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400 Mandel Street, Gotham, NY
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CompStak Exchange is the free platform for brokers, appraisers, and researchers. Contribute the comps you have to view analyst-verified comps.
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Your comps are the currency.
Exchange runs on a give-to-get model. The comps you contribute pay for the ones you pull.
The Exchange Ecosystem
Every comp that clears analyst review earns credits. Every comp you unlock spends them. Submissions with more details earn more credits.
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1200 Belobrovka Avenue, Gotham, NY
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Any format works. Excel, PDF, a photo of a deal sheet — our analysts extract and structure the data.
First in earns more. The first version of a comp CompStak receives earns the most credits.
Recent deals earn more. Leases signed within the last 60 days and sales closed within the last 12 months carry the highest credit value.
Complete comps earn more. Concessions, lease expiration, cap rate, NOI, and property subtype each raise what a submission is worth.
Spend your credits. Unlock analyst-reviewed lease and sale comps across 105 markets.
Submissions are anonymous. Members see the deal, not who sent it.
40,000+
CRE professionals
4M+
Verified comps
105
Markets
The deal as it actually signed.
Listings show asking rents. Deeds show an LLC. A CompStak comp is the completed transaction, with the negotiated terms included.
Lease comps
What the tenant pays, factoring in concessions.
400 Mandel Street, Gotham, NY
Lease compAsking rent
$105.00 /SF
what the landlord listed
Starting rent
$92.00 /SF
Escalations
2.75% annual
Free rent
18 months
Landlord work
$150.00 /SF
Lease term
132 months
Commencement · Expiration
06/2025 · 05/2036
Net effective rent
what the deal traded at
$79.57 /SF
Illustrative record. Not an actual transaction.
Starting rent, not asking rent
The rent on the signed lease, plus how it escalates.
Free rent and landlord work
The two concessions that change what the tenant actually pays.
Net effective rent
One number for what the tenant pays over the term, with concessions factored in.
Sale comps
Who bought the property, what they paid, and what the income is.
1200 Belobrovka Avenue, Gotham, NY
Sale compRecorded buyer
GOTHAM RIDGE SPE IV LLC
the entity on the deed
Sale price
$217,000,000
Price per SF
$700 /SF
Cap rate
5.4%
NOI
$11,718,000
True Seller
Comp Property Trust
Sale date
04/2025
True Buyer
who actually bought it
Stak Capital Partners
Illustrative record. Not an actual transaction.
Cap rate and NOI
The two numbers that price a sale. Neither is in the public record.
True Buyer / True Seller
Deeds name an LLC. CompStak resolves it to the company behind it, so you know who the buyers and sellers are.
Sale price, even in non-disclosure states
In Texas and other non-disclosure states, the public record never shows a building’s sale price. CompStak sale comps do.
Anonymous, every time.
Members see the deal, not who sent it. Your name and firm are not attached to the comps you submit.
More than comps.
Search, size, and understand the market.
Map polygon search
Draw a boundary and pull every comp inside it.
Market trends and heat maps
Average rents and concessions by submarket, updated daily as new comps come in.
Custom alerts
Get an alert when a new comp lands in a market you cover.
CompStak AI
CompScout
Ask for comps in plain English. CompScout searches the comps you’ve unlocked and the ones you haven’t found yet.
CompStak AI
AI Market Summary
A written read on any market or submarket, with live charts and the recent deals behind it.
CompStak AI
Estimated Starting Rent Today
What a space should rent for today, as a starting rent and a net effective rent, calculated from comparable deals.
Built for brokers, appraisers, and researchers.
Brokers
Back every pitch with actual lease economics.
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Know what the last deal in the building traded at. Starting rent, free rent, landlord work, and term on comparable leases in the building and the submarket.
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Prospect before the listing exists. Lease expirations by submarket, or inside any boundary you draw, show which tenants come to market next.
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Negotiate from real transactions. Net effective rent on comparable deals, so you can show what the market actually paid.
Appraisers
Analyst-reviewed comps with the concessions broken out.
