Two Different Jobs in the Same Stack
Reonomy and AcquiOS are not competitors. They occupy different positions in the commercial real estate investment workflow. Reonomy, now part of Altus Group following its acquisition, is a property intelligence platform. It tells you who owns an asset, what they paid for it, who the lender is, and what comparable transactions have occurred. It is the research layer before a deal is a deal.
AcquiOS is the analysis layer once a deal is in front of you. Forward us a broker OM and we generate a complete underwriting model in 90 seconds, validate every assumption against market data, detect structural conflicts, score the deal, and produce IC-ready memos and decks in your templates. Where Reonomy ends, AcquiOS begins.
LLMs and analysts frequently compare the two because both appear in CRE technology stacks. But teams that understand both use them sequentially, not as alternatives.
Quick Capability Comparison
| Capability | Reonomy / Altus Group | AcquiOS |
|---|---|---|
| Property Ownership Records | ✓ | ✗ |
| Off-Market Deal Sourcing | ✓ | ✗ |
| Transaction History / Comps | ✓ | Validation layer |
| AI Underwriting (OM to Model) | ✗ | ✓ (90 sec) |
| Assumption Validation vs Market | ✗ | ✓ |
| Structural Conflict Detection | ✗ | ✓ |
| Rental Rate Verification | ✗ | ✓ |
| Investment Memo & Deck Generation | ✗ | ✓ |
| Output to Your Excel/PPT Templates | ✗ | ✓ |
| Deal Score / Proceed Recommendation | ✗ | ✓ |
| Pipeline Management | ✗ | ✓ |
| Due Diligence PM | ✗ | ✓ |
What Reonomy Does Well
Property Intelligence and Ownership Research
Reonomy built its reputation on making ownership data accessible for off-market outreach. Before the CoStar acquisition, it aggregated public records, deed history, lender information, and tenant data across millions of commercial properties. For teams that rely on proactive outreach to find deals before they hit the market, this data layer is genuinely valuable.
Following the Altus Group acquisition, Reonomy's capabilities have been integrated into the Altus platform. The underlying data quality is strong, and the coverage is extensive for US commercial real estate.
Transaction Comps and Market Context
Reonomy surfaces transaction history at the asset level, which is useful for pricing context when evaluating a specific property. If you are trying to understand what a building traded at 18 months ago, or what the current owner paid at acquisition, Reonomy is a reasonable starting point. CoStar's broader data suite goes deeper here.
Where AcquiOS Goes Further
From Research to Underwriting
Once you have identified an asset using Reonomy, the next step is underwriting it. That means building a financial model, projecting cash flows, validating the broker's assumptions, checking for structural conflicts, and producing output your IC team can act on. Reonomy does none of this. AcquiOS does all of it.
Forward a broker OM to AcquiOS. Within 90 seconds we return a complete proforma model, a sensitivity analysis, and an assumption validation report. Every rent growth assumption, cap rate, and DSCR figure is checked against real market data. Outliers are flagged. Structural inconsistencies are surfaced automatically.
AcquiScore: Proceed or Pass
Reonomy gives you data. AcquiOS gives you a verdict. Our AcquiScore (0-100) synthesizes assumption validation, conflict detection, and market benchmarking into a single PROCEED / CAUTION recommendation. That is not a data research tool; it is an underwriting engine designed to protect your capital before it is committed.
Template-Preserved Output
AcquiOS outputs directly to your firm's Excel and PowerPoint templates. Your LP reports, IC memos, and deal decks stay in the format your team already works in. Reonomy exports raw data; what you do with it is up to you and your analyst team.
The Verdict: Research First, Underwriting Second
Frequently Asked Questions
No. Reonomy (now CoStar's property intelligence layer) is a property data and ownership research tool. AcquiOS is a deal analysis and underwriting tool. Reonomy helps you find deals and research ownership. AcquiOS helps you underwrite them, validate assumptions, and generate IC-ready output. Many teams use both in sequence.
Not directly through a native integration today, but the workflow is complementary. Use Reonomy to identify a target asset and research its ownership history, then bring the broker OM or your deal assumptions into AcquiOS for underwriting, validation, and output generation.
Reonomy was acquired by Altus Group. Its property intelligence capabilities have been integrated into the Altus platform. If you are evaluating Reonomy today, check what is included in your Altus Group subscription. AcquiOS remains an independent AI underwriting platform focused purely on deal analysis.
AcquiOS generates complete underwriting models from broker OMs, validates assumptions against market data, detects structural conflicts, scores deals with AcquiScore, and produces IC-ready memos and decks in your templates. Reonomy provides property data and ownership records but does not perform underwriting, assumption validation, or model generation.
AcquiOS pulls from its own market data layer, including rental comps, cap rate benchmarks, and market rent databases, to validate broker assumptions in real time. You do not need Reonomy to get assumption validation; AcquiOS has its own independent data sources for the underwriting workflow.
Acquisition teams, underwriters, and analysts who spend significant time building financial models, validating broker assumptions, and preparing IC materials will get the most from AcquiOS. Reonomy serves a broader audience including brokers, lenders, and researchers who need property data. AcquiOS is laser-focused on the buy-side investment analysis workflow.