What is the best Reonomy alternative in 2026?

It depends on the job. ATTOM is the closest data swap through a documented API and cheaper to start. Regrid wins for land and parcel data, Cherre for unifying many feeds, CompStak for comps, CoStar or Crexi for on-market listings, and PropertyShark for deep records in specific metros. If your real goal is owner outreach at scale, the strongest alternative is building your own data layer with entity resolution and automated outreach rather than renting another seat.

How much does Reonomy cost, and are alternatives cheaper?

Reonomy runs $400 per month or $4,800 per year per user. Several alternatives start lower: ATTOM's API begins around $95 per month, and PropertyShark is often cheaper in its strong markets. But price is not the only axis. Reonomy's LLC-piercing entity resolution is what you pay for, and the cheaper data feeds give you owner-of-record only, so replacing it fully means adding that resolution yourself.

What is the closest ATTOM or Reonomy substitute for developers?

ATTOM is the closest programmatic substitute for Reonomy's data, with 158 million-plus properties and 9,000-plus fields via a documented API. For land and site work specifically, Regrid is sharper, delivering parcel geometry across 150 million-plus parcels and 3,252 counties. Developers often run both, ATTOM for property and deed data, Regrid for parcels, then add entity resolution and outreach on top rather than paying for a full research platform.

Does any alternative do Reonomy's LLC entity resolution?

Reonomy's entity resolution, piercing the LLC to the controlling principal, is its strongest feature and few alternatives match it out of the box. The data feeds like ATTOM and Regrid give you owner-of-record, not the pierced entity. To replicate it you either keep Reonomy for that step or build resolution into a custom system that traces entities through Secretary of State filings and registered-agent records at scale.

Can I replace Reonomy with CoStar or Crexi?

Not really, because they solve a different problem. CoStar and Crexi are strongest on on-market listings, comps, and analytics, while Reonomy's value is off-market ownership and owner contacts. CoStar also has no sanctioned API and prohibits automated access, so you cannot wire it into a sourcing workflow. Treat them as complements for the listed side of your pipeline, not as Reonomy replacements for off-market outreach.

Reonomy Alternatives: 7 CRE Data Options Compared (2026)

Q: When does building a data layer beat paying for Reonomy?

When you source at volume across markets and the data seat is a means to outreach, not the end. A build reads from feeds like ATTOM and Regrid under your own license, does the entity resolution Reonomy charges for, and adds the automated outreach Reonomy never has, running inside systems you control. If you only look up ownership on a few deals a month, keep the subscription; a build is for teams whose bottleneck is coverage.

Start Here

The best Reonomy alternatives in 2026 depend on what you actually use Reonomy for. For raw property and deed data through a documented API, ATTOM and Regrid. For unifying many feeds into one queryable layer, Cherre. For crowdsourced lease comps, CompStak. For on-market listings and comps, CoStar or Crexi. For property records with strong coverage in specific metros, PropertyShark. And if the real job is owner outreach at scale, the honest alternative is not another data seat, it is building your own data layer with an AI deal-sourcing engine on top. Reonomy (an Altus Group company) is strong at ownership and LLC resolution across 53+ million commercial properties at $400/month per user; below is where each alternative genuinely beats it.

Disclosure: NextAutomation builds custom sourcing systems, so we appear here as the build-your-own option. We rank the data platforms on their merits first, and we are clear that for most teams a data subscription is the right answer, not a build.

What Reonomy Does, So You Know What to Replace

Reonomy unifies commercial property records, ownership, transaction history, and verified owner contacts across 53+ million U.S. commercial properties, and its standout feature is entity resolution: piercing the LLC to reach the human who controls the asset (Altus Group). Standard pricing is $400/month or $4,800/year per user (CRE Daily).

That LLC-piercing is why people reach for Reonomy in the first place, and it is not optional in commercial. By 2024, LLCs, LPs, and LLPs held 20.6% of U.S. single-family rentals, up from 15.2% just three years earlier (Harvard Joint Center for Housing Studies), and in commercial the entity layer is close to universal. So the real question goes past who has property data to who resolves the owner behind it and how you plan to reach them. That splits the alternatives into three groups.

Three Kinds of Reonomy Alternative

People shop for a Reonomy alternative for three different reasons, and mixing them up is how you end up with the wrong tool. Sort yourself first:

You want the same data, cheaper or programmatic. Then you are shopping data feeds: ATTOM and Regrid. You trade Reonomy's polished research interface and entity resolution for a raw API you build on, and you save money doing it.
You want a different job entirely. Comps (CompStak), on-market listings (CoStar, Crexi), or metro-deep records (PropertyShark) are not really Reonomy replacements, they are adjacent tools people confuse with it because they all say "commercial real estate data." Match the tool to the question you are actually asking.
You want the outcome, not the data. If you pay for Reonomy to reach owners and close off-market deals, the honest alternative is a system that owns resolution and outreach end to end. Cherre sits here too for firms that need to unify feeds before anything can act on them.

Get that sort right and the shortlist below is obvious. Get it wrong and you buy a comps tool to solve an outreach problem.

