What is the main difference between CoStar and Crexi?

CoStar is a comprehensive CRE data and analytics platform — its strength is the depth and history of its dataset (property records, tenant rosters, sale and lease comps, ownership, and analyst research), which makes it the standard for defensible comps and underwriting context. Crexi is a live transaction marketplace first — brokers actively list deals there, so its strength is surfacing on-market opportunities and connecting you to listing brokers, with a growing data layer (Crexi Intelligence) for comps and ownership. In short: CoStar wins on data depth and defensibility; Crexi wins on live deal flow and accessibility.

Which has better data, CoStar or Crexi?

CoStar has the deeper and broader dataset overall, with the longest history and the strongest coverage of lease comps and tenant data — it's the industry's most comprehensive data platform. Crexi Intelligence has closed much of the gap on sales comps and ownership data and is improving quickly, but CoStar remains ahead on breadth, history, and lease-level detail. If defending a comp set to your IC or lender is the goal, CoStar is the more authoritative source.

Is Crexi cheaper than CoStar?

Yes, substantially. CoStar is a premium annual subscription priced per seat and is among the most expensive tools in a CRE tech stack. Crexi offers a freemium marketplace — you can browse live listings at no cost — with paid Intelligence and PRO tiers that sit well below CoStar's pricing. We don't quote specific numbers because both vendors negotiate by market, seat count, and product mix, and published figures go stale quickly. For a budget-constrained team whose primary need is live deal flow, Crexi delivers most of the sourcing value for a fraction of the cost.

Should I use CoStar or Crexi for comps?

For defensible sales and lease comps — the kind you'll put in front of an investment committee or a lender — CoStar is the stronger choice thanks to its dataset depth and history, especially for lease comps and tenant data. Crexi's comp data via Crexi Intelligence is genuinely useful and improving, and it's a sensible option for budget-conscious teams or as a sanity check, but CoStar remains the more authoritative source for institutional underwriting.

Does CoStar have an API?

No. CoStar has no sanctioned public API, and its terms of service prohibit automated or programmatic access to its data — a position it has actively litigated and enforced. Any tool that claims to 'integrate with CoStar,' scrape it, or pipe its data into another system is misrepresenting what is technically and legally permissible. The compliant approach is works-alongside: your team accesses CoStar under your own license, exports what you're entitled to, and automation tools operate alongside those exports rather than against the platform.

Does Crexi offer an API for automation?

Crexi provides partner and data API access to licensed customers, which makes programmatic deal-alert and comp workflows possible within Crexi's terms. That's a real advantage over CoStar for firms that want to wire sourcing into their own systems. It is still customer-licensed access rather than open redistribution, so any automation must be built on your own licensed access — not on a third party reselling Crexi's data.

Can I just use Crexi instead of CoStar?

It depends on your bottleneck. If your primary pain is finding deals and your budget is constrained, Crexi covers most of the sourcing job at a fraction of CoStar's cost. If your pain is defending comps and underwriting to institutional capital partners or lenders, CoStar's data depth is hard to replace. Many active acquisitions teams run both — Crexi for live sourcing and broker contact, CoStar for comps and underwriting context — and accept the cost of running both for the jobs each does best.

How does AI deal sourcing work with CoStar and Crexi?

An AI deal-sourcing agent monitors your licensed sources in parallel — new Crexi listings, broker emails, and off-market public signals like permit filings and deed recordings — and scores every opportunity against your acquisition criteria so matched deals surface first. It also reads inbound offering memorandums and applies your screen before an analyst opens them. Critically, it works alongside your CoStar exports and your Crexi access rather than touching CoStar programmatically, which keeps the workflow compliant with CoStar's terms. The automation makes the 'CoStar or Crexi' question matter less, because the watching, scoring, and screening happen automatically across every source you license.

CoStar vs Crexi: Where CRE Investors Actually Source & Comp Deals (2026)

Almost every CRE acquisitions team eventually argues about the same line item: do we pay for CoStar, lean on Crexi, or run both? It's a real budget decision — CoStar is a five-figure annual commitment per seat in many markets, and Crexi sells a far cheaper (sometimes free) on-ramp to live for-sale inventory. But the better question isn't price. It's which tool actually surfaces the deals you can win and the comps you can defend, given where you sit in the deal lifecycle.

