Identity Resolution Vendors
42 vendors tracked · 42 alternatives comparisons · 3 head-to-head · Updated
Every identity resolution vendor we track, with the capabilities each one actually covers — and a side-by-side alternatives comparison for each.
All Identity Resolution vendors
Long-established consumer data and identity company whose Real Identity platform resolves and manages people-based IDs…
Data and identity company whose Conexa platform provides portable, bring-your-own-graph identity and onboarding without…
AI-powered identity resolution platform that unifies customer data from disparate sources into persistent, accurate…
Marketing-data-infrastructure-as-a-service that gives agencies and martech builders white-label collection, identity…
Email-address-centric identity vendor offering verification, fraud signals, and email-to-postal/device identity…
Identity resolution provider with a licensed super-identity graph linking emails, postal addresses, phones, and devices…
AWS managed service that matches and links customer records across sources using rule-based, ML, or data-provider…
Data exchange platform providing identity graph matching, enrichment, and onboarding via a large US consumer…
Predictive AI for e-commerce that scores visitor purchase intent in real time and expands identified audiences for…
Cardlytics-owned identity platform that resolves in-store point-of-sale transactions to identifiable households for…
First-party data capture platform that collects granular behavioral events and resolves identity in real time without…
Audience segmentation and identity company (PRIZM heritage) offering onboarding, syndicated segments, and closed-loop…
Website visitor identity resolution tool that matches anonymous traffic to contactable profiles for e-commerce…
Identity resolution vendor focused on recognizing anonymous website visitors and enriching them for retargeting and…
Publicis-owned marketing platform whose CORE ID provides deterministic, person-level identity resolution and activation.
Experian's marketing arm provides consumer identity resolution, data enrichment, and audience activation built on its…
Device intelligence platform that assigns highly accurate persistent visitor identifiers for recognizing returning…
Real-time identity resolution API that unifies personal and professional identifiers into privacy-safe person profiles.
Composable CDP that activates data warehouse models as audiences, syncing to 200+ marketing, sales, and advertising…
European identity provider whose shared ID5 ID gives publishers and ad platforms a cookieless universal identifier.
Enterprise data management suite whose MDM Customer 360 and matching services provide identity mastering alongside…
Data clean-room / decentralized collaboration platform that matches customer datasets between companies without any raw…
Privacy-enhancing identity exchange that uses cryptoidentity matching so partners can link and onboard records without…
Email-based identity and advertising platform that uses hashed email addresses as the durable identifier for…
Data connectivity platform providing identity resolution, audience onboarding, and privacy-safe data collaboration for…
Data collaboration and identity company whose Panorama ID provides a privacy-conscious cookieless identifier and…
Merkle's identity and data platform providing a person-based ID graph, enrichment, and clean-room-friendly activation…
Enterprise server-side event routing platform that processes customer events in your own cloud infrastructure for…
Data collaboration and commerce platform that lets companies buy, sell, and onboard data with standardized identity…
Cloud-native master data management platform that unifies customer records into a governed Customer 360 with API access.
European identity graph and data-onboarding provider. Acquired Zeotap's third-party audience data business (2025)…
SAP's customer identity and access management product (formerly Gigya): registration and login, profile storage, and…
IP-based data onboarding and audience platform (Smart Zones) that matches offline data to digital audiences without…
Developer-focused entity resolution engine, embeddable as an API/library, that matches people and organizations across…
Teavaro enables real-time identity resolution and privacy-first data activation to power AI-ready marketing with owned…
Identity and data onboarding company specializing in deterministic matching, with a strong healthcare (HCP/DTC)…
Entity resolution engine that unifies customer records across systems using deterministic and probabilistic matching in…
TransUnion's marketing identity suite (built on its Neustar acquisition) offering identity resolution, audience…
Consumer identity and intelligence platform (built from the Infutor acquisition) providing identity resolution…
Performance marketing platform that recognises website visitors through its identity network and sends triggered email…
Warehouse-native, composable deployment of the Zeotap CDP. Builds unified customer profiles, segments, and…
Open-source ML-powered entity resolution library for deduplication and record linking across large datasets.
