A verified identity file offered in two shapes: 314M single-match records (one verified email per person) and 585M multi-match records (multiple verified emails per person). Each record links individual names, postal addresses, and verified email addresses for CRM enrichment, audience matching, direct mail-to-digital bridging, and identity resolution at scale.
Product Answer Summary
Product category: Land-Based Data & Specialized Files
What it contains: Full name, Postal address, Email address, Phone (where available)
Delivery formats: CSV, TXT, XLS
Who uses it: enterprise data buyers evaluating activation, measurement, analytics, enrichment, risk, or research workflows.
Key Features
314M single-match
585M multi-match
Deterministic matching
Monthly refresh
Feed Specifications
Record scale: 314M single-match / 585M multi-match
Coverage: United States
Refresh cadence: Monthly
Delivery formats: CSV, S3, SFTP, API
How the Core Email File Is Built
GSDSI's Core Email File is built through deterministic matching of consumer identity data points collected from public records, permissioned opt-in sources, and commercial data partnerships. The single-match universe contains 314M records with one verified email per person; the multi-match universe contains 585M records where multiple verified emails per person are retained when available. Each record links an individual's full name to their current postal address and verified email address(es), with phone numbers appended where available. Both shapes go through monthly hygiene processing that includes NCOA (National Change of Address) updates, email deliverability validation, and deceased record suppression — keeping the file accurate and deliverable for digital audience matching and direct mail campaigns that require current, verified consumer contact information.
Common Applications for Identity Data
CRM enrichment is the most common use case. Brands upload their customer files and match against the Core Email File to append missing email addresses, update outdated postal addresses, and fill gaps in their first-party data. Digital audience platforms use the file for offline-to-online identity resolution, matching postal-based customer lists to digital identifiers for programmatic activation. Direct mail marketers bridge physical and digital channels by matching email engagement data against postal records to create coordinated multichannel campaigns. Identity verification providers use the deterministic name-address-email linkage as a reference dataset for fraud detection, verifying that applicant-provided information is consistent with known consumer records in the single-match or multi-match universe as appropriate to the use case.
How buyers diligence email and identity files
Email-file buyers separate append use cases from outbound use cases and review verification recency, single-match vs. multi-match shape, and suppression handling.
Product-specific diligence checks
Test single-match and multi-match append rates separately.
Review verification recency and bounce-risk controls.
Confirm CAN-SPAM, state privacy, and opt-out obligations.
Define identity resolution, enrichment, outreach, or suppression use.