What Is Identity Resolution?
Identity resolution is the process of connecting disparate data points — emails, device IDs, cookies, IP addresses, physical addresses — into a unified consumer profile. It's the invisible infrastructure that powers personalization, attribution, and omnichannel marketing.
Without it, you're marketing to fragments. A visitor on your website is a stranger. The same person opening your email is someone else entirely. And the household that received your direct mail piece? Completely disconnected from both.
Identity resolution closes these gaps. It turns noise into signal, and signal into revenue.
72%
of marketers can't connect offline + online data
3.2x
lift in ROAS with unified identity
89%
of enterprises investing in ID resolution by 2027
Deterministic vs. Probabilistic Matching
Not all identity resolution is created equal. The two primary approaches — deterministic and probabilistic — differ dramatically in accuracy, scale, and use case.
Deterministic
Uses exact-match identifiers like email, phone, or hashed PII. Produces high-confidence matches with 95%+ accuracy.
Probabilistic
Uses behavioral signals, device fingerprints, and statistical models. Higher scale but lower confidence (70-85%).
Building Your Identity Graph
An identity graph is the data structure that stores resolved identities and their relationships. Think of it as your single source of truth for "who is this person?"
1. Collect first-party signals
Start with your owned data: form fills, logins, purchase history, email engagement. These are your highest-confidence anchors.
2. Enrich with third-party data
Layer on demographic, firmographic, and behavioral attributes from trusted data partners to fill gaps and add context.
3. Resolve across touchpoints
Use deterministic keys (email, phone) to stitch online behavior to offline identities. Apply probabilistic methods for incremental reach.
4. Maintain and decay
Identities aren't static. Build decay logic to age out stale data, handle movers, and refresh attributes on a rolling basis.
5. Activate everywhere
Push resolved audiences to your ad platforms, CRM, email tool, and direct mail vendor — all from a single, unified profile.
Use Cases That Drive Revenue
Identity resolution isn't an abstract concept — it directly powers the campaigns and workflows that generate pipeline.
Visitor Identification
Turn anonymous website traffic into named leads with matched contact data.
Lookalike Modeling
Build high-performing seed audiences from resolved identity graphs.
CRM Enrichment
Append missing fields — phone, address, firmographics — to existing records.
Real-Time Personalization
Serve dynamic content based on resolved visitor identity and intent signals.
Cross-Channel Attribution
Connect the dots between email opens, site visits, and offline conversions.
Suppression & Compliance
Honor opt-outs across all channels by resolving identities to a single record.
Privacy-First Identity Resolution
In a post-cookie, privacy-regulated world, identity resolution must be built on consent, transparency, and compliance. Here's what that looks like:
Ready to unify your data?
DataMoon's identity graph resolves 280M+ consumer profiles with deterministic matching. See it in action.
Book a Demo