CoStar
Umami
| Feature | CoStar | Umami |
|---|---|---|
| Pricing | Contact sales | Free / from $9/mo |
| Free Plan | ✗ No | ✓ Yes |
| Rating | 4.1 / 5 | 4.5 / 5 |
| Best For | commercial-brokers, property-investors, asset-managers, appraisers | indie-developers, privacy-focused-sites, bloggers, small-businesses |
| Founded | 1987 | 2020 |
| Property Data | ✓ | ✗ |
| Market Analytics | ✓ | ✗ |
| Tenant Information | ✓ | ✗ |
| Comparable Sales | ✓ | ✗ |
| Mapping | ✓ | ✗ |
| Forecasting | ✓ | ✗ |
| Alerts | ✓ | ✗ |
| Page Views | ✗ | ✓ |
| Custom Events | ✗ | ✓ |
| Realtime Dashboard | ✗ | ✓ |
| Utm Tracking | ✗ | ✓ |
| Multi Site | ✗ | ✓ |
| Api | ✗ | ✓ |
| Teams | ✗ | ✓ |
✓ 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
✓ Umami Pros
- Completely open-source and self-hostable for free
- Beautiful, clean dashboard interface
- No cookies required (GDPR/CCPA compliant by default)
- Lightweight script (under 2KB) does not slow sites
✗ Umami Cons
- Limited advanced analytics features
- No conversion funnel or cohort analysis
- Self-hosting requires database management
The Verdict
CoStar is built for commercial brokers and property investors, with a focus on property-data and market-analytics. Umami targets indie developers and privacy focused sites and leads with page-views and custom-events.
CoStar uses custom enterprise pricing, while Umami starts at $9/mo — a tangible advantage for teams with a fixed budget.
Umami 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.
Umami edges out on user ratings (4.5 vs 4.1). While both are well-regarded, that gap reflects real differences in user satisfaction worth considering.
Bottom line: Umami has a slight overall edge — but if most comprehensive commercial real estate database matters most to you, CoStar may still be the right call.