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CoStar vs Reonomy
CoStar is verified lease and sale comp data at scale; Reonomy specializes in unmasking commercial property ownership for off-market deal sourcing.
Side by side
| CoStar | Reonomy | |||||||
|---|---|---|---|---|---|---|---|---|
| Vendor | CoStar Group, Inc. | Altus Group (Reonomy) | ||||||
| Pricing model | Quote only | Subscription | ||||||
| Free tier | No | No | ||||||
| Deployment | Cloud | Cloud | ||||||
| Open source | No | No | ||||||
| Best for | Commercial real estate brokers, appraisers and investors needing verified comp and market-trend data. | CRE brokers, lenders and investors sourcing off-market deals and researching property ownership. | ||||||
| Pricing | Subscription licensing by market coverage and seats; not published. Pricing has not been verified yet — see the vendor's site. | Self-serve Monthly and Annual subscription plans (annual said to save ~30%), plus quote-based Bulk Data Feeds and API access.
Prices read from the vendor's own page on September 21, 2026. Vendors change prices; check the source before you budget. | ||||||
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Verdict
Both serve commercial real estate professionals, but they're built around different jobs. CoStar's core strength is verified data: a large research staff continuously confirms property characteristics, lease comps, sale comps and space availability across office, retail, industrial and multifamily markets, sold as the CoStar Suite subscription and cross-fed by CoStar's own Apartments.com and LoopNet marketplaces. Reonomy's core strength is ownership resolution — figuring out who actually owns a property, including ones held through LLCs and shell companies — plus predictive scores estimating how likely a property is to sell, aimed squarely at deal origination and off-market prospecting rather than market-level trend analysis.
A broker pitching a client on current market rents wants CoStar's comp data; the same broker trying to identify and contact an owner who hasn't listed anything wants Reonomy.
Choose CoStar if
- You need verified lease and sale comps, vacancy and absorption trends, or investment underwriting data at market scale.
- Cross-referencing against Apartments.com or LoopNet listing data is useful to your workflow.
- Your job is market research and valuation more than deal sourcing.
Choose Reonomy if
- You're sourcing off-market deals and need to identify and contact the actual owner behind an LLC or shell company.
- Predictive scoring on likelihood-to-sell matters more to you than historical comp accuracy.
- You want self-serve monthly or annual subscription pricing rather than a fully custom quote — Reonomy publishes a starting annual rate.
The honest caveat
These aren't full substitutes for each other, and many CRE professionals who need both ownership prospecting and verified comps end up running both tools rather than picking one. Reonomy is now sold as "Reonomy, an Altus Group business," which is worth knowing if vendor stability is part of your evaluation. See choosing a real estate data platform and data quality for how to evaluate either provider's underlying data claims.
Last reviewed September 22, 2026