What are the best ATTOM alternatives for property data?

Pick ATTOM if you rely on a negotiated enterprise bundle, need ATTOM’s breadth of correlated attributes (AVM, rental AVM, comps, neighborhood, school, and risk data — verify field lists with ATTOM), or already integrated ATTOM ID across products. ATTOM’s Property Data API page (checked 2026-11-03) cites 160+ million U.S. properties and 99% of the U.S. population, REST access in JSON or XML, and a free 30-day trial API key. Its pricing page lists Basic Property API plans from $500/month, with Premium pricing via sales.

Pick ATTOM’s MCP Server if your buyer is an enterprise AI platform that wants governed MCP access to ATTOM Intelligence rather than wiring REST yourself — authentication, permissions, and usage monitoring are centralized on ATTOM’s MCP product page. That path is complementary to, not a substitute for, mapping county-level public-record fields your app requires.

In Realie’s September 2026 benchmark (linked under Sources), ATTOM Basic Profile averaged 232.6 ms mean, separate from Realie’s published average — acceptable for many batch and reporting workflows. Method: ATTOM `/property/basicprofile` on a 100-property test set across 25 U.S. states. Each property queried once; request order randomized; persistent HTTP session; connection warm-up excluded. ATTOM returned property for 100/100 requests. Observed September 2026; latency varies by network, load, query type, and geography.

Realie targets product and agent workflows on county public records: parcel geometry, owner of record, mailing address, assessment, tax, sale history, mortgages, liens, and zoning — 180M+ addresses · nationwide U.S. county coverage. Free (25 tokens/mo), $50 (1,250 tokens), $150 (6,000 tokens), $350 (30,000 tokens). Month-to-month; same endpoints on every tier; allowance shared Platform + API. 1 token = one successful API call (HTTP 200); 404/401/403 = 0. Allowance shared Platform + API. Search endpoints (property/search, location, owner): limit max 100, paginate with cursor — one 200 = 1 token whether the page has 1 or 100 properties. address/parcelId = 1 property per token. Overage: $0.15 / $0.05 / $0.025 / $0.012 on Free / $50 / $150 / $350 (realie.ai/pricing). MCP signs in with OAuth at app.realie.ai/api/mcp (no API key in the host config) and the CLI signs in through the browser; both then use the API key on the same self-serve account as REST (see realie.ai/agents.md).

Realie is not an ATTOM feature-for-feature clone — no substitute for ATTOM-quoted AVM/comps bundles unless you validate field parity. Realie is not for FCRA-regulated credit, insurance eligibility, employment, or tenant screening, and does not provide MLS listing inventory.

BatchData — Investor-oriented property data plus skip-trace and contact enrichment on separate product lines; Property Data: Growth $1,000/mo (100k records), Professional $2,500 (300k), Scale $5,000 (750k), Enterprise $10,000 (3M). Verify on batchdata.io/pricing (Property Data tab); skip-trace is a separate product line.

RentCast — Developer API with free tier (50 requests/mo on RentCast’s API docs), rental and value estimates, and listing search — Developer $0/mo (50 requests, $0.20 overage); Foundation $74/mo (1,000, $0.06); Growth $199/mo (5,000, $0.03); Scale $449/mo (25,000, $0.015). Month-to-month, no long-term contract. Not in Sept 2026 Realie vs ATTOM study — verify independently. Published on rentcast.io/api (checked 2026-11-03); verify with RentCast.

Regrid — Parcel boundaries and GIS-first workflows; self-serve API plan pricing: verify with Regrid. Regrid publishes enterprise licensing above 10,000 records/mo (regrid.com/api).

Cotality (CoreLogic) — Sales/enterprise U.S. property data API — verify pricing and latency with Cotality.

We do not score vendors subjectively. Each alternative is evaluated on published, quantifiable signals you can re-check on vendor sites:

1. Volume-normalized monthly cost at 100,000 properties per month — one row per vendor, cheapest published plan that covers that volume (Cheapest published plan that covers this volume; verify on vendor sites.)

2. Self-serve monthly floor and included quota on that cheapest covering plan (or “contact sales” when not published)

3. MCP and CLI access — Realie offers MCP and CLI on self-serve accounts. ATTOM, RentCast, Regrid, and BatchData also market MCP servers, but access terms differ (BatchData lists its MCP Server under Enterprise & Custom Solutions with custom pricing on batchdata.io/pricing), so compare auth model, plan requirements, and per-call cost (verify on vendor docs)

4. Latency where published: Realie ~20 ms average (docs.realie.ai); ATTOM mean 232.6 ms only from Realie’s September 2026 benchmark (blog.realie.ai, linked under Sources) — no other competitor millisecond claims

5. Primary dataset fit — county assessor/recorder public records vs listings, AVM/rent estimates, skip-trace, or enterprise bundles — matched to your required field list

Each vendor bills different units (tokens, records, API reports, calls). Compare monthly floor and volume scenarios — not a single mixed $/unit column. Verify competitor pricing before budgeting. One row per vendor — cheapest published plan that covers 100k properties/mo. Realie shows two call patterns: ~1,000 tokens via search pagination at limit=100 fits Tier 1 ($50/mo), while 100,000 single address/parcelId lookups use 100,000 tokens — Tier 3 ($350, 30,000 included) plus 70,000 × $0.012 overage = $1,190/mo, more than BatchData Growth ($1,000/mo for 100,000 records). RentCast’s row shows the same two patterns: ~$30/mo via /properties search pages (up to 500 records per request) and $1,574/mo via single lookups. ATTOM lists Basic Property API plans from $500/month but does not publish the call volume included, so the ATTOM row shows “Verify with ATTOM”.

1 token = one successful API call (HTTP 200); 404/401/403 = 0. Allowance shared Platform + API. Search endpoints (property/search, location, owner): limit max 100, paginate with cursor — one 200 = 1 token whether the page has 1 or 100 properties. address/parcelId = 1 property per token. Overage: $0.15 / $0.05 / $0.025 / $0.012 on Free / $50 / $150 / $350 (realie.ai/pricing).