Reonomy Alternatives Compared

Alternative	What it replaces	Owner resolution?	Best for
ATTOM	Reonomy's data feed	Owner-of-record, not entity-pierce	Programmatic property + deed data
Regrid	Parcel + boundary layer	Owner-of-record	Land, GIS, parcel geometry
Cherre	The unification layer	Depends on feeds you connect	Data-mature firms with many sources
CompStak	Lease + sale comps	No	Crowdsourced comps
CoStar	Listings + market analytics	Limited, no sanctioned API	Broadest on-market coverage
Crexi	Marketplace + intelligence	Some owner data	On-market deal flow
PropertyShark	Property records	Owner-of-record, metro-strong	Deep records in specific markets
Build your own layer	Reonomy + the outreach it can't do	Yes, entity resolution + enrichment	Owner outreach at volume

The Alternatives, Honestly

1. ATTOM: the data feed underneath

If you like Reonomy's data but want it programmatically, ATTOM is the closest swap. It covers 158+ million residential and commercial properties with 9,000+ data fields and 70+ billion rows through a documented API, from about $95/month at the entry tier (Realie.ai). Where it beats Reonomy: integrator-friendly, cheaper to start, built to be wired into your own tools. Where it does not: ATTOM gives you owner-of-record, not Reonomy's entity-pierced principal, so you supply the LLC resolution yourself or bolt it on. It is a feed, not a finished research product.

2. Regrid: the parcel and land layer

For land and development sourcing, Regrid is the sharper tool. It delivers nationwide parcel geometry across 150+ million parcels and 3,252 counties, with APNs and boundary data Reonomy does not focus on (Realie.ai). Where it beats Reonomy: parcel-level GIS and land coverage. Where it does not: it is a mapping and parcel layer, not an ownership-intelligence platform, so it complements Reonomy more than it replaces it for outreach.

3. Cherre: the unification layer

If your problem is that you already license three or four feeds and none of them agree with each other, Cherre is the answer, not another dataset. It ingests, connects, and standardizes multiple property, ownership, and market feeds into one queryable schema. Where it beats Reonomy: it is a platform for firms running a real data operation, and it can normalize Reonomy alongside everything else. Where it does not: Cherre is infrastructure, so it assumes you have the feeds and the team to run it. For a two-person shop it is overkill.

4. CompStak: the comps specialist

CompStak crowdsources lease and sale comps from brokers and appraisers, which is exactly the data Reonomy is thin on. Where it beats Reonomy: comp depth, especially lease-level detail. Where it does not: it does not do ownership resolution or owner contacts, so it answers what a property is worth, not who to call about it. Pair it with an ownership source rather than swapping.

5. CoStar: the on-market giant

CoStar has the broadest listings, comps, and market analytics in commercial, and it is the default for on-market research. Where it beats Reonomy: coverage and analytics depth on what is listed. Where it does not: there is no sanctioned CoStar API and its terms prohibit automated access, so you cannot wire it into a sourcing workflow, and its on-market focus is the opposite of Reonomy's off-market owner angle. Treat it as works-alongside, not a Reonomy replacement.

6. Crexi: the marketplace

Crexi is a commercial marketplace with a growing intelligence layer, and it is genuinely useful for on-market deal flow and some owner data. Where it beats Reonomy: live listings and an accessible interface. Where it does not: like CoStar, its center of gravity is on-market, so it is a complement for the listed side of your pipeline rather than an off-market owner engine.

7. PropertyShark: the metro specialist

PropertyShark has deep property records with especially strong coverage in specific metros. Where it beats Reonomy: record depth in its strongest markets, often at a lower price point. Where it does not: coverage is uneven nationally and owner resolution is owner-of-record rather than entity-pierced. If you work one strong-coverage market, it is a credible swap; across many markets, it is not. For head-to-heads, see Reonomy vs PropertyShark.

8. Build your own data layer: when outreach is the real job

Here is the alternative none of the data vendors will offer: stop buying seats and build the layer. If what you actually need is not more data but a system that resolves owners behind entities, enriches phone and email, scores properties against your buy box, and runs outreach, then another subscription is the wrong purchase. A custom system reads from feeds like ATTOM and Regrid under your own license, does the entity resolution Reonomy charges for, and adds the automated outreach Reonomy has never done, all on a data layer you own. Our property enrichment workflow is the piece that turns a raw parcel into a reachable owner.

The honest caveat: a build is worth it only when you are sourcing at volume across markets and the data seat is a means, not the end. If you just need to look up ownership on a handful of deals a month, keep Reonomy or take ATTOM. The full picture of how a system strings data, resolution, and outreach together is in our guide to the full off-market sourcing method.

How to Choose Your Reonomy Alternative

Decide by the job. Want the same data programmatically and cheaper? ATTOM. Working land and parcels? Regrid. Drowning in feeds that do not reconcile? Cherre. Need comps? CompStak. Researching what is listed? CoStar or Crexi. Deep in one metro? PropertyShark. And if the reason you pay for Reonomy is to reach owners at scale, the real upgrade is a system that owns the resolution and the outreach, which is where a managed sourcing build earns its keep. For the AI-specific cut of the sourcing stack, our best AI tools for CRE deal sourcing ranks the layers.

If you are weighing whether to keep renting data or build the layer that uses it, that is a scoping conversation, not a sales one. A free roadmap call will sort out which feeds you genuinely need and whether owning the layer beats renting another seat at your volume.