ID5 Alternatives 2026, Compared Independently
Identity Resolution · 8 compared · Updated
No vendor pays to appear or rank here. Alternatives are ordered by our reviewed relationships, then shared capabilities.
Looking to replace ID5? These are the 8 closest Identity Resolution alternatives we track, ranked by approved relationship and then by capability overlap — the closest matches come first.
- Closest match
- Lotame
- Direct replacements
- 8 compared
- Pricing
- Custom
No referral fees. Ordering is by approved relationship, then capability overlap. Nobody pays for a place in it.
What ID5 is, in short
ID5 is an independent identity infrastructure provider in the programmatic advertising identity-resolution market. Its core product issues a shared, encrypted ID5 Universal ID and resolves publisher, device and partner identifiers for use in OpenRTB, audience activation, measurement and addressability. It is closer to LiveRamp ATS, EUID and Unified ID 2.0 than to a general-purpose CDP or CRM identity graph. Its strengths are neutral positioning, strong Prebid and OpenRTB support, consent-aware identifier handling, and coverage across web, mobile app and CTV. The ideal customer is a publisher, SSP, DSP, data platform or advertiser that needs interoperable advertising identity without building its own graph.
Compared with LiveRamp ATS, ID5 is more deeply embedded in publisher monetization and header bidding; compared with The Trade Desk UID 2.0 and EUID, it is less tied to a single buyer ecosystem and offers broader partner-side identity enrichment. Buyers should evaluate ID5 when programmatic addressability, publisher yield or cross-platform ad identity is the primary requirement. Advertisers seeking deterministic onboarding and closed-loop measurement may prefer LiveRamp ATS or TransUnion; publishers already standardized on The Trade Desk or European Unified ID should assess incremental reach carefully. Validate match rates by geography and browser, consent behavior, partner coverage, ID persistence, CTV and mobile implementation effort, data-sharing terms, and the commercial costs of paid enrichment services.
ID5 alternatives compared
Ranked by relationship first — a tool approved as a direct replacement outranks one that merely shares capabilities. Tools judged to be complements to ID5 are excluded, because running both is not the same as replacing it. Direct-replacement verdicts were checked by hand; the one-line verdicts were drafted by an AI model, and most partial-overlap verdicts were accepted on its confidence.
Scroll the table sideways for switching effort and pricing →
| Vendor | Shared capabilities with ID5 | Switching effort | Pricing | Also strong in | Compare |
|---|---|---|---|---|---|
 Lotame 12 core capabilities | Ad Targeting / Retargeting Audience Activation / Sync Audience Segmentation +8 more | — | Custom | Data Marketplace | About Lotame |
 Wunderkind 19 core capabilities | Ad Targeting / Retargeting Audience Activation / Sync Audience Segmentation +8 more | — | Custom | Trigger-based Automation AI Send-time / Channel Optimization | About Wunderkind |
 LiveIntent 7 core capabilities | Ad Targeting / Retargeting Audience Activation / Sync Audience Segmentation +7 more | — | Custom | Campaign Management | About LiveIntent |
 Epsilon 11 core capabilities | Ad Targeting / Retargeting Audience Activation / Sync Audience Segmentation +6 more | — | Custom | Data Clean Rooms Journey Orchestration | About Epsilon |
 Experian Marketing Services 10 core capabilities | Ad Targeting / Retargeting Audience Activation / Sync Audience Segmentation +8 more | — | Custom | — | About Experian Marketing Services |
 Amperity 16 core capabilities | Ad Targeting / Retargeting Audience Activation / Sync Audience Segmentation +7 more | — | Custom | Predictive Scoring / Propensity Agent Interface (MCP / Tool API) | About Amperity |
 Claritas 11 core capabilities | Ad Targeting / Retargeting Audience Activation / Sync Audience Segmentation +9 more | — | Custom | AI Send-time / Channel Optimization | About Claritas |
 Verisk Marketing Solutions (InfutorData) 7 core capabilities | Ad Targeting / Retargeting Audience Activation / Sync Audience Segmentation +6 more | — | Custom | — | About Verisk Marketing Solutions (InfutorData) |
What to look for in a ID5 alternative
ID5’s core capabilities — check each alternative for coverage of these before shortlisting:
- Cross-device Matching
- Identity Resolution / ID Graph
- Universal Ad ID
- Audience Activation / Sync
- Data Enrichment
- Data Unification / Profile Stitching
- First-party Data Onboarding
ID5 alternatives — FAQ
What is the best alternative to ID5?
Lotame is the closest match among the 8 Identity Resolution alternatives we track. The two records share 11 core capabilities (Ad Targeting / Retargeting, Audience Activation / Sync). The right choice depends on your existing stack — compare all 8 in the table above.
What should I look for in a ID5 alternative?
ID5’s core strengths are Cross-device Matching, Identity Resolution / ID Graph, Universal Ad ID. Prioritise alternatives that cover the capabilities you actually use, and that integrate cleanly with the rest of your stack — a replacement that doesn’t connect to your warehouse, CDP, or activation tools isn’t really a replacement.
How much do ID5 alternatives cost?
Identity Resolution alternatives to ID5 are typically custom — check each vendor’s page for specifics.
Can I compare ID5 and Lotame side by side?
Yes. Drop both onto a canvas in Martech Stack Builder and see how each integrates with your warehouse, CDP, and activation tools — then score them against your actual requirements before deciding.
Compare the rest of the field
Evaluating more than one? Each alternative above has its own ranked comparison. They follow the approved relationships rather than the category, so they cross categories where the tools compete.
Before you replace ID5, check what you already own
Teams usually find the overlap is not where they expected. Name the tools you run and the Instant Stack Audit maps which ones duplicate capability — inside Identity Resolution and across the rest of the stack.
Takes about two minutes. Your overlaps and a savings estimate are free — no sign-up. An email address unlocks the costed roadmap.
Browse all Identity Resolution vendors
Stack Builder’s Identity Resolution page compares every vendor we track in this category, with capabilities, pricing, and a head-to-head for the closest pairs.
View all Identity Resolution vendors →Evaluating ID5 alternatives? Do it in your stack’s context.
Drop ID5 and the alternatives onto a canvas, see how they integrate with what you already have, and score them against your actual requirements — not a generic feature list.
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