Reonomy vs PropertyShark: Ownership & Property Research for CRE (2026)

If you source commercial real estate, two questions dominate your research workflow: who owns this asset, and how do I reach them? and what do I actually know about this property and its history? Reonomy and PropertyShark both answer pieces of those questions, but they were built for different jobs — and confusing the two leads acquisitions teams to buy the wrong subscription.

Reonomy (now part of Altus Group) is a national ownership-and-contact intelligence platform built for off-market outreach at scale. PropertyShark is a property-records and reports tool that goes deep in specific metros — most famously New York City — with detailed parcel, title, and zoning history. This is not a "which one wins" piece, because for most firms the honest answer is "they solve different problems." Below is the buyer's framework for choosing — and where automation makes either one worth more.

A note on positioning: NextAutomation is not a data provider and does not rank #1 here. We're the AI enrichment layer that sits on top of whichever research tool you license — turning raw ownership records and property reports into clean, deduplicated, outreach-ready data inside your CRM. We'll be objective about where Reonomy and PropertyShark each win on genuine merit.

Reonomy vs PropertyShark at a Glance

We describe PropertyShark factually from its publicly stated product positioning; we do not fabricate API specifications it does not publish.

Buyer Decision Criteria

Before comparing features, decide which of these describes your actual research bottleneck. The right tool follows from the job, not the other way around.

• Are you sourcing or diligencing? If your bottleneck is finding owners to contact across many markets, that's a Reonomy job. If your bottleneck is understanding a specific property in depth within a market you focus on, that's a PropertyShark job.
• How wide is your geography? A national or multi-market acquirer needs consistent coverage everywhere — Reonomy's national footprint matters more than depth in any one metro. A firm concentrated in one or two metros (especially NYC) gets more from PropertyShark's depth.
• Do you need contact data or records data? Reonomy's differentiator is unmasking the LLC behind a parcel and giving you skip-traced contact details for outreach. PropertyShark's differentiator is the depth and downloadability of property reports, title chains, and zoning history.
• What's your compliance posture? Both are customer-licensed datasets. Reonomy explicitly restricts redistribution — its data is for your authorized internal use, not for rebuilding a database you resell. Any automation must respect those terms.
• How does this feed your stack? Research data is only valuable once it's clean and inside your CRM or deal pipeline. If you're copy-pasting owner records into spreadsheets, the tool isn't your bottleneck — the manual handoff is.

Head-to-Head on Real Merit

Where Reonomy genuinely wins

For national off-market sourcing and owner outreach, Reonomy is the stronger tool. Its core value is breadth plus contactability: it covers commercial parcels across the U.S., attempts to unmask the individuals or entities behind ownership LLCs, and appends skip-traced contact information so an acquisitions team can actually run a campaign. If you're building a list of "every industrial owner in five Sun Belt metros who has held for 10+ years," Reonomy is purpose-built for that motion.

The honest caveats: contact and ownership data is probabilistic — accuracy varies by market and by how complex the ownership structure is — and the data is customer-licensed with redistribution restrictions, so you build your pipeline on it but you don't republish it.

Where PropertyShark genuinely wins

For deep property research and diligence in covered metros, PropertyShark is the stronger tool. In markets where it has depth — New York City being the canonical example — it delivers detailed, downloadable property reports: ownership records, title and deed history, building characteristics, zoning, and comparable transactions. An analyst preparing for an IC discussion on a specific Manhattan asset can pull a richer single-property picture from PropertyShark than from a national breadth-first tool.

The honest caveats: its strength is uneven by geography — depth in covered metros does not mean uniform national coverage — and it is a subscription web platform that, as of this writing, publishes no dedicated public API/integration page. Treat any programmatic-access question as something to confirm directly with the vendor and within your license terms; don't assume an API exists.

The honest verdict

There is no single winner because the two tools answer different questions. Pick Reonomy if your job is national/multi-market sourcing and owner outreach. Pick PropertyShark if your job is deep, report-grade diligence in the metros it covers. Many firms that operate at scale in a single deep market (e.g., NYC-focused investors) license both — Reonomy to find owners, PropertyShark to research the property — and that combination is a perfectly rational stack.

