CoStar vs Crexi vs LoopNet: CRE Marketplace & Listing Coverage Compared (2026)

If you run CRE acquisitions, the listing-coverage question shows up constantly: where do deals actually surface — CoStar, Crexi, or LoopNet? It feels like three competing marketplaces, but it isn't. One fact reshapes the whole comparison: LoopNet is owned by CoStar Group. CoStar acquired it years ago, and LoopNet runs on CoStar's data backbone as the public-facing marketplace. So you're really comparing two companies — CoStar Group (with its analytics platform and its LoopNet front door) and Crexi, the independent challenger — across three different products with three different jobs.

This is the three-way, marketplace-coverage view for acquisitions teams deciding where to find and list deals. If you only care about the two platforms most firms weigh head-to-head for sourcing and comps, read our focused two-way: CoStar vs Crexi. This piece adds LoopNet and answers the broader question: which of the three actually surfaces the deals you can win?

One disclosure first: NextAutomation is not CoStar, Crexi, or LoopNet, and we're not selling a replacement for any of them. We build the AI automation layer that sits on top of whichever sources you license. So this is objective first — we name a real winner per use-case, and most of those winners are not us.

Three Products, Two Companies, One Backbone

Before the comparison, get the relationships straight, because they determine everything downstream:

• CoStar is the deep CRE data and analytics platform — property records, sale and lease comps, tenant rosters, ownership, and analyst research. It's the paid professional product behind the scenes.
• LoopNet is CoStar Group's public-facing marketplace. It is free to browse, gets enormous buyer-and-tenant traffic, and draws on CoStar's data backbone. It is the widest shop window in CRE — but it's a CoStar Group property, not a separate competitor.
• Crexi is the independent marketplace + tools challenger — an active for-sale and for-lease marketplace with a growing data layer (Crexi Intelligence) and broker-facing deal management. It is the genuine alternative to the CoStar/LoopNet axis.

So the honest framing isn't "three marketplaces." It's: CoStar Group owns both the deepest analytics platform and the broadest public listing site (LoopNet), while Crexi is the one truly independent marketplace with its own data and tooling. Where your deals surface depends on which of those three jobs — analytics, broad exposure, or active marketplace + tools — matches your bottleneck.

CoStar vs Crexi vs LoopNet at a Glance

The short version: CoStar wins on data depth and defensible comps; Crexi wins on active marketplace, broker tools, and accessible pricing; LoopNet wins on raw public listing exposure. But because LoopNet and CoStar are the same company sharing a backbone, the real strategic choice for most buyers is between the CoStar Group ecosystem and Crexi — and active acquisitions teams almost always watch more than one.

How to Decide: Three Criteria for Marketplace Coverage

For a coverage decision, skip the feature lists. It comes down to three trade-offs.

1. Data depth vs. marketplace reach vs. free exposure

These three products optimize for three different things. CoStar optimizes for data depth — the breadth and history you need to defend a comp or underwrite an asset. Crexi optimizes for marketplace reach with tooling — active broker listings plus the analytics and deal-management tools brokers actually use to run a sale. LoopNet optimizes for free public exposure — it is where the widest, least-specialized buyer pool browses, which makes it the broadest net for what's publicly on-market. Decide which of those three your funnel is actually short on; that's your tie-breaker.

2. Where you sit: buyer-side sourcing or seller-side exposure

If you're a buyer hunting deals, your question is "which surface shows me the most relevant on-market inventory first?" — and that points to monitoring both Crexi and LoopNet, with CoStar for the context to judge them. If you're a seller or broker deciding where to list, the question flips to "which surface puts my deal in front of the right pool?" — LoopNet for the widest public visibility, Crexi for an active, more CRE-specialized buyer pool with performance analytics. The same three tools answer different questions depending on which side of the table you're on.

3. Cost vs. coverage

This is where the gap is widest. CoStar is a premium annual per-seat subscription and among the most expensive line items in a CRE stack. Crexi is freemium with paid Intelligence/PRO tiers well below CoStar. LoopNet is free to browse — the paid product is on the seller side (listing and premium ad placements). So a buyer can get broad on-market coverage from LoopNet and Crexi at little to no cost, and reserve CoStar's spend for the comping and underwriting depth that actually requires it. We don't quote specific prices — all three negotiate by market, seat, and product mix, and published numbers go stale fast.

