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ATTOM API alternative: Korzy vs ATTOM (and Estated)

If you are evaluating the ATTOM API or the Estated API, this page sets Korzy and ATTOM side by side. ATTOM sells U.S. property data through a REST API, an MCP server and bulk licensing. Estated is now part of ATTOM.1234 Korzy is an API and MCP server for U.S. parcels and the infrastructure around them. The comparison uses what each publishes about its own product, checked 5 November 2026.

Get a Korzy API keyCompare all U.S. parcel data APIs

Korzy vs ATTOM (and Estated): pricing, coverage and access

FeatureKorzyATTOM
Pricing modelMonthly plans with credits; extra credits in packsMonthly API plans; Premium priced on request5
Published entry price$49/month (Professional, 3,000 credits)Basic Property API from $500/month5
Free trial or free tierNo free trialFree 30-day trial API key1
Stated U.S. coverage161M+ parcel records across every U.S. county160+ million U.S. properties1
REST APIYes, REST with an OpenAPI specYes, REST (JSON and XML)1
MCP serverYes, hosted MCP server, with plugins for Claude Code and CodexYes, the ATTOM MCP Server2
Owner namesWhere published, with include_owner=true at twice the creditsYes: ownership and mortgage information in Basic and Premium5
Infrastructure and site contextWater and sewer service, protected areas and cleanup sites, rail, ports and freight, data-center projects, power plants, regional energy, grid transfer capacity and terrainSchools, neighborhood and points of interest; environmental risk and natural hazards56
Bulk files and licensingNot through the API (point and record lookups); dataset licensing and flat-file exports on EnterpriseYes: bulk property data licensing to host the datasets yourself3

When ATTOM may fit better

  • You need valuation data: ATTOM AVM, rental AVM and sales comparables are in the Premium option.5
  • You need transaction history such as mortgages, pre-foreclosure and expanded sales history.5
  • You want to host a nationwide property dataset on your own servers.3
  • You are an existing Estated API customer: ATTOM continues to support that API.7

When Korzy may fit better

  • You need land and infrastructure context at the same point as the parcel: water and sewer service areas, data-center projects, power plants, rail, ports and freight corridors.
  • An AI agent should call the data directly: Korzy runs a hosted MCP server, with a plugin for Claude Code and Codex.
  • You want a published self-serve price: plans start at $49 a month, and catalogs and summaries never spend credits.

Real example responses are on the parcel data pages for each county and in the Korzy API reference; plans and credits are on the pricing page.

What teams use Korzy for

Sources for the ATTOM comparison

Statements about ATTOM come from its own public pages, read on 5 November 2026. Statements about Korzy link to Korzy’s plans and prices and API documentation.

  1. ATTOM, Property Data API, www.attomdata.com/solutions/delivery/property-data-api/, checked 5 November 2026.
  2. ATTOM, MCP Server, www.attomdata.com/solutions/delivery/mcp-server/, checked 5 November 2026.
  3. ATTOM, Bulk data licensing, www.attomdata.com/solutions/delivery/bulk-data-licensing/, checked 5 November 2026.
  4. Estated home page, estated.com/, checked 5 November 2026.
  5. ATTOM, Property Data API pricing, www.attomdata.com/solutions/delivery/property-data-api/pricing/, checked 5 November 2026.
  6. ATTOM, announcement of the Estated acquisition, www.attomdata.com/news/company-news/attom-company-announcement-10/, checked 5 November 2026.
  7. ATTOM help, Is the Estated API being replaced?, cloud-help.attomdata.com/article/661-is-estated-api-being-replaced, checked 5 November 2026.

More parcel data API comparisons

Try Korzy on your own addresses

Plans include the API, the MCP server and every dataset. Catalogs and summaries are free, so you can check coverage before you spend credits.

Get a Korzy API keySee Korzy pricingKorzy MCP server docs