox and Cotality.

Coverage says a county is present. Completeness says how many records in it carry the fields you need, such as owner name, mailing address, assessed value, year built and living area. Ask for fill rates by field and by county, then test them on a sample.

Realie: the full record layout is published as the v3 property data schema on docs.realie.ai, which is also the shape of bulk full-record exports. Fields with no value are left out of a record rather than sent as null. On the API’s search and lookup endpoints, includeExplicitNulls=true returns every field, with null where the parcel has no value, so fill rates are easy to count. Some fields carry their provenance: geometrySource says how the parcel boundary was matched, zoningInfo.matchMethod says how the zoning designation was matched, and assessmentYear and taxYear date the assessor and tax values.

To measure completeness in your own counties before licensing, use the Realie free tier: 25 tokens a month on the same endpoints as paid plans. A search page of up to 100 parcels costs 1 token.

Other vendors: Regrid’s coverage map shows field-by-field coverage for each county. PropertyLayer says it publishes field paths and null behavior, and that field availability follows the source county. ATTOM states more than 7,200 attributes and LightBox several hundred standardized attributes; for per-field fill rates, verify with ATTOM, LightBox and Cotality.

Ask how often bulk files are redelivered, whether you get full files or only changes, and how each county’s own schedule affects that. Counties publish on independent schedules, so a vendor’s delivery cadence is not the same as how fresh each county’s records are.

Realie: records refresh on each county’s own publication cycle, which varies by jurisdiction. Some counties publish monthly, others quarterly or annually. For bulk, you set the delivery cadence when you scope the license.

Other vendors: Regrid says it pushes updated bulk files about every two weeks, replacing each updated county with a complete new file rather than a delta file. LightBox says it updates its data daily, with thousands of counties updated every month. ATTOM says its parcel boundary files are updated quarterly; for assessor data refresh, verify with ATTOM. PropertyLayer includes updates in annual licenses, timed to each county’s publication schedule, while a single county file is a one-time snapshot. For Cotality, verify with Cotality.

Ask what the license covers (geography, fields, users and systems), how long it runs, what happens to the data when it ends, and how the price changes as you add states.

Realie: bulk data is licensed separately from the self-serve API plans, on yearly contracts. The price depends on the geography, the fields and the refresh cadence you choose. There is no public bulk price list; email hello@realie.ai or use Request Bulk Data on realie.ai/bulk-property-data for a quote.

Other vendors: PropertyLayer lists a nationwide bulk license from $80,000 a year and catalog prices for single counties, and confirms the final price by email. Regrid sells single counties and states at listed prices in its Data Store, and its API page says to talk to its team about enterprise licensing above 10,000 records a month. The ATTOM, LightBox and Cotality pages checked do not list bulk prices; verify pricing and terms with each.

If your product shows parcel or owner data to your customers, or passes files to partners, the license has to allow it. Ask what you may display, what you may export, whether derived data counts, and what must be deleted when the license ends.

Realie: for display or redistribution rights under a bulk license, describe how the data will be shown or shared when you request a quote from hello@realie.ai. For self-serve API use, Realie’s published Terms of Use prohibit, without Realie’s written permission, using Realie data to build a product that competes with Realie’s services, including aggregating, repackaging or reselling the data or derived data products.

Other vendors: PropertyLayer sends redistribution-rights requests to its sales team. ATTOM lists flexible permitted uses, and publishing property web pages or portals among its bulk use cases; verify redistribution terms with ATTOM. Regrid publishes its API and tiles terms at regrid.com/terms/api; for redistribution under a bulk or enterprise license, verify with Regrid. For LightBox and Cotality, verify with each vendor.