Are there any open source property databases that match the quality of CoStar without the massive annual subscription fee?
Download run
Fan-out diagram
The searches the AI actually ran for this prompt.
SEED QUERY
Are there any open source property databases that match the quality of CoStar without the massive annual subscription fee?
2 real searches · 1 real-search pass
Badge and edge weight = share of passes that produced the query. Hover a query for its intent and routing format.
Query classes
Google's semantic query class for every sub-query: what kind of answer each search is after, simulated vs real.
Classifying 2 queries…
Searches and sources
ChatGPT2 real searches · gpt-6
open source commercial real estate property database alternatives CoStar data platforms public parcel assessor deeds zoning listings Google ↗
free commercial real estate data platforms property records parcel data API open data alternatives CoStar Google ↗
- Crexi website · crexi.com
- CompStak website · compstak.com
- Regrid website · regrid.com
- Commercial Real Estate Database: 2026 Guide to CRE Data Platforms · reonomy.com
- Best Real Estate Data Providers for 2026 · attomdata.com
- GitHub - happyendpointhq/awesome-real-estate-apis: Curated list of real estate APIs and data sources by country: official, government open data, commercial, and scraping. · github.com
Queries
2 queries · click a column to sort
| Query / type | Search | Intent | Query class | Routing format | Cluster | Freq ↓ | Weight |
|---|---|---|---|---|---|---|---|
open source commercial real estate property database alternatives CoStar data platforms public parcel assessor deeds zoning listings OBSERVED | Google ↗ AI Mode ↗ | — | — | — | — | 1x of 1 | |
free commercial real estate data platforms property records parcel data API open data alternatives CoStar OBSERVED | Google ↗ AI Mode ↗ | — | — | — | — | 1x of 1 |