This is a focused two-way comparison — CoStar vs. Crexi — for investors and acquisitions teams deciding where to source and comp. If you want the broader marketplace picture including LoopNet, see our 3-way breakdown: CoStar vs Crexi vs LoopNet. Here we go deep on the two tools most firms genuinely weigh against each other.

One disclosure up front: NextAutomation is not CoStar or Crexi, and we're not trying to sell you a replacement for either. We build the AI automation layer that sits on top of whichever data sources you license. So this comparison is objective first — we'll name a real winner for each use-case, and most of those winners are not us.

CoStar vs Crexi at a Glance

Dimension	CoStar	Crexi
Core identity	Comprehensive CRE data & analytics platform	Live transaction marketplace + growing data layer
Data depth	Deepest in the industry — properties, tenants, sales & lease comps, owners, research	Strong and improving — for-sale listings, sales comps, ownership data via Crexi Intelligence
Best for	Defensible comps, market research, underwriting context	Surfacing live on-market deals and broker contact
Pricing posture	Premium annual subscription, per-seat; among the most expensive tools in CRE	Freemium marketplace; paid Intelligence/PRO tiers far below CoStar
API / programmatic access	No sanctioned public API; ToS prohibits automated/programmatic access	Some partner/data API access for licensed customers
Integration tier	Works-alongside only (export under your license)	Customer-licensed / partner-gated
Where it fits	Screening, comping, underwriting context, IC defense	Top-of-funnel sourcing, deal alerts, broker outreach

The short version: CoStar wins on data breadth and defensible comps; Crexi wins on live deal flow, accessibility, and cost. Most institutional buyers eventually run both — CoStar to underwrite and defend, Crexi to source and stay current on what's actually trading. The interesting decision is for the firm that can only justify one.

How to Decide: The Three Criteria That Actually Matter

Skip the feature checklists. For sourcing and comps, your decision comes down to three things.

1. Data depth vs. live deal flow

CoStar is a data company first. Its value is the breadth and history of the dataset: property records, tenant rosters, sale and lease comps, ownership, and research analysts producing market reports. If your bottleneck is "can I defend this comp to my IC or my lender," CoStar is the deeper well. Crexi is a marketplace first. Its value is that brokers actively list deals there, so it shows you what's genuinely on the market right now — with the listing broker one click away. Crexi Intelligence has closed a lot of the data gap on sales comps and ownership, but CoStar's depth and historical coverage remain ahead, especially in lease comps and tenant data.

2. Cost vs. coverage

This is where the gap is starkest. CoStar is a premium annual subscription priced per seat, and in major markets it is one of the most expensive line items in a CRE tech stack. Crexi offers a freemium marketplace — you can browse live listings at no cost — with paid Intelligence and PRO tiers that sit well below CoStar's pricing. We won't quote specific numbers because both vendors negotiate by market, seat count, and product mix, and published figures go stale fast. The honest framing: if budget is the constraint and your primary need is live deal flow, Crexi delivers most of the sourcing value at a fraction of the cost.

3. Marketplace vs. analytics workflow

Ask what your team does after they open the tool. If they're building a comp set, pulling a market report, or stress-testing a rent assumption, that's an analytics workflow — CoStar's home turf. If they're scanning new listings, setting deal alerts, and reaching out to listing brokers, that's a marketplace workflow — Crexi's home turf. Many teams discover they were paying premium analytics prices to do marketplace work, or trying to defend an IC memo on marketplace data. Match the tool to the workflow.

The Honest Head-to-Head: Who Wins Each Use-Case

Use-case	Winner	Why
Defensible sales & lease comps	CoStar	Deepest comp dataset with the longest history; lease comps and tenant data especially
Live on-market deal flow	Crexi	Active broker listings, direct broker contact, freemium access to inventory
Market research & analytics	CoStar	Analyst-produced market reports, forecasts, and the broadest property dataset
Budget-constrained sourcing	Crexi	Most of the sourcing value at a fraction of CoStar's cost
Programmatic / API access	Crexi	Some partner/data API for licensed customers; CoStar has no sanctioned API
Broker relationship workflow	Crexi	Listing broker is one click away; built around the transaction
Institutional underwriting context	CoStar	The data lenders and institutional partners most often expect to see

If you can only buy one and you're a smaller or mid-market buyer whose pain is finding deals: Crexi. If you're an institutional shop whose pain is defending comps and underwriting to capital partners: CoStar. The most common honest answer for active acquisitions teams is "both, used for different jobs" — and that's exactly where the data-silo problem begins.

