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Real Estate · head to head

CoStar vs Reonomy

CoStar logo

CoStar

Real Estate

Commercial real estate data subscription with strict per-seat licensing, sold on multi-year contracts and enforced through active anti-piracy litigation against password sharing

From
On request
Rated
-
Full reviewWebsite
Reonomy logo

Reonomy

Real Estate

Commercial property ownership and contact data platform, acquired by Altus Group for roughly $202 million and now sold on unpublished, increasingly enterprise-focused pricing

From
On request
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: CoStar per-seat licensing with no published rate makes budgeting for headcount growth unpredictable, since adding users typically requires a new negotiation rather than a self-service upgrade.; Reonomy pricing is not published, and the sales process has become more enterprise-focused since the Altus Group acquisition, which reportedly makes it less accessible for smaller, self-service buyers than it once was.
  • They diverge on capability: CoStar covers Property and ownership records, Reonomy covers Ownership records.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which CoStar and Reonomy actually diverge.

Attributes where CoStar and Reonomy differ
AttributeCoStarReonomy

Identical on both: starting price (On request), pricing model (quote), free tier (No), platforms (Web), user rating (Not yet rated), category (Real Estate).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in CoStar

  • Property and ownership records
  • Lease and sales comparables
  • Tenant and space data
  • Market analytics
  • STR hospitality data
  • CoStar Real Estate Manager

Only in Reonomy

  • Ownership records
  • Transaction history
  • Off-market prospecting
  • Portfolio analysis
  • Contact data
  • Market and property search

What people use each for

The jobs each tool is most often brought in to do.

CoStar

  • A commercial brokerage needing lease and sales comparables to support underwriting and pitch materialsnot Reonomy
  • An institutional investor or lender wanting standardised market analytics across submarkets for portfolio decisionsnot Reonomy
  • A corporate real estate team needing lease administration through CoStar Real Estate Managernot Reonomy
  • An appraiser needing sourced, defensible comparable transaction data for valuation reportsnot Reonomy

Reonomy

  • A broker sourcing off-market deals by identifying and directly contacting property owners matching acquisition criterianot CoStar
  • A lender researching an owner portfolio and financing history before extending creditnot CoStar
  • An investor doing outbound outreach to owners of a specific property type or size in a target marketnot CoStar
  • A firm already using ARGUS Enterprise considering Reonomy for data given the shared Altus Group ownershipnot CoStar

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

CoStar

  • Per-seat licensing with no published rate makes budgeting for headcount growth unpredictable, since adding users typically requires a new negotiation rather than a self-service upgrade.
  • CoStar actively pursues legal action against password sharing and unauthorised access, which is a genuine compliance and litigation risk for a firm that is loose about login discipline, intentionally or not.
  • A June 2026 antitrust lawsuit names CoStar alongside major brokerages over an alleged price-fixing scheme, a live legal matter that could affect the company standing or practices during a long-term contract.
  • Multi-year contract structures reduce a buyer flexibility to switch providers even if a cheaper or better data source emerges during the term.
  • The breadth of the platform (property, hospitality via STR, lease admin) means a firm often pays for modules it does not use just to access the specific data set it needs.

Reonomy

  • Pricing is not published, and the sales process has become more enterprise-focused since the Altus Group acquisition, which reportedly makes it less accessible for smaller, self-service buyers than it once was.
  • It is a data and contact-sourcing tool, not a valuation platform, so firms needing DCF modelling still need ARGUS Enterprise or an equivalent separately, even though both are Altus Group products.
  • Coverage and data freshness for ownership and contact information vary by market, and off-market sourcing quality depends on how current that contact data actually is.
  • Shared ownership with ARGUS under Altus Group means a firm concentrating spend with both products has less independent competitive leverage across its CRE software and data budget.
  • As with any owner-contact database, deliverability and accuracy of contact information degrade over time, and there is no independent public benchmark of Reonomy data accuracy to check ahead of purchase.

Pricing, plan by plan

CoStar

On request
  • CoStar$undefined/year
    • Per named user licensing, no published rate
    • Multi-year contracts standard
    • Terms explicitly prohibit password or login sharing

Reonomy

On request
  • Reonomy$undefined/year
    • Monthly and annual subscription options, annual saves roughly 30%
    • Pricing not published, increasingly enterprise-focused sales process since Altus Group acquisition
    • Cost scales with data access scope and seats

Which should you pick?

Choose CoStar if

  • You need property and ownership records.
  • You also want lease and sales comparables.
CoStar review

Choose Reonomy if

  • You need ownership records.
  • You also want transaction history.
Reonomy review

Questions people ask

Is CoStar or Reonomy better?
Neither clearly leads. CoStar starts at On request and Reonomy at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, CoStar or Reonomy?
CoStar starts at On request and Reonomy at On request.
Does CoStar or Reonomy run on more platforms?
Both run on Web, so platform support will not decide this one for you.
What is CoStar best used for?
CoStar is most often used for a commercial brokerage needing lease and sales comparables to support underwriting and pitch materials, an institutional investor or lender wanting standardised market analytics across submarkets for portfolio decisions, a corporate real estate team needing lease administration through costar real estate manager, an appraiser needing sourced, defensible comparable transaction data for valuation reports. Of those, a commercial brokerage needing lease and sales comparables to support underwriting and pitch materials and an institutional investor or lender wanting standardised market analytics across submarkets for portfolio decisions are not what Reonomy is typically brought in for.
What can CoStar do that Reonomy cannot?
CoStar covers Property and ownership records, Lease and sales comparables, Tenant and space data, Market analytics. Reonomy covers Ownership records, Transaction history, Off-market prospecting, Portfolio analysis.

Answered from the vendors’ own pages

CoStar: Can multiple people share one CoStar login to save cost?

No. Terms explicitly prohibit this, and CoStar has an active pattern of suing individuals and firms for unauthorised access under shared credentials.

Reonomy: Who owns Reonomy?

Altus Group, which acquired it in November 2021 for roughly $202 million; it sits in the same portfolio as ARGUS Enterprise.

CoStar: Is CoStar pricing published anywhere?

No. It is quote-only, licensed per named user, on multi-year contracts.

Reonomy: Is Reonomy the same as CoStar?

No. Reonomy focuses on ownership, contact and off-market sourcing data; CoStar is broader, covering listings, lease comparables and market analytics at larger scale.

CoStar: Is there a current legal risk in signing with CoStar?

A June 2026 antitrust lawsuit names CoStar and several major brokerages over an alleged price-fixing conspiracy; buyers with long-term contracts should track that litigation.

Reonomy: Is pricing available online?

No. Reonomy offers monthly and annual subscriptions with roughly 30% savings annually, but exact rates require a quote.

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