CoStar Group vs REA Group
REA Group holds the stronger position because it turns its revenue into real profit while CoStar's net income has been squeezed to almost nothing despite similar market strength.
CoStar Group
CoStar runs CoStar Suite, LoopNet, and Homes.com, the main data platforms for US commercial real estate
REA Group
Runs realestate.com.au, Australia's biggest property listings and search platform
Dimension by dimension
| Dimension | CoStar Group | REA Group |
|---|---|---|
| Staying power of the core product | CoStar is rated defensible for now, still running the main commercial property data platforms but under more strain. | REA is rated hard to displace, running Australia's dominant listings site with no rival close on revenue. |
| Exposure to AI eating the product | AI is unlikely to absorb CoStar's core data platforms outright, though specific modules are already being picked at. | AI partly touches REA's product, but the core listings business still draws direct traffic. |
| How easily a giant could copy them | CoStar's position is also blocked from being copied by a larger player. | REA's position is blocked from being copied by a larger player. |
| Pressure from rivals | Zillow leads CoStar in residential listings through Homes.com, and named AI tools Prophia, Kira, and LeaseLens are drawing users away from CoStar's Lease Analysis module. | No dominant rival is pulling customers away from REA; View.com.au shut down and Domain trails far behind on revenue, though REA's growth has slowed to about 7%. |
| Financial footing | CoStar posted FY2025 revenue of $3.25 billion but net income of just $7 million, even as Q1 2026 revenue grew about 22.5 to 23% year over year. | REA posted FY25 revenue of A$1,672.8 million, EBITDA of A$969 million, and net profit of A$564 million, all growing double digits. |
Questions people ask
- Is REA Group or CoStar Group better positioned against AI disruption?
- REA Group is better positioned, since no rival is pulling customers away from its listings site and its profit margins remain strong. CoStar faces named AI tools already chipping away at one of its core modules, which puts more pressure on its position.
- Which company makes more money, REA Group or CoStar Group?
- REA Group converts far more of its revenue into profit, posting A$564 million in net profit on A$1,672.8 million in revenue. CoStar's revenue is much larger at $3.25 billion, but its net income was only $7 million in the same period.
- Does AI threaten CoStar's lease analysis business?
- Yes, tools named Prophia, Kira, and LeaseLens are drawing users away from CoStar's Lease Analysis module specifically. REA Group has not been named as facing a similar tool-specific threat.
- Who faces more competition, REA Group or CoStar Group?
- CoStar faces named competition on two fronts, with Zillow ahead in residential listings and AI tools eating into its lease analysis product. REA faces slowing growth but no rival currently pulling customers away.
- Could a big tech company copy REA Group or CoStar Group?
- Neither company's position is easy for a larger player to copy; both are described as blocked from that kind of copying. This makes the two roughly equal on that specific point.
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