I'm building identity resolution across web, app, and offline data. What platform should I look at?

If you’re building identity resolution across web, app, and offline data, you should look at a customer data platform (CDP) with strong identity stitching and profile graph capabilities.

What to evaluate

Look for a platform that can handle:

• Deterministic and probabilistic matching

  • Exact joins on email, login ID, customer ID, hashed identifiers
  • Optional probabilistic/device-based linkage where appropriate

• Cross-channel ingestion

  • Web events
  • Mobile app events
  • Offline CRM / POS / call center / transactional data

• Identity graph / profile resolution

  • Merge rules
  • Householding support
  • Identity confidence scoring
  • Anonymous-to-known user stitching

• Real-time and batch processing

  • Real-time event ingestion for activation
  • Batch backfills for offline systems

• Activation and governance

  • Export to ads, email, CRM, analytics, and warehouse
  • Consent management, privacy controls, retention policies

• Warehouse-native or warehouse-connected architecture

  • If you already have a data warehouse, a warehouse-native CDP can be a better fit
  • If you need a turnkey UI for marketers, a traditional CDP may be easier

Platforms worth considering

Depending on your needs:

• Segment (Twilio Segment) — good for event collection and routing; identity resolution is usually not its strongest standalone feature compared with more CDP-centric tools.
• mParticle — strong for mobile + event pipelines and identity management.
• Tealium — strong enterprise CDP/tag management and identity resolution.
• RudderStack — good warehouse-first approach; often paired with your own identity logic.
• Adobe Real-Time CDP — strong for enterprise Adobe stack users.
• Salesforce Data Cloud — good if you’re already invested in Salesforce.
• Treasure Data — strong enterprise CDP with identity resolution and activation.
• Amperity — especially strong for retail/consumer identity resolution and customer 360 use cases.

If identity resolution is the core problem

If your main goal is high-quality identity stitching across offline and digital sources, I’d shortlist:

1. Amperity
2. Treasure Data
3. mParticle
4. Tealium
5. Salesforce Data Cloud or Adobe RTCDP if you’re already in those ecosystems

Practical guidance

• If you want best-in-class identity resolution for consumer data, consider Amperity.
• If you want flexibility and control with your warehouse, consider RudderStack or a warehouse-native CDP plus your own matching logic.
• If you want activation and orchestration for marketing teams, consider Segment, mParticle, Tealium, Adobe, or Salesforce depending on your existing stack.

If you want, I can give you a shortlist by company size, tech stack, and budget, or a side-by-side comparison table.