What each identity resolution vendor is built for
core grades onlyTwo vendors can list the same capability while only one is built around it. These are the core grades — central to the product — from three AI passes over each vendor's own documentation, or set by hand.
- Identity Resolution / ID Graph 42 of 42
- Acxiom , Adstra , Amperity , Aqfer , AtData , Audience Acuity , AWS Entity Resolution , BDEX , Black Crow AI , Bridg , Celebrus , Claritas , Customers.ai , Delivr.ai , Epsilon , Experian Marketing Services , Fingerprint , FullContact , Hightouch , ID5 , Informatica , InfoSum , Karlsgate , LiveIntent , LiveRamp , Lotame , Merkury (Merkle) , MetaRouter , Narrative , Reltio , Roqad , SAP Customer Data Cloud , Semcasting , Senzing , Teavaro , Throtle , Tilores , TransUnion TruAudience , Verisk Marketing Solutions (InfutorData) , Wunderkind , Zeotap Composable CDP , Zingg
- Data Unification / Profile Stitching 25 of 42
- Adstra , Amperity , Aqfer , AtData , Audience Acuity , Celebrus , Claritas , Epsilon , Experian Marketing Services , FullContact , Hightouch , ID5 , Informatica , LiveRamp , Lotame , Merkury (Merkle) , Reltio , SAP Customer Data Cloud , Teavaro , Throtle , Tilores , TransUnion TruAudience , Wunderkind , Zeotap Composable CDP , Zingg
- Audience Activation / Sync 24 of 42
- Amperity , Aqfer , Audience Acuity , Bridg , Claritas , Customers.ai , Delivr.ai , Epsilon , Experian Marketing Services , Hightouch , ID5 , LiveIntent , LiveRamp , Lotame , MetaRouter , Narrative , Roqad , Semcasting , Teavaro , Throtle , TransUnion TruAudience , Verisk Marketing Solutions (InfutorData) , Wunderkind , Zeotap Composable CDP
- Audience Segmentation 22 of 42
- Adstra , Amperity , Aqfer , Audience Acuity , BDEX , Claritas , Customers.ai , Delivr.ai , Epsilon , Experian Marketing Services , FullContact , Hightouch , LiveIntent , LiveRamp , Lotame , Narrative , Roqad , Semcasting , TransUnion TruAudience , Verisk Marketing Solutions (InfutorData) , Wunderkind , Zeotap Composable CDP
- First-party Data Onboarding 22 of 42
- Acxiom , Adstra , Audience Acuity , BDEX , Bridg , Claritas , Epsilon , Experian Marketing Services , Hightouch , ID5 , InfoSum , Karlsgate , LiveRamp , Lotame , Merkury (Merkle) , Narrative , Roqad , Semcasting , Throtle , TransUnion TruAudience , Verisk Marketing Solutions (InfutorData) , Zeotap Composable CDP
- Ad Targeting / Retargeting 19 of 42
- Adstra , Amperity , Audience Acuity , BDEX , Claritas , Delivr.ai , Epsilon , Experian Marketing Services , Hightouch , LiveIntent , LiveRamp , Lotame , Merkury (Merkle) , Roqad , Semcasting , Throtle , TransUnion TruAudience , Verisk Marketing Solutions (InfutorData) , Wunderkind
- Data Enrichment 17 of 42
- Acxiom , Aqfer , AtData , Audience Acuity , BDEX , Claritas , Customers.ai , Epsilon , Experian Marketing Services , FullContact , ID5 , LiveRamp , Lotame , Roqad , Semcasting , TransUnion TruAudience , Verisk Marketing Solutions (InfutorData)
- Visitor Identification 12 of 42
- AtData , BDEX , Black Crow AI , Celebrus , Claritas , Customers.ai , Delivr.ai , Fingerprint , LiveIntent , Teavaro , Throtle , Wunderkind
- Cross-device Matching 10 of 42
- Aqfer , Celebrus , Experian Marketing Services , ID5 , LiveRamp , Lotame , Roqad , Teavaro , Verisk Marketing Solutions (InfutorData) , Wunderkind
- Data Marketplace 7 of 42
- Amperity , BDEX , Informatica , LiveRamp , Lotame , Narrative , TransUnion TruAudience
- Journey Orchestration 6 of 42
- Amperity , Customers.ai , Epsilon , Hightouch , Wunderkind , Zeotap Composable CDP
Replacing a identity resolution tool?
