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Nationwide Coverage. Lighting fast Updates

Unified, standardized listing integrations – delivered through a single integration.*

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*Requires licensure granted by the Multiple Listing Service (MLS)

*Requires licensure granted by the Multiple Listing Service (MLS)

0 %

North American Coverage

Update Latency
< 0 minutes
Active Listings
0 M+
Average Sold History
0 Years

One Seamless Pipeline, Start to Finish

Step 1

Use Case Validation

We start by understanding your product, data requirements, and target markets. Our team evaluates your use case against MLS policies and licensing frameworks to confirm eligibility, identify the right data sources, and define a clear path to production.

Step 2

Data Standardization

Every field mapped to RESO Data Dictionary standards. Consistent property types, status values, and measurement units across all markets. Zero data loss or field omission

Step 3

Flexible Data Delivery

Access data your way: GraphQL APIs, continuous streaming, webhooks, or cloud data shares (Snowflake, S3, Azure, GCP). Choose what fits your architecture

Step 4

Routine auditing and reporting for compliance

Automated monitoring tracks usage against provider requirements. Our team handles audits, reporting, and policy updates so you stay compliant without operational overhead

Built for Scale. Designed for Accuracy

Complete National Coverage

Direct integrations with every prominent MLS in North America. No gaps, no geographic limitations.

  • Nationwide MLS partnerships
  • All property types: residential, land, rental
  • 4M+ Active listings
  • Continuous expansion as new sources become available

Near Real-Time Data Updates

Under 5-minute average update latency. Your application always shows current data.

  • Continuous ingestion from all sources
  • Sub-minute latency in major markets
  • Automatic failover ensures uninterrupted flow
  • 24/7 monitoring and rapid issue resolution

RESO
Standardization

Consistent field names and data types across all sources. Build once, deploy nationwide.

  • Full RESO data dictionary compliance
  • Unified standards
  • Standardized addresses and coordinates
  • Continuous mapping refinement as standards evolve

Every Detailed Preserved

Every licensed field delivered in full. No summaries, no omissions, no "unimportant" fields stripped away.

  • Complete property details and characteristics
  • All media: photos, videos, virtual tours, documents
  • Full status and pricing history
  • Historical archives for market analysis
  • Original source fields preserved alongside standardized data

Flexible Integration Options

Choose the delivery method that fits your architecture. API for real-time queries. Batch files for analytics.

  • GraphQL APIs with <100ms p50 latency
  • Real-time event streams (Kafka, Kinesis, Event Hubs)
  • Batch delivery (JSON, CSV, Parquet, Avro)
  • Native cloud integration (Snowflake, S3, Azure, GCP)

Managed Compliance

Full-service compliance management included. We handle provider relationships, monitor usage, and manage audits.

  • Dedicated compliance team managing all relationships
  • Automated monitoring and enforcement
  • Audit coordination and documentation
  • Proactive notification of policy changes

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Full-Service Compliance

Licensing Coordination

Established relationships with sources accelerating resolution. We coordinate application and review, and ongoing renewals. Typical timeline: 3-8 days vs. months if done independently.

Regulatory Compliance

Automated systems monitor attribution, display rules, and usage against rules and regulations. Our team handles audits, reporting, and policy updates across all markets.

Risk Mitigation

Proactively manage risk through comprehensive, high-integrity data solutions and rigorous validation standards. Our audit-ready controls, and secure distribution practices ensure that clients operate with confidence—minimizing operational, financial, and regulatory risk.

Trusted Across the Real Estate Ecosystem

Property Search Platforms

Power property search with complete listings, rich media, and real-time updates.

Agent & Brokerage Tools

CRM, market analysis, and client collaboration tools for real estate professionals.

AVMs & Pricing Intelligence

AVM inputs with full property details, pricing history, and market context.

Market Research & Intelligence

Research and reporting on inventory, trends, and competitive intelligence.

Lending & Loan
Origination

Loan origination integration with property details and market validation.

Investment & Portfolio Intelligence

Deal sourcing, portfolio management, and rental market analysis.

Ready to integrate with Constellation Data Labs?

Schedule a call to explore our data solutions

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The Constellation Data Labs Difference

Unmatched Coverage

We maintain direct connections to more MLS systems than any other provider. If a feed exists, we have it or can add it within days.

Data Fidelity You Can Trust

Every licensed field delivered intact. Built-in validation catches issues before they reach production. Enterprise clients rely on our data for valuation models, underwriting, and compliance.

True Real-Time Performance

Our infrastructure processes updates from MLS sources continuously. Sub-minute latency means your users see listings the moment they go active. No batch delays, no stale data.

  • Continuous monitoring and ingestion
  • Automatic failover and redundancy
  • 24/7 support

Frequently Asked Questions

The Multiple Listing Service (MLS) is a database created and maintained to help consumers buy and sell property efficiently. Through the MLS, brokers share detailed information about inventory for sale and invite other brokers to cooperate in finding buyers.
 
This cooperative system dates back to the late 1800s, when brokers would gather to exchange property information to cooperate on the sale of homes. Today, hundreds of MLS systems allow real estate professionals to share listings across an entire market, giving sellers greater exposure and buyers access to a broad selection of homes.
 
The MLS helps create a more transparent and competitive marketplace by consolidating property information in one place. It ensures that brokerages of all sizes—from small local firms to large national companies—have equal access to the same pool of listings. While much MLS listing information is made publicly available online through broker websites, certain details remain private to protect sellers’ safety and privacy.
MLS data licensing is the legal framework that allows the access and use of copyrighted MLS listing data. Through formal data license agreements—participants and technology providers are granted permission to display or utilize MLS data in specific ways while adhering to rules governing usage, security, and compliance.
 
Participation generally requires approval from an MLS-member broker and the execution of agreements that outline permitted uses, data protection standards, and any applicable fees. By establishing clear guidelines for how listing data can be accessed, displayed, and protected, MLS data licensing ensures the integrity of property information.
 
Understanding the licensing requirements is critical for using this data legally. We are committed to helping our clients navigate these requirements and ensure compliance with all MLS regulations.
Yes. All listing data delivered through our platform is fully standardized to the Real Estate Standards Organization (RESO) Data Dictionary. That means fields like property type, pricing, status, and location follow a consistent structure—regardless of the source.
 
This high level of standardization simplifies integration, reduces time spent on mapping or translation, and ensures compatibility across tools, platforms, and regions.
 
Whether you’re powering search, analytics, or workflows, RESO-standardized data helps you scale faster and build with confidence.

The majority of listings are refreshed every 5 minutes.

Our data delivery is built to adapt to your architecture—not the other way around—so integration is smooth, scalable, and on your terms. Whether you’re streaming updates, replicating datasets, or delivering rich media at scale, we make it easy to put your data to use. We support multiple delivery options, including real-time APIs, streaming updates, and direct cloud sharing via Snowflake, S3, and more.

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