MLS vs Zillow
MLS is the cooperative database agents use to share listings, cooperate on commissions, and verify property data. Zillow is a consumer-facing portal that pulls listings, adds estimates, and sells leads back to agents. They look similar — they are not the same product.
Brokers and agents
MLS data source
MLS feed + user input
Zillow data source
MLS
Most accurate
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The MLS (Multiple Listing Service) is a cooperative database that brokerages contribute to, regulate, and use to share listings with each other. Zillow is a public website owned by Zillow Group that pulls listings from MLS feeds, adds its own estimates and ads, and sells advertising and leads back to agents.
MLS data is entered by the listing agent under broker compliance rules and refreshed continuously. Zillow listings come from MLS feeds (with a delay) plus user-submitted FSBO and off-market data, which is why prices, status, and details on Zillow can lag or drift from what the MLS shows.
Only licensed real estate agents and brokers can list a property on the MLS, and only after agreeing to fair-housing, disclosure, and accuracy rules. Anyone can post a 'Make Me Move' or FSBO listing on Zillow — that's part of why the two sites diverge.
How A Listing Flows
Step 1
The listing agent uploads photos, remarks, price, terms, and disclosures to the MLS under brokerage compliance rules.
Step 2
Within minutes to hours, Zillow ingests the listing from the MLS feed, layers on a Zestimate, ads, and lead-capture forms, then surfaces it to consumers.
Step 3
Buyers browse Zillow. Agents work the MLS for status updates, broker remarks, showing instructions, and offer history. The portal a buyer sees is rarely the full picture an agent sees.
Who Cares About The Difference
Listing on the MLS through a licensed agent gets the property onto Zillow automatically. The reverse is not true — a Zillow FSBO post does not put the listing on the MLS.
Zillow is the easier consumer interface. The MLS data agents see is more current and more detailed, which is why prices and statuses sometimes look different on the two sites.
MLS remarks have character limits and compliance rules. Zillow displays the same remarks but is read by a much less technical audience, so the same copy has to work for two very different readers.
Side-By-Side
Zillow view
Photos, Zestimate, price history, school ratings, mortgage tools, lead-capture form. Status may lag the MLS by hours or days.
MLS view
Same listing plus broker remarks, showing instructions, status changes, offer history, supra/lockbox info, commission terms, and disclosures. Updated in real time.
Zillow is the marketing channel. The MLS is the working file. Agents do their real listing work in the MLS and then check Zillow to see how the public version reads.
Real Discrepancies
Price discrepancy example
A listing goes from active to pending on the MLS at 4pm. Zillow may still show it as active until the next feed refresh — sometimes hours later. Always verify status on the MLS.
Off-market difference example
Zillow shows 'Make Me Move' and FSBO entries that the MLS does not. These are not real listings in the MLS sense — no broker, no cooperation, no MLS compliance.
Zestimate vs. CMA example
Zestimate is a statistical model. A broker CMA uses live comps, condition, and local market knowledge. The two will disagree, sometimes significantly — the CMA wins.
Best Practices
Treat the MLS as the source of truth. Anything that conflicts with the MLS — including Zillow — is wrong by default.
Write MLS remarks that hold up on Zillow, because that is where most buyers will read them first.
Claim your Zillow listing and check the Zestimate, status, and photos within 24 hours of going live to catch feed errors.
Next
Write cleaner listing remarks, property descriptions, and broker-ready MLS copy from one listing brief.
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MLS vs Zillow FAQ
No. The MLS is a broker-run database that licensed agents use to list, share, and cooperate on properties. Zillow is a consumer website that pulls MLS data, layers on its own estimates and ads, and sells leads back to agents.
The MLS. It is updated by the listing agent in real time under brokerage compliance rules. Zillow refreshes from MLS feeds on a delay and also includes non-MLS user submissions, which is why prices and statuses can lag or differ.
Generally no. The MLS is only open to licensed brokers and agents who pay dues and follow MLS rules. Flat-fee MLS services can post your listing through a participating broker, but you cannot post directly as a private seller.
Zillow pulls from MLS feeds with a delay, and sometimes layers user-submitted data on top. If the MLS and Zillow disagree, the MLS is the source of truth — ask your agent for the live MLS data.
Most do. Zillow has direct feeds from most MLSs in the U.S. It also includes 'Make Me Move,' FSBO, and other non-MLS listings that did not come through an agent.
Both, but for different reasons. The MLS is where buyer agents find your listing and where the legal data lives. Zillow is where most consumers see it first. Strong MLS remarks will carry to Zillow automatically — the reverse is not true.
No. The Zestimate is a statistical model that uses public data. A real valuation — a broker CMA or licensed appraisal — uses current comps, condition, and local context, and is the figure used in real transactions.
MLSGPT generates listing copy that holds up on the MLS and reads cleanly on the consumer-facing portals it feeds.
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