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RESO Fact Sheet


Name: Real Estate Standards Organization (RESO)

CEO: Sam DeBord | BIO

Mailing Address: PO Box 10824, Raleigh, NC 27605

Phone: 919.504.9898


Mission: To create and promote the adoption and utilization of standards that drive efficiency throughout the real estate industry.



RESO provides the foundation for streamlined real estate technology through the creation and certification of standards. Our member organizations include MLSs, brokerages, REALTOR® associations and technology partners serving more than one million real estate professionals. RESO’s Data Dictionary and Web API are the preeminent real estate industry standards for data structure and transport.

RESO creates open standards that drive innovation in real estate technology. RESO’s member organizations collaboratively develop and implement these standards to create efficiency: faster software development and integrations, scalable tools that cross marketplaces, and more accurate, robust and informative data.



In 1999, the National Association of REALTORS® (NAR) joined forces with leaders in technology to explore ways to make access to MLS data easier for real estate brokers, agents and their technology partners.

In 2002, NAR created an official workgroup, which would eventually become RESO. This workgroup created the first version of the well-documented Real Estate Transaction Standard (RETS).

RESO was incorporated in November 2011 as an independent, not-for-profit trade organization. Soon after, it released the industry’s Data Dictionary, followed by the RESO Web API, which replaced RETS. Over 500 MLSs have been certified on these standards.

Since 2020, RESO standards implementations have expanded outside of the U.S., including MLSs and technology companies across the Americas, Europe, West Asia and Australia.


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