A Compliance Note You Can't Skip

There's a real difference in what you're allowed to do with each tool's data, and it shapes any automation strategy.

CoStar is works-alongside only. CoStar has no sanctioned public API, and its terms of service prohibit automated or programmatic access to its data — a position it has actively litigated and enforced. Any product claiming to "integrate with CoStar," scrape it, or pipe its data into another system is misrepresenting what's technically and legally permissible. The compliant pattern is simple: your team accesses CoStar under your own license, exports what you're entitled to, and automation tools work alongside those exports — never against the platform. We state this plainly because it's the single most misrepresented integration in CRE software.

Crexi offers some sanctioned access. Crexi provides partner and data API access to licensed customers, which makes programmatic deal-alert and comp workflows possible within Crexi's terms. That's a genuine advantage for any firm that wants to wire sourcing into its own systems — but it's still customer-licensed, not open redistribution. You build on your own licensed access, not on someone reselling Crexi's data.

Where AI Changes the Answer

Here's the reframe most teams miss: the CoStar-vs-Crexi debate assumes a human sitting in one platform at a time. But the deals you win are often the ones you see first, and no analyst can watch every new Crexi listing, every CoStar market shift, and every broker email at once. That's an automation problem, not a subscription problem.

An AI deal-sourcing engine monitors your licensed sources in parallel — new on-market listings, broker blasts, and the off-market signals neither platform covers — and scores every opportunity against your acquisition box (asset class, size, market, return profile) so the matched deals surface first. When a broker emails an offering memorandum, the same layer reads the OM, extracts the key terms, and tells you whether it clears your screen before an analyst opens it. The agent works alongside your CoStar exports and your Crexi access; it never touches CoStar programmatically, because it doesn't need to.

The bigger unlock is the deals that live on neither platform. Most real off-market flow shows up as public signals — permit filings, deed recordings, assessed-value changes, ownership tenure — long before a broker lists it. An off-market deal-sourcing agent monitors those signals continuously and surfaces owners likely to transact, turning your CoStar/Crexi subscriptions into one input among several rather than the whole funnel.

So the AI-era answer to "CoStar or Crexi" is: keep whichever you're licensed for, and stop relying on a person to be the integration between them. The automation layer makes the source-of-record question matter less, because the watching, scoring, and screening happens automatically across all of them. For the full landscape of sourcing tools, see Best CRE deal-sourcing software.

Lifecycle Fit: Where Each Tool Earns Its Keep

Sourcing: Crexi leads — live broker listings, deal alerts, and direct broker contact. An AI sourcing agent extends this to off-market signals neither platform covers.
Screening: Both contribute — Crexi for the deal terms, CoStar for the market context to gut-check whether it's worth underwriting. OM intake automation reads the package and applies your screen automatically.
Underwriting: CoStar leads — comps, tenant data, and market research feed the rent and exit assumptions. Pair with an automation layer that pre-populates models from the export data.
IC & diligence: CoStar leads — defensible comps and market reports are what your committee and lenders expect to see in the memo.
Asset management & disposition: CoStar for ongoing market and lease-comp tracking; Crexi when it's time to list and reach the buyer pool.

The pattern is consistent: Crexi owns the top of the funnel and the exit, CoStar owns the middle where you defend your numbers. Automation owns the connective tissue between them.

The Bottom Line

CoStar and Crexi aren't really the same product. CoStar is the deepest data and analytics platform in CRE, premium-priced, works-alongside only, and the right answer when defensible comps and underwriting context are your bottleneck. Crexi is a live marketplace with a fast-improving data layer, far more accessible on price, with some sanctioned API access, and the right answer when finding deals is your bottleneck. If you can afford both, run them for the jobs each does best. If you can afford one, let your actual bottleneck — sourcing or comping — decide.

Either way, the highest-leverage move isn't switching tools — it's putting an automation layer on top so the watching, scoring, and screening across every source you license happens automatically. To see how these tools fit the full CRE stack, read The Complete CRE Software Stack, and explore the platforms directly: CoStar and Crexi. If you'd like to map where automation gives your firm the fastest payback on the data you already pay for, our free roadmap call is the place to start.