Ahrefs
CoStar
| Feature | Ahrefs | CoStar |
|---|---|---|
| Pricing | From $129/mo | Contact sales |
| Free Plan | ✗ No | ✗ No |
| Rating | 4.7 / 5 | 4.1 / 5 |
| Best For | seo-professionals, agencies, content-marketers, enterprise | commercial-brokers, property-investors, asset-managers, appraisers |
| Founded | 2010 | 1987 |
| Backlink Analysis | ✓ | ✗ |
| Keyword Research | ✓ | ✗ |
| Site Audit | ✓ | ✗ |
| Rank Tracking | ✓ | ✗ |
| Content Explorer | ✓ | ✗ |
| Competitor Analysis | ✓ | ✗ |
| Site Explorer | ✓ | ✗ |
| Property Data | ✗ | ✓ |
| Market Analytics | ✗ | ✓ |
| Tenant Information | ✗ | ✓ |
| Comparable Sales | ✗ | ✓ |
| Mapping | ✗ | ✓ |
| Forecasting | ✗ | ✓ |
| Alerts | ✗ | ✓ |
✓ Ahrefs Pros
- Largest backlink database in the industry
- Excellent keyword difficulty scoring
- Content Explorer for content research
- Site Audit finds technical SEO issues
✗ Ahrefs Cons
- Very expensive — no free tier
- Learning curve for beginners
- Credits system for some features
✓ 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
The Verdict
Ahrefs is built for seo professionals and agencies, with a focus on backlink-analysis and keyword-research. CoStar targets commercial brokers and property investors and leads with property-data and market-analytics.
CoStar uses custom enterprise pricing, while Ahrefs starts at $129/mo — a tangible advantage for teams with a fixed budget.
Neither tool offers a free plan, so factor the subscription cost into your decision from the start.
Ahrefs edges out on user ratings (4.7 vs 4.1). While both are well-regarded, that gap reflects real differences in user satisfaction worth considering.
Bottom line: Ahrefs has a slight overall edge — but if most comprehensive commercial real estate database matters most to you, CoStar may still be the right call.