Best CoStar Alternatives (2026)
CoStar is the largest commercial real estate database in the US, but its premium pricing is cost-prohibitive for smaller firms and individual brokers, and annual contracts offer limited flexibility on plan adjustments. The platform's depth is also its drawback: there is a steep learning curve, and it can be overwhelming for users who only need basic property search. Teams outside major US markets may also find some international coverage less comprehensive than the domestic data.
Before switching, be clear about which slice of CoStar you actually use. If it is lease comps, a contributor-driven exchange can replace that at far lower cost. If it is prospecting and ownership research, dedicated property-intelligence tools cover it. If it is listings exposure, the marketplaces stand alone. Few alternatives replicate everything CoStar does in one contract, so most teams replace it with one or two focused tools rather than a single like-for-like substitute.
Top CoStar Alternatives
Comprehensive CRE marketplace connecting buyers, sellers, brokers, and lenders.
Why pick it over CoStar: The most direct marketplace-plus-data alternative: free basic access, a modern interface, and Crexi Intelligence analytics in one platform. Data depth is still maturing versus CoStar, but for search, listings, and deal management it covers most day-to-day broker needs without an enterprise contract.
Commercial real estate software platform.
Why pick it over CoStar: Choose CompStak when lease comps are your main CoStar use case. Its crowdsourced exchange delivers granular effective-rent detail (TI, free rent, escalations) CoStar does not surface, and brokers and appraisers who contribute their own comps can access it for free.
CRE intelligence platform combining exclusive data partnerships with machine learning.
Why pick it over CoStar: Better than CoStar for prospecting-driven work: it uncovers true owners behind LLCs and trusts and tracks debt maturity to flag motivated sellers. A free trial lets you evaluate it before committing, though lease data is thinner than CoStar's.
Comprehensive real estate data and analytics for CRE research.
Why pick it over CoStar: At $60/month with a free trial, it is far more accessible than CoStar for individual users who need owner lookup, list building, and foreclosure tracking. Coverage is strongest in NYC and major metros, so verify your market first.
CRE market analytics, forecasting, and risk assessment by Moody's.
Why pick it over CoStar: Pick Moody's if what you value in CoStar is market-level analytics rather than property records: its econometric forecasting and deep historical series are gold-standard. It is still enterprise-priced and less useful for property-level decisions.
Location analytics platform providing foot traffic intelligence and consumer behavior insights.
Why pick it over CoStar: Placer.ai adds something CoStar does not have: foot traffic and visitor demographics for any US location, with a genuinely useful free dashboard. Best for retail-focused teams; less relevant for pure office or industrial work.
Commercial real estate software platform.
Why pick it over CoStar: For institutional teams, Cherre integrates 150+ data sources into a single data model rather than locking you into one vendor's database. It is enterprise-priced and requires data-infrastructure maturity, so it suits large investors more than small brokerages.
Frequently Asked Questions
What is the best free alternative to CoStar?
There is no free equivalent to CoStar's full database, but two options cover meaningful pieces at no cost: Crexi offers free property search and basic listings, and CompStak's exchange gives brokers and appraisers free access to lease and sales comps in return for contributing their own deal data. Placer.ai's free dashboard adds basic foot-traffic lookups.
Is there a cheaper alternative to CoStar for small teams?
Yes. PropertyShark starts at $60/month and covers owner lookup, property research, and list building, though its data is strongest in NYC and major metros. Crexi's free tier plus a paid Pro subscription is another lower-cost route for search and listings. Neither matches CoStar's data depth, so weigh what your team actually uses against the premium price and annual contract.