Adjacent Tools Worth Knowing

Neither tool is the only option in the property-and-ownership research layer. Depending on your geography and integration needs, these adjacent platforms are worth evaluating — and several publish real, integrator-friendly APIs:

• ATTOM Data — national property, ownership, deed, mortgage, and tax-assessor data with a documented, integrator-friendly API. A strong choice when you want bulk parcel and ownership data wired directly into your own systems.
• Regrid — nationwide standardized parcel boundaries and ownership records with a clean API and mapping layer. Excellent for parcel-level geospatial work and stitching ownership to precise boundaries.
• Cherre — a data unification platform rather than a single dataset; it connects and normalizes multiple property and ownership sources into one model, which is useful if you're blending several feeds.

For the full landscape of sourcing and comps platforms — where these ownership tools sit relative to CoStar, Crexi, and CompStak — see our companion guide: Best CRE market data and comps platforms.

Lifecycle Fit: Where Each Tool Earns Its Subscription

Ownership and property research touches more of the deal lifecycle than most teams realize. Here's where Reonomy and PropertyShark each pull their weight:

• Sourcing: Reonomy leads — building target lists of owners by asset class, geography, and hold period, then enabling outreach. PropertyShark contributes by validating which specific assets in a covered market are worth pursuing.
• Underwriting: PropertyShark's property reports (building characteristics, zoning, prior sales) feed assumptions; Reonomy's transaction and ownership history adds context on seller motivation.
• IC & Diligence: PropertyShark leads in covered metros — title chains, deed history, and detailed parcel records are exactly what an IC memo needs. Reonomy confirms the counterparty behind the LLC.
• Capital Raise: Clean, well-attributed property and ownership facts make a sponsor's pitch more credible to LPs — both tools supply source-of-truth detail for the deal narrative.
• Asset Management: Ongoing ownership monitoring (have neighboring parcels changed hands?) supports off-market expansion and assemblage strategies.
• LP / IR Reporting: Property facts and ownership context flow into portfolio narratives — though the reporting itself benefits far more from automation than from the data tool.

Where AI Changes the Answer

Here's the uncomfortable truth about both Reonomy and PropertyShark: the subscription is rarely the bottleneck. The bottleneck is what happens after you pull a record — the analyst copy-pasting owner names into a spreadsheet, deduping LLCs by hand, reconciling a PropertyShark report against the CRM, and figuring out which of three contact numbers is current. That manual enrichment work is where deals leak and where weeks disappear.

This is exactly the layer NextAutomation operates in. A property-enrichment automation takes the records you've legitimately pulled under your own license, normalizes ownership entities, deduplicates parcels and owners, fills gaps from your other authorized sources, and writes clean, structured records straight into your CRM or deal pipeline — no copy-paste, no spreadsheet purgatory. It respects each provider's terms (Reonomy's data stays in your authorized internal use; nothing is redistributed) because it works on data you already have the right to use.

Paired with an off-market deal-sourcing workflow, that enriched data becomes a live pipeline: ownership and property signals feed a scored target list, outreach is sequenced automatically, and your research subscriptions finally produce deals instead of static lookups. The data tool finds the owner; the automation turns that into a contacted, tracked, scored opportunity.

To see how this research layer fits the broader CRE technology stack — sourcing, underwriting, PM/accounting, IR, and the AI automation layer above them — read our pillar guide: The complete CRE software stack.

Bottom Line

Reonomy and PropertyShark are not competitors so much as complements. Reonomy wins for national ownership intelligence and owner outreach; PropertyShark wins for deep, report-grade property research in the metros it covers. Choose based on your real bottleneck — sourcing breadth vs. diligence depth — and don't be surprised if a deep-market firm rationally licenses both.

Wherever you land, the highest-leverage move isn't the subscription — it's automating the enrichment and CRM handoff so the data you pay for actually turns into deals. If you want to map which automations give your firm the fastest payback on your current research stack, our free roadmap call is the right place to start.