Built the buy-side. Then taught it to understand what buyers actually mean.
The nation's largest flat fee brokerage had a sell-side business but no way for buyers to search, discover, or transact. We built the marketplace and a proof-of-concept for AI-powered property search that understands context, not just filters.
Overview
Impact, measured in results
Buy-side marketplace live across all 50 states
Platform ranks among the most visited proptech sites in the US
Among the first NLP-powered property search implementations in US proptech
The nation's largest flat fee MLS brokerage, licensed in all 50 states, operating one of the top 10 most visited proptech sites in the country. Hundreds of homes sold annually through a technology-driven model that cuts traditional agent commissions.
Why AppStream
AppStream didn't just build us a buy-side app. They gave us a search experience that none of our competitors have.
Product Lead
National Flat Fee Brokerage
Build the marketplace. Then make search smarter than anyone else's.
We built a complete buy-side web application from scratch. Mobile-responsive, consumer-grade, handling MLS data from all 50 states. Buyers can search, filter, favorite, and discover properties the way they expect from a Zillow or Compass — but integrated with the client's flat fee model.
Then we wired in the transaction layer. Title and mortgage services integrated directly into the buying experience so a buyer can go from discovering a property to closing on it without leaving the platform. That's full transaction capture — listing through closing — in one product.
On top of that, we built a proof of concept for AI-powered property search. Instead of structured filters, buyers type what they mean: "townhome in Lexington, Kentucky near Whole Foods." The engine parses the intent — property type, location, proximity to a specific amenity — and returns results that match. It's among the first implementations of semantic property search in the US market.
Challenges
Outcomes
Summary
Provided services
Our team
Justin Tannenbaum
Solutions Architect
Lukasz Chmielowski
Lead Engineer
Piotrek Szyperski
Engineering
Ernesto Quispe
Product Design
Tech stack
Build the product your competitors don't have yet
If you're sitting on a market opportunity that needs a new product surface and AI differentiation, we've done this before.
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