Real estate franchise and brokerage giant Realogy will host an around-the-clock hackathon next month, giving developers a chance to create new software products using data feeds from some of Realogy’s largest brands and six of the largest multiple listing services in the U.S.

Up to 300 developers will be on hand at San Francisco’s Moscone Center for the Nov. 6 event, which coincides with the National Association of Realtors’ annual meeting.

Realogy is partnering with Retsly Software Inc., a real estate software firm that aggregates data from multiple MLSs and makes it useable for developing data-driven real estate products on its platform.

Developers participating in the “Realogy Innovation Summit – Powered by Retsly” will work alone or pair up to create a product from Retsly’s multisourced data feed, competing for the chance to win $2,500 in cash and other best-in-class prizes.

For the competition, Retsly’s platform will aggregate data on more than 2 million listings sourced from proprietary listing databases from Realogy brands Century 21 Real Estate, Better Homes and Gardens Real Estate, Coldwell Banker Real Estate, ERA Real Estate and Sotheby’s International Realty, and large MLSs California Regional MLS (CRMLS), Midwest Real Estate Data (MRED), Sandicor, Connecticut MLS (CMLS), InterMountain MLS and MLSListings.

The event, an extension of Realogy’s first annual “Realogy FWD” Innovation Summit, held in June, is intended “to challenge the most creative software developers to focus their efforts on using big data in the real estate space,” said Alex Perriello, CEO of Realogy Franchise Group, in a statement. “It will be enlightening to see what new applications will be conceived in such a compressed period of time.”

Retsly designed its platform to save developers the headache of having to go from MLS to MLS for listing data, said Joshua Lopour, co-founder of Retsly. Instead, they can go to one location for data — Retsly’s platform — allowing them to focus on innovating.

Joining Perriello as judges at the event will be MRED CEO Russ Bergeron, CRMLS CEO Art Carter, Sandicor CEO Ray Ewing, and CMLS CEO Cameron Payne.

The event will begin at 8 a.m. Nov. 6 and run straight through until the following morning, when developers will begin pitching their new products to the judges. Top finishers will earn space on the floor at the NAR Expo from Nov. 8 – 11.

Developers can sign up for the event here.

Editor’s note: This story has been updated to include sign-up info.

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