The Honest Three-Way: Who Wins Each Use-Case

There's no single overall winner — that's the honest answer for a three-way. For buyer-side coverage: watch LoopNet (widest public net) and Crexi (active, specialized marketplace), and keep CoStar for the comping and context that justify a deal. For seller-side exposure: LoopNet for sheer reach, Crexi for an engaged CRE pool with analytics. The most common real-world setup for an active acquisitions team is monitoring at least LoopNet and Crexi, with CoStar licensed for underwriting — and that multi-surface reality is exactly where the manual-monitoring problem begins.

A Compliance Note You Can't Skip

What you're permitted to do with each surface's data differs, and it shapes any automation strategy.

CoStar — and LoopNet — are works-alongside only. CoStar has no sanctioned public API, and its terms of service prohibit automated or programmatic access to its data — a position CoStar Group has actively litigated and enforced. Because LoopNet is a CoStar Group property running on the same backbone, the same ToS posture applies to it: no sanctioned API, no scraping. Any product claiming to "integrate with CoStar" or "pull LoopNet listings" programmatically is misrepresenting what's technically and legally permissible. The compliant pattern is simple: your team accesses CoStar and LoopNet under your own license, exports or reviews what you're entitled to, and automation tools work alongside that — never against the platforms. We state this plainly because it's the 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 over the CoStar/LoopNet axis for firms that want to wire sourcing into their own systems — but it's still customer-licensed access, not open redistribution. You build on your own licensed access, not on a third party reselling Crexi's data.

Where AI Changes the Answer

Here's the reframe the three-way debate misses: it assumes a human watching one surface at a time. But the deals you win are usually the ones you see first — and no analyst can simultaneously watch every new LoopNet listing, every new Crexi deal, every CoStar market shift, and every broker email. That's an automation problem, not a subscription problem. And because the listings on these surfaces overlap, refresh constantly, and arrive from brokers by email at the same time, the real bottleneck is coverage across all of them at once.

A cross-marketplace AI deal-sourcing engine watches every source you're licensed for in parallel — new on-market listings, broker blasts, and the off-market signals none of the three covers — then scores each opportunity against your acquisition box (asset class, size, market, return profile) so matched deals surface first and the duplicates collapse into one. 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/LoopNet access and your Crexi access; it never touches CoStar or LoopNet programmatically, because it doesn't need to.

The bigger unlock is the deals that live on none of the three. Most real off-market flow shows up as public signals — permit filings, deed recordings, assessed-value changes, ownership tenure — long before anything lists on LoopNet or Crexi. An off-market deal-sourcing agent monitors those signals continuously and surfaces owners likely to transact, turning your marketplace subscriptions into a few inputs among several rather than the whole funnel.

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

Lifecycle Fit: Where Each Surface Earns Its Keep

• Sourcing: LoopNet for the widest public net, Crexi for the active CRE marketplace and broker contact. A cross-marketplace AI sourcing agent watches both at once and extends coverage to the off-market signals none of the three surfaces.
• Screening: All three contribute — the marketplaces 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 research feed the rent and exit assumptions. Pair with an automation layer that pre-populates models from your 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; LoopNet and Crexi when it's time to list and reach the buyer pool — LoopNet for reach, Crexi for a specialized pool with performance analytics.

The pattern is consistent: the marketplaces own the top of the funnel and the exit, CoStar owns the middle where you defend your numbers, and automation owns the connective tissue across all three.

The Bottom Line

These aren't three equal competitors. CoStar Group owns both the deepest analytics platform (CoStar) and the broadest public listing site (LoopNet, on the same data backbone), while Crexi is the one independent marketplace with its own data and broker tools. For listing coverage, name the winners by job: LoopNet for the widest public exposure, Crexi for an active marketplace with tools and a specialized pool, and CoStar for the data depth that makes a deal defensible. Most active buyers watch at least LoopNet and Crexi and license CoStar for underwriting — because no one surface covers the whole market.

And remember the compliance line: CoStar and LoopNet are works-alongside only — no sanctioned API, no scraping (the same CoStar ToS covers both). Crexi offers some sanctioned, customer-licensed API access. The highest-leverage move isn't picking one surface — it's putting an automation layer on top so the watching, scoring, and screening across every source you license (plus the off-market signals beyond them) happens automatically. To see how these fit the full stack, read The Complete CRE Software Stack; for the focused two-way, read CoStar vs Crexi; and explore the platforms directly: CoStar (which owns LoopNet) 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.