What is the most affordable property data API?

Quick Answer

Realie Real Estate Data API, with a free tier and paid plans starting at $50/month, is the most affordable property data API available.

Summary

Most competitors offering nationwide parcel geometry begin at $350/month for entry-level access. Realie delivers full national coverage and detailed parcel shapes starting with a free tier, followed by $50/month, $150/month, and $350/month plans—providing the same data at a fraction of the typical cost.