THE REAL DIFFERENCE
RentCast is a tool.
PropData is a platform.
RentCast does one thing well — it gives you rent estimates for a specific address or ZIP. If you're building a simple rent lookup feature, it works. The problem starts when you need more context, more scale, or more data types.
⚠️ At 10,000 calls/month, RentCast's per-call pricing runs $100–500 depending on your plan and endpoints. PropData is $49. At 50,000 calls/month the gap becomes $500–2,500 vs $49.
WHAT RENTCAST DOESN'T HAVE
Seven data sources
RentCast doesn't touch.
PropData bundles 9 data sources into every API call. RentCast focuses on rent estimates. Here's what you're missing if you only use RentCast:
✓ FRED macro data — Live 30-year mortgage rate, shelter CPI, housing starts. No other real estate API at this price point includes this.
✓ Redfin sale-to-list ratio — Are homes selling above or below list price? RentCast doesn't have this.
✓ Census ACS affordability — Vacancy rate, renter %, median income, rent burden. Market context RentCast skips.
✓ AI investor signals — Computed gross yield, market velocity, vacancy signal, rent burden — not raw data but actual answers.
WHEN TO USE RENTCAST
RentCast is great for
single address lookups.
Honest take: if you're building a feature that needs a rent estimate for one specific address and that's it — RentCast's per-address model works fine. It's purpose-built for that use case.
Where RentCast falls short is anything involving market-wide analysis, bulk screening, AI agents, or applications where call volume makes per-call pricing painful.
WHEN TO USE PROPDATA
PropData is built for
market intelligence at scale.
If you're screening 50 markets, building an AI agent that needs real estate context, automating weekly market reports, or building any application where you need to understand a market — not just one address — PropData is the right tool.
The 36-month history window covers the active investor sweet spot. You get enough trend data to understand momentum without the overhead of 20-year deed history you'll never use.