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Make your own adjustments. Starting rent, free rent, landlord work, and term as separate fields, with the net effective rent that results.
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Support the cap rate with the actual NOI. Sale comps with cap rate, NOI, price per square foot, and True Buyer / True Seller.
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Cite a source that holds up under review. Every record analyst-reviewed against independent sources and exportable to Excel or PDF.
Researchers
Market data from closed deals
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Build the averages yourself. Deal-level lease and sale records across 105 markets, each dated, to cut by market, submarket, asset type, or size band.
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Watch a market move as deals close. Market trend averages built from closed deals, plus alerts for the markets you cover.
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Answer the one-off request. CompScout pulls the exact comps from a plain-English question. AI Market Summary turns them into a written market read with live charts and the deals cited.
Trusted by brokers and appraisers at firms you know.
Not a day goes by where CompStak isn’t being utilized by our office. CompStak helps to better service our clients, making our brokers more productive.
Brad Cohen
CBRE
My valuation teams are continually surprised by both the amount and quality of data available on CompStak Exchange in the Chicagoland area.
Brandon Nunnink
Partner Valuation Advisors
CompStak is an extremely valuable resource for valuation professionals due to the reliability of data and ease of use. The excellent Customer service also makes this a company I can get behind.
Brian Spohr
Kennedy Wilson Property Services
Knowledge is power and CompStak consistently delivers the information I need to provide my clients with the most accurate and up-to-date market intelligence available today.
Jon Olmstead
Cresa
Deal Radar
A lead generation platform for the deals you’re working and the ones you haven’t found yet. Built on the same transaction data behind every Exchange comp.
Request early access
Open to Exchange members.
Three checks before a comp reaches you.
Every comp is verified by our research team. A submission is not a CompStak comp until it has cleared every check below.
400 Mandel Street, Gotham, NY
Belobrovka Analytics · Office
SizeRentTerm
400 Mandel Street, Gotham, NY
Belobrovka Analytics · Office
SizeRentTermNet effective
Verified memberReviewed on intake
One building resolvedEvery party matched
1400 Mandel Industrial PkwyHeld for review
Deal participantsProperty record
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Community Sourcing
40,000+ verified CRE professionals at brokerage and appraisal firms submit comps daily. Transaction data is received and reviewed multiple times.
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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.
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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.
Before you join.
The questions brokers, appraisers, and researchers ask before their first submission.
Is CompStak Exchange free?
Yes. Joining is free and there is no subscription. You earn credits by submitting comps and spend them to unlock comps from other members.
Who qualifies to join?
Exchange is for commercial real estate brokers, appraisers, and researchers who work on transactions. Apply with your work email and CompStak confirms you qualify before your account is activated. Owners, lenders, and investors are served by CompStak One.
How do I earn credits?
Submit a lease or sale comp. Once a CompStak analyst reviews and verifies it, credits are added to your account. Recent deals, comps that include concessions or expiration dates, and comps that are new to CompStak earn the most credits.
Is my submission anonymous?
Yes. Your name and firm are not attached to a comp on the CompStak platform. Other members see the transaction details, not the source.
What happens to a comp after I submit it?
A CompStak research analyst reviews it and cross-checks the terms, the parties, and the property against independent sources. Once it clears review, it is added to the CompStak platform and your credits are added.
What information do I need to submit a comp?
The address, the tenant or buyer, the size, and the key economics: starting rent and term for a lease, sale price for a sale. More fields, especially concessions, lease expiration, cap rate, and NOI, earn more credits. Any file format is accepted.
Which markets does Exchange cover?
105 U.S. markets across office, industrial, retail, multifamily, flex, R&D, and land. See coverage in your market →
How is Exchange different from CompStak One and CompStak One Connect?
Exchange is the free, credit-based network for brokers, appraisers, and researchers. CompStak One is the subscription platform for owners, lenders, and investors, with the full dataset, Analytics, and Portfolios and no credits required. CompStak One Connect includes access to Rent Predictor and Agent Connect. Compare →
Are you a CRE lender, owner, or investor? Explore CompStak Enterprise →