Access comprehensive MLS data, property records, and location intelligence through a single, compliant platform while cutting data costs by up to 40%
The Data Partner Built for Your Success

Every Layer of Real Estate Data
Access 4M+ active listings from all prominent MLS sources, 160M+ property records, 278M+ verified addresses including 89M+ secondary addresses and Location Intelligence through a single, reliable data infrastructure.

Established MLS
Relationships
We maintain relationships with all prominent MLS organizations, allowing for faster onboarding compared to establishing new relationships from scratch.

Part of Constellation Software Inc.
Part of Constellation Software, a publicly-traded company with over $10B annual revenue, providing financial stability and long-term sustainability.

Compliance Management
We facilitate MLS licensing compliance, RESO standards adherence, and regulatory requirements including documentation and audit trails.

One Partner. Every Data Layer.
Work with a single team for MLS feeds, tax records, parcel data, addresses, geocoding, and ownership information instead of managing multiple vendors.

Transparent, Predictable Pricing
Requirement based flat pricing models aligned to your needs. No surprise escalations. Build accurate financial models with pricing that scales linearly.

Reduced Implementation Time
Most customers are production-ready within days rather than the typical 3-6 weeks timeline for traditional vendor integrations.

Dedicated
Support
Work directly with solutions architects and data specialists throughout onboarding and ongoing operations.
Built on Trust. Backed by Results
From national brokerages to innovative proptech platforms, our clients trust Constellation Data Labs to deliver the data infrastructure that powers their growth
We've worked with multiple data vendors in the mortgage space. What makes Constellation Data Labs stand out is the collaboration—they're transparent about their data, flexible as our requirements have evolved, and available when something needs to get resolved. That's not a given in this industry, and it's the kind of working relationship that makes building a better product possible.
Dale Larson
CEO at Modex
CEO at Modex
Our partnership with Constellation, particularly following the transition, has resulted in meaningful improvements in both the breadth of our data and the quality of our customer experience.
A key driver of this progress has been Constellation's transition to a new customer service and support model. Since that shift, we have seen clear improvements in responsiveness, communication, and overall execution, enabling us to move more efficiently across multiple initiatives. The impact of these changes has been significant and played an important role in shifting our renewal discussions toward an intent to renew.
Nora and Mohtashim have been central to the success of this relationship. Their professionalism, consistency, and proactive approach have helped streamline onboarding efforts, accelerate issue resolution, and maintain strong alignment throughout. We value the partnership and appreciate the continued focus on service and execution as we scale together.
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Lia Adams
Director of Product and Customer Experience at Quantarium
Director of Product and Customer Experience at Quantarium
I can’t say enough great things about Constellation Data Labs. From the very beginning, their approach has been hands-on. They really take the time to make sure everything is set up exactly the way you want it.
They have specialists across the board, from technical to compliance, so you always feel supported no matter what comes up. Overall customer experience has been top notch.
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Dakoda Collins
COO at REAL Marketing Inc
COO at REAL Marketing Inc
Constellation Data Labs has drastically simplified our MLS integrations. We've had direct RETS feeds and partner integrations in the past that would take weeks and multiple engineers to build out to ensure normalized data and consistency.
Data Labs does all of that heavy lifting for us now; it only takes one engineer a few minutes of configuration. Their support team is also highly responsive and genuinely acts on feedback. I'd recommend them to any team that wants to stop spending engineering time on MLS plumbing and focus on building products instead.
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Jesse Zhang
Director of Engineering at Orchard
Director of Engineering at Orchard
Before partnering with Constellation Data Labs, managing multiple MLS feeds, homogenizing the data, and keeping up with syndication updates was an enormous operational burden. CDL changed that entirely. Their robust, reliable APIs give us nationwide MLS access and the ability to process significant volumes of data in real time — something that simply wasn't feasible before. Beyond the technology, the partnership itself has been outstanding. Their ecosystem is dependable, their support team is highly responsive, and our contact, AJ, has been a genuine pleasure to work with. Constellation Data Labs has become a foundational piece of how we deliver value to our subscribers
Steven Cortez
CEO, President at ArchAgent
CEO, President at ArchAgent
CDL has been extremely helpful in getting our MLS feeds in order as we prepare to launch this October. We are excited to continue working with a partner who seems to anticipate challenges before we do. Katerina Servello has been especially terrific. I have very few vendors whose attention to my business needs is truly almost immediate. Highly recommended and very much appreciated.
Edward Fitz
CEO at Domicile Global, Inc
CEO at Domicile Global, Inc
We’ve had a great experience working with Constellation Data Labs team. One of our biggest challenges going into this was navigating complex data requirements and making sure everything was set up correctly across multiple states.
Their team did an excellent job breaking things down into clear, manageable steps and guiding us through the process. What I value most is how easy they are to work with they truly feel like an extension of our team.
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Jennifer Hinds
Senior Brokerage Operations & Contract Specialist at Mainstay
Senior Brokerage Operations & Contract Specialist at Mainstay
We were looking for a national data provider for our investment services app. We came across Constellation after months of meeting with other companies. Their team are amazing and we would recommend them to anyone looking for high quality data in the real estate space.
Lisa Anderson
Developer at Investor Green Sheet LLC
Developer at Investor Green Sheet LLC
The Complete Data Infrastructure for Brokerages Lenders Proptechs Marketplaces Homebuilders
Data Infrastructure Across the Real Estate Technology Ecosystem
Access Standardized Property Data at Scale
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