Choosing the right real estate data API depends on your specific use case. This comparison looks at ZipMarketData and ATTOM Data Solutions across coverage, freshness, pricing, and developer experience.
At a Glance
| Feature | ZipMarketData | ATTOM Data Solutions |
|---|---|---|
| Market stats API | ✓ Purpose-built | Available but complex |
| Property ownership records | No | ✓ |
| Tax history per parcel | No | ✓ |
| Rental yield by ZIP | ✓ Built-in | Requires multiple calls |
| Developer-friendly pricing | ✓ Request-based | Complex; often enterprise |
| Free tier | ✓ | No public free tier |
ZipMarketData Strengths
- Purpose-built for investment screening — yield, cap rate, DOM in one call
- Simple RESTful API with OpenAPI documentation
- Free tier available for prototyping
- Significantly lower cost for market analytics use cases
ATTOM Data Solutions Strengths
- Property-level data: ownership records, tax history, liens, permits
- National coverage including rural and sparse markets
- AVM valuations for individual parcels
- School, neighborhood, and environmental risk data
Use Case Recommendation
ATTOM is the right choice when you need property-level records: deed history, tax assessments, lien data, permit history. ZipMarketData is purpose-built for market analytics: screening, yield comparison, and affordability analysis at scale.
Developer NoteZipMarketData's free tier includes 100 requests/day with no credit card required — ideal for prototyping. Interactive docs are available at /docs.