CoStar
Zillow Premier Agent
| Feature | CoStar | Zillow Premier Agent |
|---|---|---|
| Pricing | Contact sales | Contact sales |
| Free Plan | ✗ No | ✗ No |
| Rating | 4.1 / 5 | 3.8 / 5 |
| Best For | commercial-brokers, property-investors, asset-managers, appraisers | real-estate-agents, brokerages, real-estate-teams, new-agents |
| Founded | 1987 | 2006 |
| Property Data | ✓ | ✗ |
| Market Analytics | ✓ | ✗ |
| Tenant Information | ✓ | ✗ |
| Comparable Sales | ✓ | ✗ |
| Mapping | ✓ | ✗ |
| Forecasting | ✓ | ✗ |
| Alerts | ✓ | ✗ |
| Lead Generation | ✗ | ✓ |
| Crm | ✗ | ✓ |
| Listing Advertising | ✗ | ✓ |
| Agent Profile | ✗ | ✓ |
| Reviews | ✗ | ✓ |
| Market 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
✓ Zillow Premier Agent Pros
- Massive audience
- High-intent leads
- CRM included
- Brand exposure
✗ Zillow Premier Agent Cons
- Very expensive
- Lead quality varies
- Competitive market
The Verdict
CoStar is built for commercial brokers and property investors, with a focus on property-data and market-analytics. Zillow Premier Agent targets real estate agents and brokerages and leads with lead-generation and crm.
Both tools use custom enterprise pricing — you'll need to contact sales for a quote, which makes direct cost comparison difficult.
Neither tool offers a free plan, so factor the subscription cost into your decision from the start.
Feature-wise, CoStar offers broader built-in capabilities (7 features vs 6), while Zillow Premier Agent takes a more focused approach — which can mean a simpler, faster onboarding experience.
Bottom line: CoStar has a slight overall edge — but if massive audience matters most to you, Zillow Premier Agent may still be the right call.