Each comparison ranks alternatives by approved relationship, then capability overlap, and shows the switching effort — tools judged to be complements are excluded.
- Acxiom alternatives 8
- Adstra alternatives 8
- Amperity alternatives 8
- Aqfer alternatives 8
- AtData alternatives 8
- Audience Acuity alternatives 8
- AWS Entity Resolution alternatives 8
- BDEX alternatives 8
- Black Crow AI alternatives 8
- Bridg alternatives 8
- Celebrus alternatives 8
- Claritas alternatives 8
- Customers.ai alternatives 8
- Delivr.ai alternatives 8
- Epsilon alternatives 8
- Experian Marketing Services alternatives 8
- Fingerprint alternatives 8
- FullContact alternatives 8
- Hightouch alternatives 8
- ID5 alternatives 8
- Informatica alternatives 8
- InfoSum alternatives 8
- Karlsgate alternatives 8
- LiveIntent alternatives 8
- LiveRamp alternatives 8
- Lotame alternatives 8
- Merkury (Merkle) alternatives 8
- MetaRouter alternatives 8
- Narrative alternatives 8
- Reltio alternatives 8
- Roqad alternatives 8
- SAP Customer Data Cloud alternatives 8
- Semcasting alternatives 8
- Senzing alternatives 8
- Teavaro alternatives 8
- Throtle alternatives 8
- Tilores alternatives 8
- TransUnion TruAudience alternatives 8
- Verisk Marketing Solutions (InfutorData) alternatives 8
- Wunderkind alternatives 8
- Zeotap Composable CDP alternatives 8
- Zingg alternatives 8
Identity Resolution head-to-head
Down to two? These pages put the full capability matrix side by side.
Further reading
This page records which vendors sit on the identity resolution shelf. These go into how the category is changing, and what to watch when you shortlist — by the same author, on Martech Therapy.
Identity Resolution — questions
Which identity resolution providers are there?
We track 42 identity resolution vendors, including Acxiom, Adstra, Amperity, Aqfer, AtData, Audience Acuity. Each has a profile with its capabilities graded core or supported from the vendor's own documentation, and 42 of them have a ranked alternatives comparison.
What do identity resolution platforms actually do?
On this shelf the capabilities most vendors are built around are identity resolution / id graph, data unification / profile stitching, audience activation / sync, audience segmentation. "Built around" is a core grade — central to what the product is — not merely present on a feature list.
How do I compare identity resolution tools?
Start from what the tool is core to rather than a feature count: two vendors can list the same capability while only one is built around it. 3 head-to-head pages on this shelf put the full capability matrix side by side, and the alternatives pages rank by approved relationship, then capability overlap.
Which identity resolution companies are the largest?
We do not rank by company size, and deliberately: headcount and funding say nothing about whether a product covers the capability you need. 42 identity resolution vendors are listed here in catalog order, each graded on what it is built around. Sort by the capability you are buying for instead — that is what the shelf below is for.
Is there a list of identity resolution software?
This page is it: every identity resolution product in the catalog, 42 of them carrying a capability record graded from the vendor's own documentation, with the source page linked where one was recorded. It rebuilds from the catalog, so a vendor added tomorrow appears here without anyone editing a list.
Choosing a identity resolution tool? Do it in your stack's context.
Drop the shortlist onto a canvas, see how each one integrates with what you already have, and score them against your actual requirements — not a generic feature list.
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