SimplyRETS vs Datafiniti Property Data for AI agents
SimplyRETS is a developer API and WordPress plugin that turns your own MLS's RETS or RESO Web API feed into a simple REST listings API. Datafiniti Property Data is a searchable US property database (API, portal and bulk download) that merges listing activity, tax/assessment and transaction data per property.
The short answer
- SimplyRETS: An affordable, simple REST layer for an agent or brokerage that already has its own MLS data feed.
- Datafiniti Property Data: Bulk property and listing-history records for analysis and modelling, billed per record returned.
Side by side
| SimplyRETS | Datafiniti Property Data | |
|---|---|---|
| Searches | Listings from the MLS feeds you connect: active, under contract, pending and closed; residential, condo, rental, multifamily, commercial and land, plus open houses. | Residential, commercial, multi-family and land properties: active listings, historical records, off-market properties, and rental status. |
| Returns | Listing records with property details, photos, and listing agent and office information when the MLS feed supplies it. | Property records with location, characteristics, tax/assessment data, transaction history, prices, rental status, brokers (agent, phones, emails) and source URLs. |
| Before the first call | RETS or RESO Web API credentials from your MLS; whether you must be an agent or broker depends on the MLS. | A Datafiniti account (trial or paid plan) and its API token. |
| Free | Free demo API keys with sample data; no free trial with live data. | Trial: 1,000 property records free for 2 weeks. |
| Paid | Basic plan $49 a month, plus a one-time $99 fee per MLS connection. | $119 a month for 1,000 property records a month. |
| Acting on a result | Listing agent and office contact details come with each listing when the MLS feed has them, and some MLSs require showing them. | Records can include broker and agent names with phone numbers and emails, plus source URLs of the listing pages. |
| Limits on keeping or showing results | Only listings flagged for IDX display are served, and you must follow the display rules (e.g. last-updated disclaimers) set by your MLS. | No reselling or redistributing the data without significant modification, no public display of image URLs, and delete all data when the agreement ends. |
| Coverage | Whatever MLS you connect (US); no fixed national coverage. | US |
| MCP server | No official server listed | No official server listed |
Where Openpath fits
Openpath has no homes listed yet. Owners and landlords can list a home for rent or sale on Openpath today, free, and agents will find it through the same search as jobs and businesses. Get listed.
Questions people ask
What do I need before I can use SimplyRETS?
RETS or RESO Web API credentials from your MLS; whether you must be an agent or broker depends on the MLS.
Is SimplyRETS free?
Free demo API keys with sample data; no free trial with live data.
What do I need before I can use Datafiniti Property Data?
A Datafiniti account (trial or paid plan) and its API token.
Is Datafiniti Property Data free?
Trial: 1,000 property records free for 2 weeks.
Sources
Every line about another company comes from its own pages. Prices and terms change, so check the source before you rely on one.
SimplyRETS, read on October 15, 2026:
- simplyrets.com: “These are our demo API keys, you can use them!”
- simplyrets.com: “Each RETS or RESO Web API connection requires one time $99 connection fee.”
- simplyrets.com: “Get RETS or RESO Web API credentials from your MLS”
- simplyrets.com/faq: “This is dependent on the MLS area you want to connect to.”
- docs.simplyrets.com/topics/fields-and-features-for-idx-compliance: “In some cases it may be required that you show the contact information for the listing agent and/or listing office.”
- docs.simplyrets.com/topics/fields-and-features-for-idx-compliance: “in many areas it’s required to show the timestamp of when the data was last updated in a disclaimer.”
- simplyrets.com: “Basic $ 49 /mo”
- simplyrets.com/faq: “We don't currently offer a free trial period with live data”
Datafiniti Property Data, read on October 15, 2026:
- datafiniti.co/data/property-data: “1K free property records ... for 2 weeks”
- datafiniti.co/data/property-data: “1K property records per month ... $119 per month”
- datafiniti.co/data/property-data: “Datafiniti covers residential, commercial, multi-family, land, and specialty property types throughout the U.S.”
- datafiniti.co/data/property-data: “Explore active listings, historical records, off-market properties, and inventory with no current listing activity.”
- docs.datafiniti.co/docs/property-data-schema: “A list of email addresses associated with the broker.”
- docs.datafiniti.co/docs/property-data-schema: “A list of source URLs associated with this property record.”
- datafiniti.co/terms: “Resell, redistribute or sublicensing Datafiniti Data without any significant modifications”
- datafiniti.co/terms: “you shall immediately delete all Datafiniti Data from your systems”