Identity resolution · FullContact, Inc.
FullContact
Privacy-focused identity resolution API that matches contact fragments (email, phone, device IDs) into a single hashed identity.
FullContact resolves fragments of identifying data an organization already holds — hashed emails, phone numbers, device and cookie IDs — into a single, privacy-preserving identifier through its Resolve product, without requiring or returning raw PII in the response. Its Enrich API adds demographic and firmographic attributes to a resolved identity for personalization or lead scoring, and Identity Streme extends resolution to real-time, streaming use cases such as ad-tech bidding. It positions itself specifically on privacy-by-design: inputs and outputs are typically hashed, and it markets a 'zero data retention' option for regulated customers. It is API-first and delivered as a cloud service used by brands, agencies and ad-tech platforms that need to stitch together a fragmented view of the same person across systems and vendors.
At a glance
| Vendor | FullContact, Inc. |
|---|---|
| Pricing model | Quote only |
| Free tier | No |
| Deployment | Cloud |
| Open source | No |
| Best for | Ad-tech platforms and brands needing privacy-preserving identity matching via API rather than a full marketing suite. |
Pricing
No public pricing; all plans are quoted after contacting sales.
Checked on the vendor's own page on September 21, 2026: no prices are published. Expect to be quoted.
Features
- Resolve API: multi-signal identity matching
- Enrich API: demographic and firmographic append
- Identity Streme for real-time/streaming resolution
- Hashed input/output for privacy-by-design matching
- Zero data retention option for regulated customers
- Customer recognition across anonymous and known touchpoints
Integrations
Profile last reviewed September 21, 2026