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ATTOM

Powering Innovation with Premium Property Data

Underwriting & Risk Established PE-Backed
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Overview

ATTOM is a leading nationwide provider of premium property data covering more than 158 million U.S. residential and commercial properties -- 99% of the nation's population. The company aggregates property tax, deed, mortgage, foreclosure, environmental risk, natural hazard, climate, parcel boundary, neighborhood, and valuation data into a comprehensive 30TB data warehouse with more than 70 billion rows of transactional-level data and 9,000+ discrete attributes.

Founded in 1996 as RealtyTrac and rebranded as ATTOM Data Solutions in 2016, the company has grown into one of the most trusted sources of property intelligence in the United States. ATTOM delivers data through multiple channels -- APIs, bulk data licensing, cloud delivery (Snowflake, Databricks, Parquet), and its ATTOM Nexus platform -- enabling organizations across real estate, finance, insurance, government, and proptech to integrate property intelligence at scale.

For the insurance industry, ATTOM provides the property and hazard data that underpins underwriting, risk assessment, catastrophe modeling, and claims processing. Insurers use ATTOM to evaluate property-specific risks including flood zones, wildfire exposure, climate hazards projected through 2050, and parcel-level characteristics that affect policy pricing and portfolio management.

Products & Services

ATTOM Property Data API

A production-grade REST API delivering real-time access to ATTOM's comprehensive property database. Powers underwriting automation, automated valuation models (AVMs), risk modeling, insurance workflows, proptech applications, and AI systems. Covers property characteristics, ownership history, deeds, mortgages, sales trends, building permits, and hazard risk ratings.

Key Features

  • 158M+ U.S. properties with 9,000+ data attributes
  • Real-time access to assessor tax, AVM, mortgage history, FEMA flood hazard, and parcel boundary data
  • Purpose-built for high-volume production workloads (underwriting, claims, analytics)
  • Full developer documentation and sandbox environment via ATTOM Developer Platform

Target Users: Insurance carriers, MGAs, proptech developers, mortgage lenders, data science teams

ATTOM Nexus

A proprietary cloud platform for exploring, understanding, and engaging with ATTOM's full property, neighborhood, and analytics dataset in one place. Supports underwriting, content enrichment, market analytics, portfolio monitoring, and lead generation.

Key Features

  • Unified interface for property search, data exploration, and report generation
  • Supports underwriting due diligence and policy monitoring workflows
  • Market analytics and portfolio management dashboards
  • No-code data access alongside API integration

Target Users: Insurance underwriters, analysts, data teams

Bulk Data Licensing

Large-scale delivery of ATTOM's complete property datasets for organizations requiring full data ownership. Delivered in standard formats including Parquet and GeoParquet for geospatial applications.

Key Features

  • Full property tax, deed, mortgage, AVM, rental AVM, home equity, and hazard risk datasets
  • Hazard data covers flood, wildfire, drought, storm, heat, wind, tornado, hail, hurricane, radon, air pollution, earthquake, and weather
  • Climate change risk ratings current and projected to 2050
  • Parcel boundary data for catastrophe modeling and map-based applications

Target Users: Insurance carriers, reinsurers, CAT modelers, institutional investors

Cloud Delivery (Snowflake and Databricks)

ATTOM data available natively within Snowflake and Databricks environments, enabling direct query without manual file uploads or ETL pipelines. Launched 2025.

Key Features

  • Live query access to 158M property records within existing cloud analytics environments
  • Supports AI model training, forecasting, and real-time application development
  • Datasets include assessor tax, AVM, FEMA flood hazard, mortgage history, and parcel boundaries
  • Eliminates data pipeline complexity for analytics teams

Target Users: Data engineering teams, insurance analytics, AI/ML teams

Climate and Hazard Risk Data

Comprehensive environmental risk dataset covering 14 categories of natural hazard, with current assessments and 2050 projections. Enables insurers to assess catastrophe exposure at the parcel level.

Key Features

  • 14 hazard types: wildfire, flood, drought, storm, heat, wind, tornado, hail, hurricane, radon, air pollution, earthquake, weather, FEMA flood zones
  • Current risk ratings plus 2050 climate projections
  • Parcel-level granularity for precise underwriting and portfolio analysis
  • Integrates with ATTOM's property characteristics for combined risk-property profiles

Target Users: P&C carriers, reinsurers, catastrophe modelers, MGAs

At a Glance

Founded
1996
Headquarters
Irvine, California
Employees
51-200
Funding
PE-Backed

Category & Focus

Category
Underwriting & Risk
Subcategories
Data enrichment risk scoring property hazard data climate risk AVM
Insurance Verticals
P&C Personal P&C Commercial Specialty/E&S Title
Target Customers
Carriers, MGAs/MGUs, TPAs, Reinsurers

Customers

  • DIMONT (flood insurance valuation automation -- nearly tripled processing productivity)
  • Mortgage servicers (property data pre-fill for insurance claims)

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Last updated: 2026-04-09