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The standard in CRE data.

Every comp is processed by a multi-step data verification system, including machine learning algorithms, statistical anomaly detection, and a team of CRE research analysts.

01 · Received
02 · Screened
03 · Verified

Community Sourcing

40,000+ verified CRE professionals at brokerage and appraisal firms submit comps daily. Transaction data is received and reviewed multiple times.

AI & Machine Learning

Machine learning and statistical anomaly detection flag figures outside the expected range for the market and building. CRE Ontology resolves the address to one building and matches every party on the deal to a verified entity. Flagged records are held for review.

Analyst Verification

Our team of CRE research analysts review and verify data daily. They cross-check each transaction against deal participants and property records. Data is never estimated or blindly added to the system.

01 · Received

Broker Appraiser Broker
Verified member Reviewed on intake

Community Sourcing

40,000+ verified CRE professionals at brokerage and appraisal firms submit comps daily. Transaction data is received and reviewed multiple times.

02 · Screened

400 Mandel Street, Gotham, NY Belobrovka Analytics · Office
SizeRentTerm
One building resolved Every party matched
1400 Mandel Industrial PkwyHeld for review

AI & Machine Learning

Machine learning and statistical anomaly detection flag figures outside the expected range for the market and building. CRE Ontology resolves the address to one building and matches every party on the deal to a verified entity. Flagged records are held for review.

03 · Verified

CRE research analystCross-checks the deal against its participants and property record
Analyst reviewed 400 Mandel Street, Gotham, NY Belobrovka Analytics · Office
SizeRentTermNet effective
Deal participants Property record

Analyst Verification

Our team of CRE research analysts review and verify data daily. They cross-check each transaction against deal participants and property records. Data is never estimated or blindly added to the system.

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Extract, resolve, connect.

Each system handles a different part of the verification process. Doc AI reads the document. Entity Resolution AI and Knowledge Graph AI together form CRE Ontology, the system for linking entities and properties.

Lease document → fields
Address → one building
Entities → relationships
EXTRACT

Doc AI

Reads leases, offering memoranda, and other unstructured documents and pulls the transaction details into standardized fields.

RESOLVE

Entity Resolution AI

Resolves an address to a single building, and that building to its property and parcel.

CONNECT

Knowledge Graph AI

Unmasks ownership structures, links tenant entities across leases, and maps broker relationships.

Lease document → fields

LEASE AGREEMENT
Extracted fieldsStandardized

TenantBelobrovka Analytics

Address400 Mandel St, Gotham

LandlordStak Holdings LLC

Use · TermOffice · 10 years

Extract

Doc AI

Reads leases, offering memoranda, and other unstructured documents and pulls the transaction details into standardized fields.

Address → one building

400 Mandel St 400 Mandel Street, Fl 12 400–410 Mandel St.
400 Mandel StreetGotham, NY · Office
Building›Property›Parcel

Resolve

Entity Resolution AI

Resolves an address to a single building, and that building to its property and parcel.

Entities → relationships

Building400 Mandel Street

TenantBelobrovka Analytics

OwnerStak Holdings LLC

Ultimate ownerMandel Capital

BrokerComp Brokerage

Also leases12 Comp Plaza

Connect

Knowledge Graph AI

Unmasks ownership structures, links tenant entities across leases, and maps broker relationships.

The standard, field by field.

Three record types, one field structure each. The highlighted fields are the ones most sources leave out.

400 Mandel Street, Gotham, NY

Office  ·  Lease comp  ·  Submitted 04/2026

Analyst reviewed

Tenant

Belobrovka Analytics

Space type

Office

Starting rent

$88.00 /SF

Execution date

03/2026

Lease term

126 months

Expiration

09/2036

Beyond the starting rent

TI / work value

$120.00 /SF

Free rent

12 months

Transaction type

New lease

Net effective rent

$79.45 /SF

900 Belobrovka Street, Gotham, NY

Office  ·  Sale comp  ·  Submitted 07/2026

Analyst reviewed

Buyer

Stak Capital Partners

Seller

Comp Property Trust

Transaction date

06/2026

Transaction size

412,000 SF

Price

$267,800,000

Price PSF

$650.00 /SF

Beyond the price

Cap rate

5.75%

NOI / NOI PSF

$15,400,000 · $37.38

Opex / Opex PSF

$11,536,000 · $28.00

1250 Stak Avenue, Gotham, NY

Office  ·  Loan  ·  Originated 02/2026

Analyst reviewed

Lender

Belobrovka Bank

Borrower

Mandel Holdings

Loan amount

$175,000,000

Origination date

02/2026

Maturity date

02/2031

Loan type

Fixed rate

Beyond the loan amount

Interest rate

6.25%

Loan to value

58%

Debt service coverage

1.45x

Standard fields for CompStak records. Values are illustrative.

See real comps

Powering stories forCompStak Data In CRE News

AI companies have leased 1 million square feet of San Francisco office space since 2020. But with about 30 percent of existing leases due to expire by the end of 2025, AI alone will not be enough to save the city’s office market, according to a new report from CompStak and Savills.

The Real Deal

CompStak has very accurate information and is able to share specifics on each deal, unlike some other data providers that anonymize and average it. The data they have is so valuable that it might be able to be the basis for a lot of other tools.

Propmodo

CompStak’s more than 35,000 members deliver authenticated data encompassing all of the U.S. for CRE professionals that include appraisers, brokers and investors.

Forbes

“My sense is that the financial services industry remains the backbone of New York’s economy and office market, and will continue to do so,” said Alie Bauman, a CompStak economist. “While FIRE’s totals are down, just as leasing is overall for office space, FIRE is accounting for a higher share of activity than it did historically, and it seems to me that would be a brighter spot if you’re an office landlord.”

Commercial Observer

In Chicago, Workbox filled 29K SF of a former 112K SF WeWork at 125 S. Clark St., according to lease data provided by CompStak.

Bisnow

CompStak’s analysis of office leases signed from 2018 to the first quarter of 2024 in four major U.S. office markets – Manhattan, San Francisco, Los Angeles, and Chicago – found a preference for higher floors, underscoring the often-mentioned post-COVID flight-to-quality trend.

Globe St.

Solutions designed for the way you work.

Access the same verified CompStak data through the experience that fits your team, from contributing and unlocking comps in Exchange to enterprise-grade analytics, AI connector, APIs, and advisory services.

CompStak Exchange

For commercial brokers, appraisers, and researchers

Submit the comps you have to get the comps you need, all for free.

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CompStak Enterprise

For everyone who underwrites, values, and analyzes CRE

Start with the data and AI workflows. Add delivery or advisory when you need them.

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See what verified data looks like in your market.

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