CoStar
Realtor.com
| Feature | CoStar | Realtor.com |
|---|---|---|
| Pricing | Contact sales | Free only |
| Free Plan | ✗ No | ✓ Yes |
| Rating | 4.1 / 5 | 4 / 5 |
| Best For | commercial-brokers, property-investors, asset-managers, appraisers | real-estate-agents, home-buyers, sellers, investors |
| Founded | 1987 | 1996 |
| Property Data | ✓ | ✗ |
| Market Analytics | ✓ | ✗ |
| Tenant Information | ✓ | ✗ |
| Comparable Sales | ✓ | ✗ |
| Mapping | ✓ | ✗ |
| Forecasting | ✓ | ✗ |
| Alerts | ✓ | ✗ |
| Property Listings | ✗ | ✓ |
| Market Data | ✗ | ✓ |
| Agent Profiles | ✗ | ✓ |
| Lead Generation | ✗ | ✓ |
| Home Values | ✗ | ✓ |
| Neighborhood Data | ✗ | ✓ |
✓ CoStar Pros
- Most comprehensive commercial real estate database
- Detailed property and tenant information
- Advanced analytics and market forecasting
- Verified data with dedicated research teams
✗ CoStar Cons
- Very expensive subscription costs
- Primarily focused on commercial real estate
- Steep learning curve for new users
✓ Realtor.com Pros
- Official NAR partnership
- Accurate listings
- Market data
- Brand credibility
✗ Realtor.com Cons
- Expensive advertising
- Less traffic than Zillow
- Limited free features
The Verdict
CoStar is built for commercial brokers and property investors, with a focus on property-data and market-analytics. Realtor.com targets real estate agents and home buyers and leads with property-listings and market-data.
Both tools use custom enterprise pricing — you'll need to contact sales for a quote, which makes direct cost comparison difficult.
Realtor.com has a free plan, which gives it a meaningful edge for individuals and small teams exploring their options. CoStar requires a paid subscription from day one.
Feature-wise, CoStar offers broader built-in capabilities (7 features vs 6), while Realtor.com takes a more focused approach — which can mean a simpler, faster onboarding experience.
This is a genuinely close comparison. If you can, sign up for both free trials (where available) and run a one-week test with your actual team tasks before deciding.